摘要
在大田条件下 ,探讨了不同灌水和施氮处理对冬小麦叶片生长、生理特性及产量性状的影响 .结果表明 ,干旱年型条件下灌水和氮肥增产效应均显著 ,但灌水增产潜力更大 .灌水两次 (拔节和孕穗水 ) ,产量较高 ;灌水 3次 (拔节、孕穗和灌浆水 )增产效果并不明显 ,氮肥全部底施产量下降 .水分胁迫影响肥效发挥 ,降低产量 ,但可通过增加施氮量得到弥补 .只有水氮合理搭配 ,才能有效协调各产量构成因素的关系 。
The field studies indicated that in dry years,both irrigation and nitrogen application had a marked yield increment effect,but irrigation played a more important role.Irrigation at jointing and booting stages could induce a higher grain yield,but irrigation at jointing,booting and grain-filling stages had a less yield increment effect if nitrogen was applied as base fertilizer.Insufficient irrigation reduced the nitrogen efficiency and yield,which could be compensated to some extent by increasing the nitrogen application rate.Only a suitable combination of irrigation and nitrogen application could effectively coordinate the relationship between yield components and increase grain yield.
出处
《应用生态学报》
CAS
CSCD
2004年第3期453-457,共5页
Chinese Journal of Applied Ecology
基金
国家重点基础研究发展规划项目 (G2 0 0 0 0 7790 0 )
国家"十五"重大科技攻关资助项目 ( 2 0 0 1BA5 0 7A0 2 )
关键词
冬小麦
干旱年型
水氮运筹
生理性状
交互效应
产量性状
Winter wheat, Dry year, Irrigation and nitrogen application, Physiological characteristics, Interactive effects, Yield factors.
