不同时期干旱对冬小麦产量效应和耗水特性研究

Effects of Water Stress in Different Growth Stage on Water Consumption and Yield in Winter Wheat

针对不同水分处理对产量和耗水特性的影响 ,在田间对冬小麦不同生育期进行干旱胁迫试验。试验结果表明 :干旱胁迫对冬小麦的产量构成因素、生育时期、水分利用效率、棵间蒸发、蒸散等因素有一定的影响 ;干旱胁迫使冬小麦的生育期缩短 ,整个生育期胁迫能使冬小麦有的生育期缩短 5～ 8d;拔节期的水分对于冬小麦产量和水分利用效率有很重要的影响 ;充分灌水的处理的棵间蒸发和蒸散均高于其它处理 。

A field experiment was carried out to investigate the effects of water stress in different growth stage on water consumption and yield in winter wheat. Experimental results showed that the effects of water stress on yield composition, water consumption, plant growth and development, water use efficiency are significant. The main results can be concluded as followings: ① winter wheat growth season may be shorted about 5～8 days under serious water stress; ② irrigation in jointing stage is very impotent for a good yield and high water use efficiency; ③ water consumption under full irrigation is significantly higher than those under water stress treatments.