2024-03-29T15:39:43Z
https://www.tropicalgrasslands.info/index.php/tgft/oai
oai:oai.tropicalgrasslands.info:article/103
2022-08-04T13:27:27Z
tgft:SC
"140924 2014 eng "
2346-3775
dc
Collecting Venezuelan <i>Stylosanthes</i> species
Calles, Teodardo
Fundación Instituto Botánico de Venezuela, Caracas, Venezuela.
Universität Hohenheim, Stuttgart, Germany.
Schultze-Kraft, Rainer
Universität Hohenheim, Stuttgart, Germany.
Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia.
A report on recent activities to collect representative germplasm samples of Stylosanthes species native to Venezuela is presented. The main objective was to obtain original seeds for phylogenetic studies and, at the same time, to contribute to safeguarding Stylosanthes diversity, in view of the increasing danger of genetic erosion. Seeds of 33 samples, comprising all 11 Venezuelan Stylosanthes species, were collected: S. angustifolia, S. capitata, S. gracilis, S. guianensis, S. hamata, S. humilis, S. scabra and S. viscosa plus the endemic and little-known S. falconensis, S. sericeiceps and S. venezuelensis. Populations of the latter 3 species were small and difficult to locate; these species must be considered endangered and require further attention by genetic resources specialists. Furthermore, assessment of their agronomic and forage potential, in particular, S. falconensis and S. sericeiceps, is warranted.
Keywords: Genetic resources, Leguminosae, S. falconensis, S. sericeiceps, S. venezuelensis.
DOI: 10.17138/TGFT(2)287-293
Centro Internacional de Agricultura Tropical (CIAT)
2014-09-25 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/103
Tropical Grasslands-Forrajes Tropicales; Vol. 2 No. 3: September 2014
eng
Copyright (c) 0
oai:oai.tropicalgrasslands.info:article/283
2022-08-04T13:43:52Z
tgft:SC
"160527 2016 eng "
2346-3775
dc
New species, nomenclatural changes and recent taxonomic studies in the genus <i>Stylosanthes</i> (Leguminosae): An update
Calles, Teodardo
Instituto Experimental Jardín Botánico “Dr. Tobías Lasser”, Universidad Central de Venezuela, Caracas, Venezuela.
Schultze-Kraft, Rainer
Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia.
Since the last taxonomic overview during the 1982 Stylosanthes Symposium in Townsville, Australia, 10 new species: S. falconensis, S. longicarpa, S. maracajuensis, S. nunoi, S. quintanarooensis, S. recta, S. salina, S. seabrana, S. vallsii and S. venezuelensis; and 1 botanical variety: S. guianensis var. pauciflora; have been validly described. Furthermore, 2 nomenclatural changes have been proposed, both being elevations of botanical varieties to the rank of species: S. gracilis and S. rostrata. In the major taxonomic databases, The Plant List and GRIN, the taxonomic status (“accepted” vs. “synonym” vs. “unresolved”) of some of these new taxa, however, differs. In addition, this paper reports on Stylosanthes names that can be found in the post-symposium literature but have not been validly published, and on recent regional studies of Stylosanthes taxonomy. Suggested research needs as perceived by non-botanists include an updated Stylosanthes monograph and taxonomic studies within the S. guianensis, S. hamata and S. scabra species complexes.
Keywords: Taxonomy, validly published names.
DOI: 10.17138/TGFT(4)122-128
Centro Internacional de Agricultura Tropical (CIAT)
2016-05-31 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/283
Tropical Grasslands-Forrajes Tropicales; Vol. 4 No. 2: May 2016
eng
Copyright (c) 0
oai:oai.tropicalgrasslands.info:article/299
2022-08-04T13:44:47Z
tgft:SC
"170529 2017 eng "
2346-3775
dc
A simple method for determining maize silage density on farms
Krüger, Ana Maria
Departamento de Zootecnia, Universidade Estadual de Maringá, Maringá, PR, Brazil.
Jobim, Clóves C.
Departamento de Zootecnia, Universidade Estadual de Maringá, Maringá, PR, Brazil.
de Carvalho, Igor Q.
Departamento de Zootecnia, Universidade Estadual de Maringá, Maringá, PR, Brazil.
Moro, Julienne G.
Departamento de Zootecnia, Universidade Estadual de Maringá, Maringá, PR, Brazil.
Several methodologies have been tested to evaluate silage density, with direct methods most popular, whereas indirect methods that can be used under field conditions are still in development and improvement stages. This study aimed to establish relationships between estimates of maize silage density determined using a direct and an indirect method, in an endeavor to provide an alternative to direct measurement for use in the field. Measurements were performed on maize silage in 14 silos. The direct method involved the use of a metal cylinder with a saw-tooth cutting edge attached to a chainsaw to extract a core of silage. Density of the silage was determined taking into consideration the cylinder volume and dry matter weight of silage removed at 5 points on the silage face. With the indirect method, a digital penetrometer was used to estimate silage density by measuring the penetration resistance at 2 points adjacent to the spots where the silage cores were taken, i.e. 10 readings per silo. Values of penetration resistance (measured in MPa) were correlated with the values of silage mass (kg/m3) obtained by direct measurement through polynomial regression analysis. A positive quadratic relationship was observed between penetration resistance and silage density for both natural matter and dry matter (R² = 0.57 and R² = 0.80, respectively), showing that the penetrometer was a reasonably reliable and simple indirect method to determine the density of dry matter in maize silage. Further testing of the machine on other silos is needed to verify these results.
Keywords: Ensiled matter, penetrometer, resistance, silos evaluation.
Centro Internacional de Agricultura Tropical (CIAT)
2017-05-31 00:00:00
shortCommunications
application/pdf
application/zip
https://www.tropicalgrasslands.info/index.php/tgft/article/view/299
Tropical Grasslands-Forrajes Tropicales; Vol. 5 No. 2: May 2017
eng
Copyright (c) 0
oai:oai.tropicalgrasslands.info:article/301
2021-06-02T20:51:13Z
tgft:SC
"191130 2019 eng "
2346-3775
dc
Seasonal influence on mineral concentration of forages on flooded pastures in South Sumatra, Indonesia
Ali, Asep Indra Munawar
Department of Animal Science, Faculty of Agriculture, University of Sriwijaya, Palembang, South Sumatra, Indonesia. https://mail.yahoo.com/?.intl=id&.lang=id-ID
Sandi, Sofia
Department of Animal Science, Faculty of Agriculture, University of Sriwijaya, Palembang, South Sumatra, Indonesia.
Riswandi, Riswandi
Department of Animal Science, Faculty of Agriculture, University of Sriwijaya, Palembang, South Sumatra, Indonesia.
Muhakka, Muhakka
Department of Animal Science, Faculty of Agriculture, University of Sriwijaya, Palembang, South Sumatra, Indonesia.
This study was conducted to evaluate macro- and micro-mineral concentrations in forages growing on seasonally flooded native pastures in non-tidal swamps of South Sumatra, Indonesia and grazed by buffalo. The upper part of native forage plants from 5 species of Poaceae, 4 species of Leguminosae, 3 species of Cyperaceae and 1 species of Onagraceae were sampled by hand-plucking during flooded and dry seasons. The results showed that mineral concentrations of forages varied greatly between seasons. In general concentrations of most minerals were adequate to supply the dietary needs of grazing ruminants in both wet and dry seasons. Phosphorus (P) concentrations were low in all species in both wet and dry seasons but growing animals should select a diet adequate in P, while lactating females could benefit from P supplementation. In cut-and-carry situations, animals would probably respond to additional P in the diet. These hypotheses need testing in the field.
Centro Internacional de Agricultura Tropical (CIAT)
2019-11-30 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/301
Tropical Grasslands-Forrajes Tropicales; Vol. 7 No. 5: November 2019
eng
Copyright (c) 2019 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/307
2022-08-04T13:45:07Z
tgft:SC
"160923 2016 eng "
2346-3775
dc
Neglected grass species of Southern Africa: Nutritive value of conserved <i>Hyperthelia dissoluta</i> harvested at different growth stages
Gusha, Jacob
Department of Paraclinical Veterinary Studies, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Chambwe, Tonderai
Department of Animal Science, Faculty of Agriculture, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Mugabe, Prisca H.
Department of Animal Science, Faculty of Agriculture, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Halimani, Tinyiko
Department of Animal Science, Faculty of Agriculture, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Katsande, Simbarashe
Department of Paraclinical Veterinary Studies, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Masocha, Mhosisi
Department of Geography and Environmental Studies, Faculty of Science, University of Zimbabwe, Mt Pleasant, Harare, Zimbabwe.
