Critical periods of sorghum and palisadegrass in intercropped cultivation for climatic risk zoning

Revista Brasileira de Zootecnia

Nino Rodrigo Cabral De Barros Lima²  Patricia Menezes Santos¹  Fernando Campos Mendonça¹  Leandro Coelho De Araujo² 

[1] ,USP ESALQ Piracicaba SP ,Brasil

关键词: abiotic stress;    Brachiaria brizantha;    crop-livestock integrated systems;    drought;   

DOI  :  10.1590/S1516-35982011000700008

来源: SciELO

【 摘 要 】

The objective of this work was to define critical periods for sorghum and palisadegrass cultivated on crop-livestock integrated systems under water deficit. An experiment was carried out in a completely random block design with four treatments (control and interruption of water supply in three periods) and three replicates. Water supply was interrupted until soil water humidity was close to permanent wilting point at the phases: germination of palisadegrass seeds; start of tillering of palisadegrass and initiation of panicles of shorghum; start of shorghum flowering. Water deficit starting at palisadegrass germination delayed intital development of the plants because of the reduction in tillering. Water restriction at panicle initiation phase and at sorghum flowering determined reduction of grain production. Critical periods for intercrop of sorghum and palisadegrass correspond to palisadegrass germination phase and flowering and panicle inititation phase of sorghum.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License