摘要
以红芒麦（旱地品种）、定西８１３９（２）（水旱地品种）和永良１２号（水地品种）３种不同类型春小麦为材料进行有限供水试验，结果表明，有限供水能有效提高产量和水分利用效率（ＷＵＥ），效应大小为：水地品种＞水旱地品种＞旱地品种。不同生育期，以拔节期效应最明显，灌浆期对旱地品种亦重要。相关分析表明，拔节期补水能有效促进幼穗发育，增加穗长和穗粒数；孕穗期和灌浆期补水对千粒重和经济系数影响最大；有限供水能改善春小麦的生理活动：ψｗ增高，Ｒｓ减小，Ｔｒ和Ｐｎ增加，Ｔｒ与ψｗ、Ｒｓ呈显著负相关。补水与干旱处理间的ψｗ差（水势变矩）与品种抗旱性有关。
Three different varieties of spring wheat, Hongmangmai (dryland variety), Dingxi 8139(2) (irrigation dryland variety) and Yongliang12 (irrigationland variety) were used as the test materials. It was found that the limited water supply can increase the grain yield and water use efficiency (WUE) and the increasing order were: irrigation land variety>irrigation dryland variety>dryland variety at different growth stages of spring wheat. To the stage of limited water, the order to influence yield was: jointing >booting>filling for the irrigation land variety and irrigation dryland variety, and filling, jointing>booting for the dryland variety. It was analysed that limited water supply at jointing may increase the development of young ear, improve the ear length and grain number per ear, and at booting and filling stages can promote the thousand grain weight and harvesting index. The research indicated that limited water supply can improve some physiological processes: ψ w increasing, Rs decreasing, Tr and Pn raising, and Tr is negatively related with ψ w and Rs. Besides, the ψ w difference between irrigation and drought treatment were changed with the drought toleratance of spring wheat correlatively. It can be used as one of drought toleratance indexs.
出处
《西北农业学报》
CAS
CSCD
1996年第4期19-24,共6页
Acta Agriculturae Boreali-occidentalis Sinica
基金
国家攀登计划
国家自然科学基金
关键词
春小麦
品种
有限供水
产量
生理效应
Spring wheat
Variety type
Limited water supply
Yield
Physiological effect