Native species like Hyperthelia dissoluta have great potential in livestock production but not much has been done to improve their contribution to that sector. This study examined 2 conservation methods (drying and ensiling) and 3 different growth stages, namely: elongation stage (January), early flowering (February) and late flowering stage (March) of H. dissoluta in terms of nutritional composition and digestibility. The method of conservation had a significant effect (P<0.05) on nutritive value, with silage having more P and CP than hay. Stage of growth had an effect (P<0.05) on all nutritional properties of both hay and silage: Phosphorus, Ca and CP concentrations and digestibility of hay and silage decreased with maturity, while NDF and ADF concentrations increased. Silage pH value was significantly higher at elongation (5.2) and late flowering growth stages (5.7) than at early flowering (4.4). Dry matter digestibility of the conserved material reached levels as high as 82% for silage made at the elongation stage with all values at least 60%. We conclude that H. dissoluta can be conserved as both silage and hay to produce a good quality feed. Harvesting at the early flowering stage would seem to provide a good compromise between quantity (not measured in this study) and quality of harvested forage. Further studies seem warranted to determine the acceptability and intake of the material by livestock, the advantages of adding fermentable carbohydrates during ensiling and DM yields in different areas and a range of seasonal conditions.
Keywords: Air drying, hay, perennial native grasses, plastic bag silo, quality silage.
DOI: 10.17138/TGFT(4)179-184
Centro Internacional de Agricultura Tropical (CIAT)
2016-09-27 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/307
Tropical Grasslands-Forrajes Tropicales; Vol. 4 No. 3: September 2016
eng
Copyright (c) 0
oai:oai.tropicalgrasslands.info:article/351
2021-06-02T19:08:18Z
tgft:SC
"180530 2018 eng "
2346-3775
dc
Chemical composition of hays of the Caatinga shrub legumes mororó and sabiá from different parts of the plant
de Oliveira, Osniel F.
Departamento de Zootecnia, Universidade Federal Rural de Pernambuco (UFRPE), Campus Recife, Recife, Pernambuco, Brazil.
de Lima, Amanda F.
Departamento de Zootecnia, Universidade Federal Rural de Pernambuco (UFRPE), Campus Recife, Recife, Pernambuco, Brazil.
dos Santos, Mércia V. F.
Departamento de Zootecnia, Universidade Federal Rural de Pernambuco (UFRPE), Campus Recife, Recife, Pernambuco, Brazil.
Guim, Adriana
Departamento de Zootecnia, Universidade Federal Rural de Pernambuco (UFRPE), Campus Recife, Recife, Pernambuco, Brazil.
da Cunha, Márcio V.
Departamento de Zootecnia, Universidade Federal Rural de Pernambuco (UFRPE), Campus Recife, Recife, Pernambuco, Brazil.
Lira, Mário de A.
Instituto Agronômico de Pernambuco (IPA), Recife, Pernambuco, Brazil.
Native forages are important feed sources in the northeastern semi-arid region of Brazil. The objective of this study was to evaluate the chemical characteristics of hays made from the native shrub legumes, sabiá (Mimosa caesalpiniifolia Benth.) and mororó [Bauhinia cheilantha (Bong.) Steud.], using different plant fractions, leaves only or leaves plus twigs. Analyses carried out were: concentrations of dry matter (DM), crude protein (CP), neutral detergent fiber (NDF), ether extract (EE), ash, total digestible nutrients (TDN) and non-fiber carbohydrates (NFC). Sabiá leaf hay contained greater CP concentration (182 g/kg DM) than mororó leaf hay (126 g/kg DM) but hay made from leaf plus twigs showed similar CP for both legumes (mean 106 g/kg DM). Concentrations of NDF (368 g/kg DM), NFC (418 g/kg DM) and TDN (481 g/kg DM) of mororó leaf hay were superior to those of sabiá leaf hay (465, 258 and 311 g/kg DM, respectively). The findings suggest that these native legumes can be conserved as hay during the growing season to provide a supplementary feed with acceptable nutritive value for feeding during the period of inadequate feed availability and quality in semi-arid Brazil. However, more samples from a range of growth stages and locations are needed to confirm these preliminary findings and to provide data on possible yields, while more feeding studies with ruminants are needed to confirm the preliminary data in terms of liveweight performance.
Centro Internacional de Agricultura Tropical (CIAT)
2018-05-30 00:00:00
shortCommunications
application/pdf
application/epub+zip
https://www.tropicalgrasslands.info/index.php/tgft/article/view/351
Tropical Grasslands-Forrajes Tropicales; Vol. 6 No. 2: May 2018
eng
Copyright (c) 2018
oai:oai.tropicalgrasslands.info:article/395
2022-08-04T13:56:14Z
tgft:SC
"180131 2018 eng "
2346-3775
dc
Long-term assessment of a new rotational-grazing management strategy called PUP-grazing (proportion of un-grazed pasture)
Pavetti, Daniel R.
https://inta.gob.ar/
Benvenutti, Marcelo A.
https://www.dpi.qld.gov.au
Radke, Óscar
https://inta.gob.ar/
Cibils, Ómar A.
https://inta.gob.ar/
Una nueva estrategia de pastoreo rotativo – Renopa (remanente no pastado) – fue comparada productiva y económicamente con el pastoreo rotativo tradicional (PRT) en pasturas de Axonopus catarinensis durante dos periodos (2013/14 y 2015/16) en la provincia de Misiones, Argentina, utilizando terneros de cruza Cebú. El promedio del remanente no pastado del Renopa y el PRT fue 11.5 y 3.4% del área de pastura, respectivamente. La ganancia diaria de peso fue significativamente más alta (P<0.05) para el Renopa que para el PRT (606 vs. 420 g/día). La ganancia de peso por hectárea también fue 35% más alta para el Renopa (194 vs. 144 kg/ha por periodo). El ingreso bruto por hectárea fue mucho más alto para el Renopa (US$ 85.7 vs. 8.4/ha por periodo). Concluimos que el Renopa tiene un alto potencial para mejorar la productividad de pasturas de A. catarinensis.
Palabras clave: Consumo de forraje, ganado vacuno, ganancia de peso, manejo del pastoreo, margen bruto.
DOI: 10.17138/TGFT(6)53-57
Centro Internacional de Agricultura Tropical (CIAT)
2018-01-30 00:00:00
shortCommunications
application/pdf
application/zip
https://www.tropicalgrasslands.info/index.php/tgft/article/view/395
Tropical Grasslands-Forrajes Tropicales; Vol. 6 No. 1: January 2018
spa
Copyright (c)
oai:oai.tropicalgrasslands.info:article/440
2021-06-02T20:53:21Z
tgft:SC
"191130 2019 eng "
2346-3775
dc
Estimating chlorophyll concentration and its relationship with crude protein concentration in three species of Urochloa in the Piedemonte Llanero, Colombia
Rincón Castillo, Álvaro
Álvarez de León, Mauricio
Pardo Barbosa, Oscar
Amaya, Mary Alejandra
Díaz Giraldo, Raúl Alejandro
Para conocer la relación entre la intensidad del color verde de las hojas y la concentración de proteína cruda (PC) foliar en los pastos Urochloa brizantha, U. decumbens y U. humidicola en el Piedemonte Llanero de Colombia, se midió la concentración de la clorofila en las hojas (en unidades SPAD), se relacionó con la intensidad del color verde según la Tabla Munsell y se comparó con la concentración de PC determinada por el método Kjeldahl. El análisis de regresión entre las concentraciones de clorofila y PC mostró coeficientes de determinación (r2) entre 0.76 y 0.88. Aunque los datos obtenidos no permiten generar para las tres especies estudiadas tablas colorimétricas concluyentes basadas en la Tabla Munsell, las relaciones obtenidas son de utilidad para asistir a los productores en sus decisiones sobre la utilización y la fertilización de pasturas de la región.
Centro Internacional de Agricultura Tropical (CIAT)
2019-11-30 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/440
Tropical Grasslands-Forrajes Tropicales; Vol. 7 No. 5: November 2019
spa
Copyright (c) 2019 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/474
2021-06-03T00:15:03Z
tgft:SC
"200530 2020 eng "
2346-3775
dc
Pasto Certo® version 2.0 - An application about Brazilian tropical forage cultivars for mobile and desktop devices
Barrios, Sanzio Carvalho Lima
Embrapa Gado de Corte, Campo Grande, MS, Brazil.
Carromeu, Camilo
Embrapa Gado de Corte, Campo Grande, MS, Brazil.
