Emergencia de plántulas de especies de pasto perennes tropicales en respuesta a la temperatura utilizada para determinar recomendaciones de época de siembra

Autores/as

  • Marja Simpson NSW Department of Primary Industries, Orange Agricultural Institute. Australia
  • Suzanne Patricia Boschma NSW Department of Primary Industries, Tamworth Agricultural Institute. Australia
  • Yohannes Alemseged NSW Department of Primary Industries, Trangie Agricultural Research Centre. Australia
  • Matthew Thomas Newell NSW Department of Primary Industries, Cowra Agricultural Institute. Australia
  • Mark Roger Norton NSW Department of Primary Industries, Wagga Wagga Agricultural Institute. Australia
  • Warren John Smith NSW Department of Primary Industries, Trangie Agricultural Research Centre. Australia
  • Mark Andrew Brennan NSW Department of Primary Industries, Tamworth Agricultural Institute. Australia
  • Neil Munday NSW Department of Primary Industries, Orange Agricultural Institute. Australia
  • Steve Harden NSW Department of Primary Industries, Tamworth Agricultural Institute. Australia
  • Andrew Price NSW Department of Primary Industries, Wagga Wagga Agricultural Institute. Australia

DOI:

https://doi.org/10.17138/tgft(11)198-209
Resumen Referencias bibliográficas Cómo citar

Resumen

Las gramíneas y leguminosas de pastos tropicales pueden ser altamente productivas y persistentes, llenando la falta de alimentos en verano y otoño típico de los sistemas de pasturas templadas en el sur de Australia. Sin embargo, se necesita más información sobre el rango óptimo de temperatura para la emergencia de plántulas, ya que esto influirá en las recomendaciones sobre la época de siembra. Con ese propósito se condujo un experimento de campo replicado en 5 ubicaciones en Nueva Gales del Sur, durante un período de 12 meses, para determinar la temperatura óptima para la emergencia de un grupo de especies tropicales: pasto Rhodes (Chloris gayana Kunth), pasto Makarikari (Panicum coloratum L. var. makarikariense Gooss.), pasto kikuyu (Cenchrus clandestinus (Hochst. ex Chiov.) Morrone), pasto pangola (Digitaria eriantha Steud.), pasto guinea (Megathyrsus maximus (Jacq.) B.K. Simon & S.W.L. Jacobs), paspalum (Paspalum dilatatum Poir.), híbrido de Urochloa (Urochloa decumbens × U. ruziziensis × U. brizantha), 2 cultivares de Desmanthus virgatus (L.) Willd. (cultivares 'Marc' y 'JCU2'), D. bicornutus (S. Watson), D. leptophyllus (Kunth) y D. pernambucanus (L.) Thell.). El pasto Rhodes emergió de manera satisfactoria durante un período más largo en todos los sitios, exhibiendo el mayor rango de temperatura en el que ocurrió la emergencia, mientras que el pasto Makarikari y el pasto guinea tuvieron el rango de temperatura más estrecho para la emergencia. La temperatura para el 50% de la emergencia difirió entre las especies tropicales y si los suelos se estaban calentando o enfriando. El pasto Rhodes tuvo la temperatura de emergencia del 50% más baja (17 °C), mientras que el paspalum tuvo la más alta (22 °C). Los resultados mostraron que la temperatura para el 50% de la emergencia es un indicador útil para determinar la época de siembra en suelos que se están calentando.

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Cómo citar

Simpson, M., Boschma, S. P., Alemseged, Y., Newell, M. T., Norton, M. R., Smith, W. J., Brennan, M. A., Munday, N., Harden, S., & Price, A. (2023). Emergencia de plántulas de especies de pasto perennes tropicales en respuesta a la temperatura utilizada para determinar recomendaciones de época de siembra. Tropical Grasslands-Forrajes Tropicales, 11(3), 198–209. https://doi.org/10.17138/tgft(11)198-209

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Publicado

2023-09-30

Número

Vol. 11 Núm. 3 (2023): Septiembre 2023

Sección

Artículos Científicos

Licencia

Derechos de autor 2023 Tropical Grasslands-Forrajes Tropicales

Creative Commons License

Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.