水分胁迫效应对冬小麦生长发育影响的试验研究

利用大型水分试验场遮雨棚遮档自然降水，采用人工定量补水进水进行冬小麦土壤占田间持量40％－50％、45％－50％、50％－55％、50％－60％、55％－60％、60％－70％持续时间分别为5、10、15d水分胁迫处理的控制试验。试验结果表明：控制结束复水后，50％－60％、55％－70％水分胁迫处理诱发冬小麦根、茎、叶、总生物量显著增长或明显减缓其衰老速率。土壤含水量占田间持水量50％－60％处理，具有明显的增产、节水效率，确定土壤含水量占田间持水量55％为冬小麦拔期水分胁迫应增产节水的水分临界指标。

The experimental research on water stress effects on growth and development of winter wheat

Using large movable rainshelters to keep off precipitation, the field experiments on the effects of treatments of different soil moisture and duration on the growth, development and yield of winter wheat are conducted by controlled irrigation. The responses of the growth, development and yield of winter wheat to water stress are studied, and processes and methods to improve water use efficiency and to mitigate spring drought are also discussed. These studies provide scientific bases for economical irrigatio...