Silva, Márcio Aparecido Inácio da
Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Matsubara, Edson Takashi
Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Valle, Cacilda Borges do
Embrapa Gado de Corte, Campo Grande, MS, Brazil.
Jank, Liana
Embrapa Gado de Corte, Campo Grande, MS, Brazil.
Santos, Mateus Figueiredo
Embrapa Gado de Corte, Campo Grande, MS, Brazil.
Assis, Giselle Mariano Lessa de
Embrapa Acre, Rio Branco, AC, Brazil.
Crivellaro, Leonardo Lazarino
Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Gonçalves, Thallyson Danchen Teixeira
Universidade para o Desenvolvimento do Estado e da Região do Pantanal – Anhanguera/Uniderp, Campo Grande, MS, Brazil.
Queiroz Júnior, José Marcos
Universidade Católica Dom Bosco, Campo Grande, MS, Brazil.
Candido, Anderson Ramires
Universidade Estadual de Mato Grosso do Sul (UEMS), Aquidauana, MS, Brazil.
Machado, Wyverson Kim Rocha
Universidade Estadual de Mato Grosso do Sul (UEMS), Aquidauana, MS, Brazil.
Gouveia, Beatriz Tomé
Universidade Federal de Lavras, Lavras, MG, Brazil.
Nobre, Alana Aparecida Amarilha
Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Zanella, Ayhan Liell
Universidade Católica Dom Bosco, Campo Grande, MS, Brazil.
A brief outline of the second version of Pasto Certo®, released by Embrapa and partners in February 2019, is presented. It is an improved and updated version of Pasto Certo® 1.0, an application that describes Brazilian commercial tropical forage cultivars. The application helps the user to identify and differentiate cultivars, provides recommendations and information on use restrictions of each cultivar, and compares different cultivars in terms of a number of characteristics. In comparison with the first version (published in 2017), new features of Pasto Certo® 2.0 are: (1) 7 cultivars of forage legumes (genera Arachis, Cajanus and Stylosanthes) were added to the original 16 grass cultivars (Urochloa spp. and Megathyrsus maximus); (2) the user can choose between Portuguese, Spanish and English languages; (3) information on commercial seed sources in Brazil is included; (4) a guide to selecting the most suitable cultivar for specific conditions is provided; and (5) the application is available for different platforms (Android, iOS and WEB - www.pastocerto.com).
Centro Internacional de Agricultura Tropical (CIAT)
2020-05-30 18:22:22
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/474
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 2: May 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/488
2021-06-03T00:02:11Z
tgft:SC
"200530 2020 eng "
2346-3775
dc
The effect of stage of regrowth on the physical composition and nutritive value of the various vertical strata of kikuyu (<i>Cenchrus clandestinus</i>) pastures
Benvenutti, Marcelo A.
Queensland Department of Agriculture and Fisheries, Gatton Campus, Lawes, QLD, Australia.
Findsen, Craig
Queensland Department of Agriculture and Fisheries, Gatton Campus, Lawes, QLD, Australia.
Savian, Jean V.
Instituto Nacional de Investigación Agropecuaria (INIA), Treinta y Tres, Uruguay.
Grupo de Pesquisa Ecologia do Pastejo, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Mayer, David G.
Queensland Department of Agriculture and Fisheries, Gatton Campus, Lawes, QLD, Australia.
Barber, David G.
Queensland Department of Agriculture and Fisheries, Gatton Campus, Lawes, QLD, Australia.
A plot study was conducted at the Gatton Research Dairy, Queensland, Australia, to quantify the effects of 5 regrowth periods (9, 11, 14, 16 and 18 days) and 4 vertical strata on the composition and nutritive value of kikuyu (Cenchrus clandestinus) pastures using a block factorial design with 4 replicates. Pasture samples were analyzed for crude protein (CP), ethanol-soluble carbohydrates (ESC), acid detergent fiber (ADF), neutral detergent fiber (aNDFom), in vitro indigestible neutral detergent fibre (iNDF240) and minerals. Metabolizable energy (ME) was then calculated from the concentrations of other nutrients. Regardless of the stage of regrowth, stems were located mainly in the bottom 1 or 2 strata, while leaves were present mainly in the top 2 or 3 strata. CP, ESC and ME declined, but aNDFom, ADF and iNDF240 increased with stage of regrowth and from top to bottom of the swards (P<0.05). While herbage quality variables were affected by both factors, vertical stratum had a much larger impact on quality than stage of regrowth. These results indicate that grazing management of kikuyu pastures should be based not only on stage of regrowth but also on level of defoliation, as both have strong impacts on the nutritive value of the consumed forage.
Centro Internacional de Agricultura Tropical (CIAT)
2020-05-30 18:22:22
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/488
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 2: May 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/490
2021-06-09T15:31:50Z
tgft:SC
"210130 2021 eng "
2346-3775
dc
Chlorophyll concentration and production of <i>Urochloa decumbens</i> treated with diazotrophic bacteria and thiamine in the Brazilian Cerrado
Vendruscolo, Eduardo Pradi
Universidade Estadual de Mato Grosso do Sul, Cassilândia, MS, Brazil. http://orcid.org/0000-0002-3404-8534
de Oliveira, Paulo Ricardo
Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, Brazil. https://orcid.org/0000-0001-6094-743X
Rodrigues, Aliny Heloísa Alcântara
Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, Brazil. https://orcid.org/0000-0002-3061-5730
Correia, Sávio Rosa
Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, Brazil.
Campos, Luiz Fernandes Cardoso
Escola de Agronomia, Universidade Federal de Goiás, Goiânia, GO, Brazil. https://orcid.org/0000-0001-5171-5194
Seleguini, Alexsander
Universidade Federal do Triângulo Mineiro, Iturama, MG, Brazil. http://orcid.org/0000-0002-5762-9278
de Lima, Sebastião Ferreira
Universidade Federal de Mato Grosso do Sul, Chapadão do Sul, MS, Brazil. https://ppgagronomiacpcs.ufms.br/ http://orcid.org/0000-0001-5693-912X
The effects of application of Azospirillum brasilense and thiamine on chlorophyll concentration and forage mass of Urochloa decumbens were evaluated in a small plot experiment conducted in Goiânia, Goiás, Brazil. The treatments were applications of: A. brasilense (concentration of 10 mL/L); thiamine at 2 concentrations: 50 and 100 mg/L; combinations of A. brasilense and thiamine at the 2 concentrations; and a Control treatment (untreated grass). At the first harvest there was a trend for applying A. brasilense, either alone or in combination with thiamine, to increase the concentrations of chlorophyll, but differences were not always significant at P<0.05. Dry mass of forage from applying A. brasilense plus thiamine at 100 mg/L was greater than that for Control and thiamine at both concentrations. At the second harvest, chlorophyll concentrations were not affected by treatment (P>0.05), while dry matter production of forage from applying A. brasilense alone and thiamine at 100 mg/L was greater (P<0.05) than that of Control and thiamine at 50 mg/L. Larger-scale and longer-term studies to validate these preliminary findings are needed.
Centro Internacional de Agricultura Tropical (CIAT)
2021-01-30 14:53:40
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/490
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 1 (2021): January 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/491
2022-08-04T14:01:29Z
tgft:SC
"200530 2020 eng "
2346-3775
dc
Evaluation of <i>Asystasia gangetica</i> as a potential forage in terms of growth, yield and nutrient concentration at different harvest ages
Kumalasari, N.R.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia. http://www.intp.fapet.ipb.ac.id https://orcid.org/0000-0002-7207-1145
Abdullah, L.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia. http://www.intp.fapet.ipb.ac.id
Khotijah, L.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia.
Wahyuni, L.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia.
Indriyani, Indriyani
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia.
Ilman, N.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia.
Janato, F.
Department of Nutrition and Feed Technology, Faculty of Animal Science, Bogor Agricultural University, Bogor, Indonesia.
The objective of this experiment was to analyze growth dynamics, yield and nutrient concentration of Asystasia gangetica (L.) T. Anderson at different harvest ages. A pot experiment was conducted at Green House Laboratory of Agrostology, Faculty of Animal Science, Bogor Agricultural University, Indonesia, during the growing season of 2018. Seedlings were transplanted into 115 polybags arranged in a completely randomized design with 23 replications. Plant height, number of leaves, number of branches, dry matter (DM) yields and nutrient concentrations at 30, 40, 50, 70 and 90 days after transplanting (DAT) were determined. Whereas plant height, number of leaves, number of branches and DM yields increased with age, nutrient concentrations followed different patterns. Crude protein % in leaf peaked at 24.2% at 40 DAT then decreased progressively to 8.4% at 90 DAT, while corresponding figures for stem were 10.6 and 2.8%, respectively. Crude fiber concentrations in leaf increased from 10.6% at 30 days to 17.3% at 90 days; corresponding figures for stem were 23.2 and 39.2%. From this pot study, cutting between 40 and 50 days after planting seemed to represent a suitable compromise between DM yield and protein percentage. Studies are needed to determine the repeatability of these results under field conditions and the regrowth potential of plants following harvesting.
Centro Internacional de Agricultura Tropical (CIAT)
2020-05-30 18:22:22
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/491
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 2: May 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/504
2021-06-09T15:35:33Z
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"210130 2021 eng "
2346-3775
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Hybrids of <i>Paspalum plicatulum</i> × <i>P. guenoarum</i>: Selection for forage yield and cold tolerance in a subtropical environment
Saraiva, Karla M.
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Dall'Agnol, Miguel
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
da Motta, Eder A.M.
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil. https://orcid.org/0000-0002-5942-5850
Pereira, Emerson A.
Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, RS, Brazil.
de Souza, Cleber H.L.
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Simioni, Carine
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Weiler, Roberto L.
Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Kopp, Maurício M.
Embrapa Pecuária Sul, Bagé, RS, Brazil. embrapa.
Schneider-Canny, Raquel
Noble Research Institute, Ardmore, USA.
Barbosa, Marlon R.
Instituto Nacional de Investigación Agropecuaria (INIA), Tacuarembó, Uruguay.
Selection of improved genotypes is important for pasture-based feeding systems in subtropical regions. Our goal was to identify hybrids of Paspalum with enhanced forage yield and cold tolerance across 2 sites [Bagé and Eldorado do Sul (ES)], in Rio Grande do Sul, Brazil. We evaluated 19 P. plicatulum × P. guenoarum hybrids, P. plicatulum genotype 4PT, P. guenoarum cultivars Azulão and Baio and, as Control, Megathyrsus maximus cv. Aruana. At both sites, the experimental design was a completely randomized block with 4 replications. Total dry mass (total-DM), leaf-DM and cold tolerance (ColdT) were recorded. At Bagé, hybrid 102069 produced higher total-DM and leaf-DM than the progenitors and cv. Aruana, while at ES, hybrids 102069 and 10308 produced higher total-DM than 4PT, Azulão and Aruana; hybrid 102069 had higher leaf-DM. At Bagé, 16 hybrids displayed ColdT similar to their progenitors and higher than Aruana, while at ES, 12 hybrids showed ColdT similar to Azulão and Baio and higher than 4PT and Aruana. This study demonstrated that hybrids of Paspalum with superior forage yield to their progenitors and Aruana, and hybrids with higher ColdT than 4PT and Aruana are in existence. The hybridization technique shows potential for producing alternative genotypes with higher forage yield and ColdT for sowing in subtropical regions.
Centro Internacional de Agricultura Tropical (CIAT)
2021-01-30 14:53:40
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/504
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 1 (2021): January 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/556
2021-06-02T20:56:41Z
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"191130 2019 eng "
2346-3775
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Growth characteristics, biomass yield and mineral concentrations in seven varieties of Napier grass (<i>Cenchrus purpureus</i>) at establishment in Kelantan, Malaysia
Rahman, Mohammad Mijanur
Faculty of Agro Based Industry, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Institute of Food Security and Sustainable Agriculture, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Syafieqa, Nurul Eizaty
Faculty of Agro Based Industry, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Diah, Nurul Aliah Binti Mohd
Faculty of Agro Based Industry, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Gondo, Takahiro
Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan.
Khalif, Raja Ili Arina Binti Raja
Faculty of Agro Based Industry, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Institute of Food Security and Sustainable Agriculture, Universiti Malaysia Kelantan, Kelantan, Malaysia.
Akashi, Ryo
Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan.
Growth characteristics, biomass yield and mineral concentrations were evaluated in a completely randomized design study of 7 Napier grass varieties. Data on tiller number per plant, plant height, leaf length, leaf width, stem diameter, leaf:stem ratio and dry matter (DM) yield, as well as concentrations of nitrogen, calcium, magnesium, phosphorus, sodium, potassium, zinc, copper, manganese and iron, were obtained at 2 months growth. The growth characteristics, DM yields and mineral concentrations (except phosphorus) varied significantly (P<0.01) among varieties. The variety Indian was tallest (221 cm) and produced the highest DM yield (6.3 t/ha), whereas Dwarf had the highest tiller number and leaf:stem ratio. Purple had the longest and Taiwan and Indian the widest leaves. Kobe, Pakchong and Purple had the greatest stem diameter. Concentrations of Ca, K and Na were greatest in Zanzibar, while Dwarf had the highest concentrations of N, Zn, Mn and Fe. Studies beyond the establishment phase over a range of seasons and in a range of environments at different ages of harvest are needed to confirm the merits of different Napier grass varieties in the study zone.
Centro Internacional de Agricultura Tropical (CIAT)
2019-11-30 00:00:00
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/556
Tropical Grasslands-Forrajes Tropicales; Vol. 7 No. 5: November 2019
eng
Copyright (c) 2019 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/564
2021-06-03T00:06:19Z
tgft:SC
"200530 2020 eng "
2346-3775
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Pest insects in natural and sown pastures of Paraguay
Sarubbi, Humberto J.
Facultad de Ciencias Agrarias, Universidad Nacional de Asunción, San Lorenzo, Paraguay. http://www.agr.una.py/
Ramírez, María B.
Facultad de Ciencias Agrarias, Universidad Nacional de Asunción, San Lorenzo, Paraguay.
Paraguayan livestock production is based mainly on the use of natural and sown pastures as basic cattle feed. Several genera of harmful insects reported in forage grasses can cause damage to both yield and quality of forage. A review of the insect collection of the Plant Protection Area of the Faculty of Agrarian Sciences, National University of Asunción was carried out, in order to prepare a list of insects with incidence in grasses. Then random sampling of different species of Poaceae showing insect damage in open areas of paddocks grazed by cattle was carried out during 2014‒2017 in all Regions of Paraguay. Thirteen different genera and species of pastures were collected and 20 species of insects were identified in the following orders: Hymenoptera (Formicidae family: 5 species); Isoptera (Termitidae: 3 species); Hemiptera (Cercopidae: 6 species; Lygaeidae: 1 species); Lepidoptera (Noctuidae: 2 species); and Orthoptera (Acrididae: 3 species). The most common forms of damage observed in pastures were: leaf consumption (25%), leaf cutting (25%) and leaf yellowing-drying (35%).
Centro Internacional de Agricultura Tropical (CIAT)
2020-05-30 18:22:22
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/564
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 2: May 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/568
2021-06-03T00:04:15Z
tgft:SC
"200530 2020 eng "
2346-3775
dc
In vitro digestion characteristics of various combinations of elephant grass hay, gliricidia hay or silage, soybean meal and corn meal in rations for sheep
Santana, Juliana Caroline Santos
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Morais, Jucileia Aparecida da Silva
Departamento de Zootecnia, Universidade Federal de Sergipe, Aracaju, SE, Brazil.
Difante, Gelson dos Santos
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Ítavo, Luís Carlos Vinhas
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil.
Gurgel, Antonio Leandro Chaves
Faculdade de Medicina Veterinária e Zootecnia, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brazil. https://orcid.org/0000-0001-5911-369X
Oliveira, Vinicius da Silva
Departamento de Zootecnia, Universidade Federal de Sergipe, Aracaju, SE, Brazil.
Rodrigues, Maria Juciara Silva Teles
Departamento de Zootecnia, Universidade Federal de Sergipe, Aracaju, SE, Brazil.
This study examined fermentation rates and kinetics of sheep rations based on combinations of elephant grass hay, gliricidia (Gliricidia sepium) hay or silage, soybean meal and corn meal using in vitro techniques. Three rations were prepared, namely: Control (elephant grass hay + soybean meal + corn meal); gliricidia hay (elephant grass hay + soybean meal + corn meal + gliricidia hay); and gliricidia silage (elephant grass hay + soybean meal + corn meal + gliricidia silage). A fixed ratio of roughage:concentrate of 55:45 was maintained for all rations, which were isocaloric and designed to support sheep gains of 200 g/day. The gliricidia replaced 57.6% of the soybean meal in the rations containing gliricidia and 81.8% of the elephant grass hay. Fermentation rates and kinetics, in vitro dry matter digestibility (IVDMD) and degradability of the rations were evaluated. Rations containing gliricidia as both hay and silage had higher (P<0.05) IVDMD than the Control ration (67.8 and 66.2 vs. 59.8%). The degradability of the ration containing gliricidia hay was higher (P<0.05) than that of the gliricidia silage ration (57.8 vs. 50.5%), whereas the Control showed an intermediate value (54.4%). The ration containing gliricidia hay and the Control produced more gas in the first 24 h than the ration containing gliricidia silage, and the gliricidia hay ration showed the shortest colonization time. Peak gas production occurred for the ration with gliricidia silage later than for the other rations. The study showed that substituting soybean meal with preserved gliricidia can result in higher digestibility of sheep rations. Feeding studies with animals are now warranted to verify these laboratory findings.
Centro Internacional de Agricultura Tropical (CIAT)
2020-05-30 18:22:22
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/568
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 2: May 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/666
2022-08-04T14:19:37Z
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"210930 2021 eng "
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Effects of plant spacing and fertilizer level on forage yield and chemical composition of hybrid <i>Urochloa</i> cv. Mulato II grass during the first 150 days of growth under irrigation supplementation, in Chagni Ranch, Awi Zone, Ethiopia
Tadesse, Wondimagegn
Department of Animal Production and Technology, College of Dry Land Agriculture, Kebri Dehar University, Kebri Dehar, Ethiopia.
Alemu, Berhanu
Department of Animal Science, College of Agriculture and Natural Resources, Debre Markos University, Debre Markos, Ethiopia.
Addis, Mesganaw
Department of Animal Science, College of Agriculture and Natural Resources, Debre Markos University, Debre Markos, Ethiopia.
A study was conducted to evaluate the effects of plant spacing and N fertilizer application on dry matter yield and chemical composition of Urochloa hybrid cv. Mulato II grass for the first 150 days after planting. A factorial experiment with 3 urea fertilizer levels (0, 50 and 100 kg/ha) and 4 spacings between plants and rows (20 × 20, 30 × 40, 40 × 60 and 50 × 80 cm) with 3 replications was used. Data collected were dry matter yield (DMY), leaf:stem ratio and chemical analyses, i.e. crude protein (CP), ash, neutral detergent fiber (NDF), acid detergent fiber (ADF) and acid detergent lignin (ADL) concentrations. Results indicated that DMY, leaf:stem ratio, CP%, NDF% and ADF% were significantly (P<0.05) affected by interactions between plant spacing and fertilizer level. However, ash and ADL were significantly (P<0.05) affected only by main effects. The highest DMYs (9.18 t/ha and 8.93 t/ha) were recorded for narrowest plant spacing (20 × 20 cm) with higher urea fertilizer level (100 kg/ha) and narrowest plant spacing (20 × 20 cm) with medium urea fertilizer level (50 kg/ha), respectively. CP% ranged from 14.6 to 20% and leaf:stem ratio from 1.12 to 1.82:1. Similar studies need to be conducted over longer periods to determine to what extent these findings relate to performance over the life of a permanent pasture.
Centro Internacional de Agricultura Tropical (CIAT)
2021-09-30 18:04:34
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/666
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 3 (2021): September 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/691
2022-08-04T14:20:28Z
tgft:SC
"200930 2020 eng "
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dc
Terra Ronca State Park: A potential natural <i>Cratylia argentea</i> (Desv.) Kuntze conservation area in Goiás, Brazil
Mattar, Eduardo Pacca Luna
Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, AC, Brazil. https://orcid.org/0000-0001-9202-9879
Matrangolo, Walter José Rodrigues
Embrapa Milho e Sorgo, Sete Lagoas, MG, Brazil.
Brasileiro, Bruno Portela
Departamento de Produção Vegetal, Universidade Federal do Paraná, Curitiba, PR, Brazil.
Frade Junior, Elizio Ferreira
Centro de Ciências Biológicas e da Natureza, Universidade Federal do Acre, Rio Branco, AC, Brazil.
Albuquerque, Thais Aguiar de
Veterinarian, Valinhos, SP, Brazil.
Oliveira, João Ricardo de
Instituto Nacional de Colonização e Reforma Agrária, Rio Branco, AC, Brazil.
de Paula-Souza, Juliana
Departamento de Botânica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil.
Dias, Denise Cunha Fernandes dos Santos
Departamento de Produção Vegetal, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Cratylia argentea (cratília) is a neo-tropical leguminous plant with high resprouting ability, showing great potential as both an animal feed and to fertilize the soil through its N-fixing ability. During scientific expeditions carried out in 2016 to identify and collect germplasm in different states of Brazil, the Terra Ronca State Park (PETeR) stood out as a potential conservation area for this species. There, cratília is well adapted to the dry season, retaining green leaves even during extended dry periods and was found to develop a shrub or climbing habit, depending on light conditions. In the traditional cattle production systems of the region livestock readily consume cratília, making it an important asset for local inhabitants. Based on several populations identified and collected in PETeR, the value of traditional knowledge and use of cratília is discussed as is the potential role of the Park as an in situ conservation unit.
Centro Internacional de Agricultura Tropical (CIAT)
2020-09-30 19:22:59
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/691
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 3 (2020): September 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/748
2022-08-04T14:23:17Z
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"200930 2020 eng "
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Establishing <i>Cratylia argentea</i> in an Ultisol in the West of Acre, Southwestern Amazon, Brazil
Aquino, Antônio Marcos de Souza
Boa Esperança Ranch, Santa Luzia Settlement Project, Cruzeiro do Sul, Acre, Brazil.
Mattar, Eduardo Pacca Luna
Universidade Federal do Acre, Programa de Pós-Graduação em Ciência Florestal, Rio Branco, AC, Brazil. https://orcid.org/0000-0001-9202-9879
Farinatti, Luís Henrique Ebling
Universidade Federal do Acre, Campus Floresta, Cruzeiro do Sul, AC, Brazil.
da Cruz, Leandro Roberto
Universidade Estadual de Mato Grosso do Sul, Dourados, MS, Brazil.
Costa, Alen Patric de Oliveira
Universidade Federal do Acre, Rio Branco, AC, Brazil.
Frade Junior, Elizio Ferreira
Universidade Federal do Acre, Programa de Pós-Graduação em Ciência Florestal, Rio Branco, AC, Brazil.
Araújo, Edson Alves de
Universidade Federal do Acre, Campus Floresta, Cruzeiro do Sul, AC, Brazil.
Matrangolo, Walter Jose Rodrigues
Embrapa Milho e Sorgo, Sete Lagoas, MG, Brazil.
Cratylia argentea is a multi-purpose shrub with potential as a source of protein for livestock, but is rarely used in production units. This study aimed to monitor the establishment of a stand of this plant in a sandy Ultisol (Red-Yellow Argisol), in an area of 4,000 m2 on a rural property in Cruzeiro do Sul, Acre, Brazil, comparing 2 planting methods: (i) transplanting seedlings (78 in total); and (ii) direct seeding (3,820 seeds in 1,910 pits). The existing pasture was sprayed with glyphosate before planting C. argentea. Subsequently, herbicide and mechanical methods were used to control weeds, while fertilizer was applied and the area was mulched. In the first year after planting, activities performed and inputs were recorded along with costs in order to create a reference model for those intending to cultivate this species in the humid tropics. At 10 months after planting, average height of plants was 162 cm (range 70‒240 cm) with no effect of planting method. Ninety-seven per cent of plants established from seedlings survived, while 81% of pits established from direct seeding in the field had surviving plants. The cost of establishing a hectare of C. argentea was US$ 1,654.17, with 85.8% of the cost for labor and only 14.2% for other inputs, although costs of producing seedlings and hand-planting them were not considered. Studies to develop planting systems using less labor seem warranted.
Centro Internacional de Agricultura Tropical (CIAT)
2020-09-30 19:22:59
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/748
Tropical Grasslands-Forrajes Tropicales; Vol. 8 No. 3 (2020): September 2020
eng
Copyright (c) 2020 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/767
2021-09-30T18:49:36Z
tgft:SC
"210930 2021 eng "
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What drives the adoption of fodder innovation(s) in a smallholder dairy production system? Evidence from a cross-sectional study of dairy farmers in India
Thirunavukkarasu, D.
Krishi Vigyan Kendra, Kallakurichi, Tamil Nadu Veterinary and Animal Sciences University, Tamil Nadu, India. http://orcid.org/0000-0002-3360-1908 http://orcid.org/0000-0002-3360-1908
Narmatha, N.
Department of Veterinary and Animal Husbandry Extension Education, Veterinary College and Research Institute, Tamil Nadu Veterinary and Animal Sciences University, Namakkal DT, Tamil Nadu, India.
Alagudurai, S.
Krishi Vigyan Kendra, Kallakurichi, Tamil Nadu Veterinary and Animal Sciences University, Tamil Nadu, India.
The study in India involving 384 households found that 42.7% of dairy farmers adopted new forage varieties when varieties were released. The farmer’s resources, their caste, access to markets for milk and price received for milk had positive effects on the decision to adopt. Management of farms by women had negative effects on the adoption decision. Increased forage yield and ease of propagation and establishment were important reasons for adoption of varieties, e.g. the relative advantage of pearl millet × Napier grass (Cenchrus americanus × C. purpureus) vs. hedge lucerne (Desmanthus virgatus). Thus, researchers need to address these issues when developing new germplasm, if farmers are to readily adopt new varieties, especially in the case of resource-poor farmers.
Centro Internacional de Agricultura Tropical (CIAT)
2021-09-30 18:04:34
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/767
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 3 (2021): September 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/845
2022-05-31T16:33:38Z
tgft:SC
"220131 2022 eng "
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Nutritive value of forages and diets in some small-scale dairy farms in Kiambu County, Kenya in the short rains season
Crovetto, Gianni Matteo
Dipartimento di Scienze Agrarie e Ambientali, Università degli Studi di Milano Statale, Milano, Italy.
Magnoli, Francesco
Dipartimento di Scienze Agrarie e Ambientali, Università degli Studi di Milano Statale, Milano, Italy.
Chiaravalli, Maria
Dipartimento di Scienze Agrarie e Ambientali, Università degli Studi di Milano Statale, Milano, Italy.
Njeru, Timoty
Caritas Nairobi, Nairobi, Kenya.
Gitau, Jhon Waweru
Caritas Nairobi, Nairobi, Kenya.
Colombini, Stefania
Dipartimento di Scienze Agrarie e Ambientali, Università degli Studi di Milano Statale, Milano, Italy.
Sixteen selected small-scale dairy farms were investigated in Kiambu County (Kenya) during the short rains season
to develop a snapshot of the types of rations fed, milk yields obtained and sources of fodder. On average farmers had
1 ha of land and 2.2 lactating cows yielding 8.93 kg milk/cow/d with feed intake of 10.5 kg DM/d. Only 35% of feed
consumed was produced on farm. Boma Rhodes grass hay and green Napier grass were the main forage components
(37.9 and 28.3% of total DM). Protein forages used were the herbaceous legumes lucerne and desmodium (19.9 and
15.9% CP, respectively) and leguminous shrubs (Leucaena, Calliandra and Sesbania with 21.1% CP and 43.4%
aNDFom, on average). Grasses had higher aNDFom digestibility (47.1%) than legumes (39.7%). Napier grass, Boma
Rhodes grass, lucerne and desmodium had fiber digestibility of 51.9, 48.6, 46.8 and 32.6%, respectively. The energy
and protein balances (actual vs. requirements) of the cows were on average -19.3 and -16.4%, respectively, indicating
that cows utilized body tissues to produce the levels of milk obtained. Mutiple correspondence analysis showed that a
milk yield higher than 9.1 kg/d was associated with a level of Boma Rhodes grass <5 kg DM/d, concentration of nonfibrous carbohydrates in the diet >22.0% (DM basis), concentrate level >2.63 kg/cow/d and CP% in the ration >9.1%. To improve milk yields during this season farmers should harvest grass forage at a younger age, include leguminous forage in the diets and increase the level of concentrates fed. These strategies should be demonstrated on farms to show possible benefits.
Centro Internacional de Agricultura Tropical (CIAT)
2022-01-31 11:38:41
shortCommunications
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https://www.tropicalgrasslands.info/index.php/tgft/article/view/845
Tropical Grasslands-Forrajes Tropicales; Vol. 10 No. 1 (2022): January 2022
eng
Copyright (c) 2022 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/854
2021-08-04T18:24:17Z
tgft:SC
"210531 2021 eng "
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Studies with <i>Urochloa brizantha</i> cv. MG5 Vitória in Okinawa, Japan: Vegetative propagation and a tractor tyre stress test
Hanagasaki, Takashi
Okinawa Livestock Research Center, Nakijin, Okinawa, Japan. https://www.pref.okinawa.jp/site/norin/chikuken/ http://orcid.org/0000-0002-4151-8506
Feeding of high quality grass is critical to ensure breeding cows remain healthy with high reproductive rates and growing and fattening cattle achieve good growth rates. The Brazilian grass cultivar, Urochloa brizantha cv. MG5 Vitória, is highly nutritious and is known for its drought tolerance. In view of its low seed production potential in subtropical Japan and of phytosanitary problems (contamination with soil particles) of imported seed, a study was conducted in Okinawa to assess 2 methods of propagating this cultivar vegetatively. Cutting stems (culms) at about 10 cm from ground level and inserting them 3 cm into a 50:50 compost:soil mixture produced a 77% success rate in terms of rooted plantlets in a glasshouse compared with 67% for cutting the culm at 3 nodes from the base, subsequently allowing 2 weeks for adventitious roots to form on the lowest node, then cutting below the node where roots emerged and planting the rooted propagule in the same mixture. It seems that the simple process of cutting stems at about 10 cm from ground level and inserting them into a suitable mixture of soil and compost should result in an acceptable yield of plantlets for establishment of an MG5 forage crop. However, locating a source of high-quality seed free of phytosanitary problems seed would seem to be a better solution to increase the areas in Okinawa planted to MG5.
In the tractor tyre stress trial conducted over 2 years, an MG5 forage crop established from seed showed depressed yields on the treatment subjected to tractor tyre pressure but performed as well as Chloris gayana, a much-used forage grass in Okinawa.
Centro Internacional de Agricultura Tropical (CIAT)
2021-05-31 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/854
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 2 (2021): May 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/860
2021-09-30T18:49:36Z
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"210930 2021 eng "
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Use of remote sensors to determine forage availability in grazed pastures of <i>Urochloa humidicola</i> cv. Llanero in the Colombian Altillanura
Díaz Giraldo, Raúl Alejandro
https://www.agrosavia.co/ https://orcid.org/0000-0001-7438-0526
Álvarez de León, Mauricio
Corporacion Colombiana de Investigacion Agropecuaria https://www.agrosavia.co/ https://orcid.org/0000-0002-4337-6513
Pérez López, Otoniel
https://www.agrosavia.co/ https://orcid.org/0000-0001-8236-9845
La modernización de los sistemas pastoriles basados en pasturas del género Urochloa en los Llanos Orientales de Colombia requiere de técnicas que usan sensores remotos desde plataformas satelitales para estimar la oferta de forraje. En el C.I. Carimagua de la Corporación Colombiana de Investigación Agropecuaria (Agrosavia) se evaluó una pastura de Urochloa humidicola cv. Llanero con imágenes Landsat 8 y Sentinel 2A. Se utilizaron los índices de vegetación NDVI, SAVI, EVI y GNDVI, calculados a partir de las bandas azul, verde, rojo e infrarrojo cercano. Los resultados fueron analizados con el software de estadística R y se compararon con el aforo (= mediciones en campo) del forraje disponible bajo pastoreo en época seca. El aforo fluctuó entre 290 y 656 kg MS/ha y los índices de vegetación fueron, para los sensores Landsat 8 y Sentinel 2A, respectivamente: NDVI = 0.67 (±0.037) y 0.69 (±0.061); SAVI = 0.48 (±0.048) y 0.41 (±0.046); EVI = 0.70 (±0.052) y 0.41 (±0.047); y GNDVI = 0.60 (±0.028) y 0.70 (±0.034). La relación entre los índices de vegetación con la oferta de forraje fue lineal directa; para la valoración de los modelos predictivos se usaron los criterios coeficiente de determinación R2 (0.56‒0.72) y el error cuadrático medio (RMSE) (63.95‒80.16) de las ecuaciones de regresión. Se concluye que para las condiciones del estudio el EVI (para Landsat 8) y el NDVI (para Sentinel 2A) son índices apropiados para predecir la oferta forrajera del pasto Llanero.
Centro Internacional de Agricultura Tropical (CIAT)
2021-09-30 18:04:34
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/860
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 3 (2021): September 2021
spa
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/890
2021-09-30T18:49:37Z
tgft:SC
"210930 2021 eng "
2346-3775
dc
The effects of increasing concentrations of <i>Trichanthera gigantea</i> leaves in pellets on the nutritive value and short-term intake of diets of grass plus pellets offered to lambs reared under tropical conditions in the Caribbean
Jack, H. A.
School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
Caribbean Agricultural Research and Development Institute, St Augustine, Trinidad and Tobago.
Cranston, L. M.
School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
Burke, J. L.
Knights, M.
Biosciences, Agriculture & Food Technologies, University of Trinidad and Tobago, Centeno, Trinidad and Tobago.
Morel, P. C. H.
School of Agriculture and Environment, Massey University, Palmerston North, New Zealand.
There is currently limited information on the benefits of increasing the concentration of Trichanthera gigantea leaves in pelleted diets offered to lambs reared under tropical conditions in the Caribbean. Twelve crossbred Barbados Blackbelly rams aged 5 months were used to determine the effects of increasing the concentrations of T. gigantea in pelleted diets, on the nutritive value and intake of grass forage plus pellets offered to lambs. Animals were randomly assigned to a basic diet (4 kg) of chopped Cenchrus purpureus plus 1 of 6 pelleted diets (500 g) comprised of either 100% intact commercial pellets or a pelleted mixture of ground commercial pellets and ground (dry fallen) T. gigantea leaf in the following ratios (T. gigantea leaves:ground commercial pellets): 20:80 (T20); 40:60 (T40); 60:40 (T60); 80:20 (T80); and 100:0 (T100). Total intakes of forage and pellets (TPI) were measured at the end of each day during a period of 7 days, and the average daily nutrient intakes of the different treatment diets were calculated. Overall, there was no significant difference in the intakes of pellets containing 0 to 80% T. gigantea leaves (P>0.05) but intakes of pellets comprising 100% T. gigantea leaves were significantly lower (P<0.0001). Both CP and soluble protein intakes declined progressively as the percentage of T. gigantea leaves in the pellets increased. While level of T. gigantea leaves in pellets fed to lambs did not generally affect total intakes of pellets, grass, or grass+pellets, animal performance on these various rations cannot be assumed to be similar until longer-term feeding studies have been performed, as reduced protein and energy concentrations in the pellets could significantly lower weight gains as level of leaf in the pellets increased.
Centro Internacional de Agricultura Tropical (CIAT)
2021-09-30 18:04:34
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/890
Tropical Grasslands-Forrajes Tropicales; Vol. 9 No. 3 (2021): September 2021
eng
Copyright (c) 2021 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/898
2022-10-03T19:54:26Z
tgft:SC
"220930 2022 eng "
2346-3775
dc
Effects of feeding dried olive (<i>Olea europaea</i>) leaves with wheat strawconcentrate rations on feed conversion efficiency in Awassi rams
Alomar, Mazen
Atomic Energy Commission of Syria
Al-Masri, M. Rateb
Atomic Energy Commission of Syria
Zarkawi, Moutaz
Atomic Energy Commission of Syria
Three groups of Awassi rams were fed for 6 weeks either a conventional wheat straw-concentrate ration (Control) or 2 experimental rations, where 30 (G1) and 60% (G2) of the wheat straw was replaced with dried olive leaves following oil extraction. All rations were isocaloric and isonitrogenous. Feed intake (FI), bodyweight gain (BWG) and feed conversion efficiency (FCE) were measured. BWG and FI during the 6-week period were not significantly (P>0.05) different for the different rations, averaging 4.75 and 116 kg/animal, respectively. In addition, there were no significant (P>0.05) differences in FCE values between the Control and experimental groups fed wheat straw + olive leaves, averaging 24.6 kg feed/kg gain. These results suggest that dried olive leaves can replace wheat straw in wheat straw-concentrate rations at levels up to 60% without affecting performance. Further studies are needed to determine optimal combinations of straw, olive leaves and concentrate to achieve different goals as well as intakes and performance when offered rations ad lib. Economic assessments would determine if including olive leaves would reduce the costs of feeding.
Centro Internacional de Agricultura Tropical (CIAT)
2022-09-30 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/898
Tropical Grasslands-Forrajes Tropicales; Vol. 10 No. 3 (2022): September 2022
eng
Copyright (c) 2022 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/919
2022-05-31T16:33:38Z
tgft:SC
"220131 2022 eng "
2346-3775
dc
Phenotypic and genetic variability induced in Lehmann’s love grass (<i>Eragrostis lehmanniana</i>) through gamma irradiation
Álvarez-Holguín, Alan
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP). Aldama, CHH, México. https://www.gob.mx/inifap https://orcid.org/0000-0001-5719-3032
Morales-Nieto, Carlos R.
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahua. Chihuahua, CHH. México. http://fz.uach.mx/ https://orcid.org/0000-0003-3355-6075
Avendaño-Arrazate, Carlos H.
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias (INIFAP). Aldama, CHH, México. https://www.gob.mx/inifap https://orcid.org/0000-0003-3591-2280
Corrales-Lerma, Raúl
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahua. Chihuahua, CHH. México. http://fz.uach.mx/ https://orcid.org/0000-0001-8499-0029
Villarreal-Guerrero, Federico
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahua. Chihuahua, CHH. México. http://fz.uach.mx/ https://orcid.org/0000-0001-7217-5713
This study assessed the morphological and nutritional diversity induced through gamma irradiation in Lehmann’s
love grass. Seed were irradiated at doses of 0, 100, 200, 300, 450, 600, 900, and 1400 Gy. Ten agronomic traits related
with forage quality were evaluated and used to select the mutants, which were confirmed by cluster analysis and
multivariate analysis of variance and then characterized by nutritional and molecular characterization. Mutants with
16–20% less (p<0.05) lignin and 36–68% more protein content than the control genotype were found. Genetic distances of 0.38 and 0.49 also revealed differences (p<0.05) between the mutants and control genotype. The phenotypic and genetic variability, induced through gamma irradiation, resulted in the identification of two first generation mutants with outstanding agronomic traits and nutritional quality.
Centro Internacional de Agricultura Tropical (CIAT)
2022-01-31 11:38:41
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/919
Tropical Grasslands-Forrajes Tropicales; Vol. 10 No. 1 (2022): January 2022
eng
Copyright (c) 2022 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/940
2022-05-31T16:35:37Z
tgft:SC
"220531 2022 eng "
2346-3775
dc
Evaluation of auxin and cytokinin use for vegetative propagation of <i>Asystasia gangetica</i> for forage production
Kumalasari, Nur Rochmah
Department of Nutrition and Feed Technology, Faculty of Animal Nutrition, IPB University https://orcid.org/0000-0002-7207-1145
Abdullah, Luki
Department of Nutrition and Feed Technology, Faculty of Animal Nutrition, IPB University
Khotijah, Lilis
Department of Nutrition and Feed Technology, Faculty of Animal Nutrition, IPB University
Indriyani, Indriyani
Department of Nutrition and Feed Technology, Faculty of Animal Nutrition, IPB University
Ilman, Nurul
Department of Nutrition and Feed Technology, Faculty of Animal Nutrition, IPB University
The aim of the experiment was to determine the effects of auxin and cytokinin application on vegetative propagation of Asystasia gangetica for forage production. Stem cuttings were treated with 9 different hormone levels; control (without hormone), immersion of ends of cuttings in 50, 100, 150, and 200 ppm solutions of auxin (indole 3-acetic acid) and immersion of ends of cuttings in 50, 100, 150, and 200 ppm solutions of cytokinin (benzyl amino purine) for 15 minutes, followed by planting in plastic trays. After 21 days, cuttings were transplanted into soil in polybags in the greenhouse. Forage was harvested 50 days after transplanting to determine yield and quality. The results showed that hormones affected plant height, leaf number, primary branch number, tertiary branch number, yield and nutritional value. It can be concluded that plant hormones can be used for vegetative propagation of A. gangetica as forage.
Centro Internacional de Agricultura Tropical (CIAT)
2022-05-31 16:28:28
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/940
Tropical Grasslands-Forrajes Tropicales; Vol. 10 No. 2 (2022): May 2022
eng
Copyright (c) 2022 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/1067
2022-05-31T16:35:38Z
tgft:SC
"220531 2022 eng "
2346-3775
dc
Economic results of the use of Tithonia diversifolia fodder meal in the diet of different poultry categories
Báez Quiñones, Nadia
http://orcid.org/0000-0001-6499-206X
Rodríguez, Bárbara
http://orcid.org/0000-0003-0740-9346
Ruíz, Tomás Elias
http://orcid.org/0000-0002-1690-1140
Vázquez, Ysnagmy
http://orcid.org/0000-0003-1769-3416
Díaz Rodríguez, Humberto
El presente estudio evaluó económicamente el empleo de harina de forraje de tithonia (Tithonia diversifolia) en dietas de pollos de engorde, reemplazo de ponedoras y gallinas ponedoras, en sustitución parcial de las harinas de maíz y soya. Se tomaron los datos experimentales del Instituto de Ciencia Animal durante los años 2018–2021. Se tuvo en cuenta los costos directos involucrados en el establecimiento de esta planta y la elaboración de la harina. Se estimaron los costos totales de alimentación, por animal, por kg de ganancia, por tonelada de peso vivo producido, por mil huevos y por kg de huevo, para los diferentes tratamientos (Testigo 0%; T1-5%; T2-10%; T3-15% y T4-20% de inclusión de harina de tithonia en la ración). En todos los casos, los costos de alimentación disminuyeron a medida se incrementó la inclusión de la harina de tithonia. Los mejores resultados en pollos de engorde (7 a 42 días) se obtuvieron con T3, con un 14.78% de disminución en costos por kilogramo de ganancia de peso; con T4 en reemplazo de ponedoras (semanas 9 a 18), con 20.94% de disminución en costos de alimentación por animal; y con T3 en ponedoras (semanas 23 a 44) con 19.34% de disminución en costos por millar de huevos producidos. Se demuestra que la sustitución parcial de harinas de maíz y soya por harina de forraje de tithonia en la dieta de estas especies constituye una alternativa productiva y económicamente viable, más aún que se trata de un recurso alimenticio de producción local, por lo que puede contribuir a sustituir importaciones de materias primas tradicionales y altamente costosas.
Centro Internacional de Agricultura Tropical (CIAT)
2022-05-31 16:28:28
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/1067
Tropical Grasslands-Forrajes Tropicales; Vol. 10 No. 2 (2022): May 2022
spa
Copyright (c) 2022 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/1160
2023-02-02T15:19:02Z
tgft:SC
"230201 2023 eng "
2346-3775
dc
Economic analysis of the production of gamic seed of Tithonia diversifolia (Hemsl.) Gray in Cuba
Báez Quiñones, Nadia
https://orcid.org/0000-0001-6499-206X
Padilla, César
https://orcid.org/0000-0002-6794-8694
Rodríguez García, Idalmis
http://orcid.org/0000-0001-5897-5431
Ruíz, Tomás E.
https://orcid.org/0000-0002-1690-1140
La Tithonia diversifolia es una de las plantas proteicas más aceptada por los ganaderos en Cuba para alimentar a los animales. Encontrar una alternativa económica para fomentar sistemas de producción con esta planta es vital para disminuir los costos asociados a la plantación e indirectamente en la alimentación, por lo que el objetivo de este trabajo fue determinar qué método de propagación (por semilla vegetativa o gámica) de tithonia resulta económicamente más factible para la producción de semilla gámica en las condiciones de Cuba. Se determinaron las fichas de costo de la producción de semilla gámica de tithonia a partir de plantaciones por vía asexual. Luego, a partir de este valor se determinó el costo de producción de la semilla gámica sembrada por vía sexual. El costo de producción de la semilla gámica fue de 15.07 USD/kg cuando se sembró con material vegetativo, y de 11.04 USD/kg cuando se usó semilla gámica. Se demuestra que el costo de establecimiento de una hectárea de tithonia para la producción de semillas se reduce hasta 3 veces cuando se parte del uso de semilla gámica, comparado al uso de semilla vegetativa (US$ 142.13 vs 472.05, respectivamente).
Centro Internacional de Agricultura Tropical (CIAT)
2023-02-01 00:00:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/1160
Tropical Grasslands-Forrajes Tropicales; Vol. 11 No. 1 (2023): January 2023
spa
Copyright (c) 2023 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/1165
2023-09-30T14:27:28Z
tgft:SC
"230930 2023 eng "
2346-3775
dc
Nitrogen fertilization effects on forage production and nutritive value of 4 tropical grasses on alkaline soils in Argentina
Mattera, Juan
Estación Experimental Agropecuaria Pergamino, Instituto Nacional de Tecnología Agropecuaria. Buenos Aires, Argentina https://orcid.org/0000-0001-9049-7230
Romero, Luis Alberto
Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria. Santa Fé, Argentina https://orcid.org/0000-0001-7819-9265
Iacopini, María Lorena
Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria. Santa Fé, Argentina. https://orcid.org/0000-0003-0778-1818
Gaggiotti, Mónica
Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria. Santa Fé, Argentina. https://orcid.org/0000-0001-9927-3604
Cuatrín, Alejandra Lorena
Estación Experimental Agropecuaria Paraná, Instituto Nacional de Tecnología Agropecuaria. Entre Ríos, Argentina. https://orcid.org/0000-0001-7327-6110
Tomás, María Andrea
Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria. Santa Fé, Argentina. https://orcid.org/0000-0001-6078-7763
This study evaluated effects of nitrogen (N) fertilization and gypsum application and their interactions on total pasture forage production and nutritive values of Chloris gayana cultivars ‘Santana’ and ‘Finecut’ and Panicum coloratum cultivars ‘Klein’ and ‘Bambatsi’ growing in a moderately sodic soil (Typic Natracualf) in northcentral Santa Fe Province of Argentina over 3 years. Sown pasture forage production differed among cultivars. C. gayana cultivar ‘Finecut’ produced more forage biomass than the other 3 cultivars. P. coloratum cultivars were superior to C. gayana cultivars for nutritive value, showing lower NDF and ADF. N fertilization strongly increased forage production, total biomass and sown pasture biomass with improved crude protein content and improvement in plant N status. Addition of gypsum did not affect forage production and nutritive value. This research showed the feasibility to improve production and nutritive value of tropical pastures in subtropical areas by species/cultivar selection and N fertilization.
Centro Internacional de Agricultura Tropical (CIAT)
2023-09-30 14:27:00
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/1165
Tropical Grasslands-Forrajes Tropicales; Vol. 11 No. 3 (2023): September 2023
eng
Copyright (c) 2023 Tropical Grasslands-Forrajes Tropicales
oai:oai.tropicalgrasslands.info:article/1303
2024-01-31T20:22:23Z
tgft:SC
"240131 2024 eng "
2346-3775
dc
Morpho-productive characterization of Tithonia diversifolia accessions collected in the state of Chiapas, Mexico
Alonso, Jatnel
Instituto de Ciencia Animal
Grajales Zepeda, Reynol
Hernandez Lopez, Roque
Peres Soto, Lorenzo
Castro Hernandez, Lazaro
Reyes Gracia, Maria Erendida
Tithonia diversifolia se ha difundido en los sistemas de producción animal en América Latina, pero las investigaciones muestran que existe gran variabilidad genética entre los materiales silvestres recolectados. El objetivo de este trabajo fue caracterizar morfológica y productivamente materiales de T. diversifolia recolectados en el noreste del estado Chiapas (México). Las recolectas incluyeron semillas y esquejes. Con las semillas se realizó un bioensayo de germinación y con los esquejes un experimento en campo con evaluaciones a los 90, 120 y 150 días de crecimiento. En ambos casos se utilizó un diseño completamente aleatorizado con tres y 13 repeticiones, respectivamente. Se recolectaron 34 materiales y se georreferenciaron las localidades de su procedencia. Doce presentaron semillas al momento de la recolecta. Todas las semillas mostraron capacidad germinativa. El mayor porcentaje de germinación (32.7 %) lo alcanzó el material # 32 mientras que el # 33 mostró el menor valor (0.7 %). El 50 % de los materiales recolectados tuvieron un índice de velocidad de emergencia (IVE) superior a 0.5, pero cinco no se reprodujeron en campo. Los materiales # 24 y 29 alcanzaron mayor altura y número de hojas por planta. El grupo con mayor producción de materia verde por planta (10.29 kg) estuvo conformado por los materiales # 14 y # 24. Las variables morfológicas y productivas posibilitaron conformar tres grupos de materiales vegetales los cuales se pueden introducir en diferentes alternativas para la producción animal en el estado de Chiapas (México).
Centro Internacional de Agricultura Tropical (CIAT)
2024-01-31 20:22:15
shortCommunications
application/pdf
https://www.tropicalgrasslands.info/index.php/tgft/article/view/1303
Tropical Grasslands-Forrajes Tropicales; Vol. 12 No. 1 (2024): January 2024
spa
Copyright (c) 2024 Tropical Grasslands-Forrajes Tropicales