水分胁迫对冬小麦氮素营养效率的影响

Effect of water stress on nitrogen nutrition efficiency of winter wheat.

试验研究盆栽控制水分条件下冬小麦不同生育期水分胁迫对其N素营养的效应结果表明,小麦生育期水分胁迫影响其N素的吸收、运转及产量,其影响程度依次为拔节～抽穗期>抽穗～灌浆初期>灌浆初期～成熟期>返青～拔节期,拔节～抽穗期水分胁迫极显著地降低冬小麦的N素营养效率。

The pot experiment was couducted by way of controling soil moisture to study the effects of water stress on nitrogen nutrition of winter wheat. The results show that water stress affects the nitrogen absorption, nitrogen transport and yield of winter wheat obviously. The degrees of this effect is higher at jointing to heading stage than at heading to early milking, than at early milking to harvesting, than at reviving to jointing stage. The water stress from jointing to heading stage decreases nitrogen nutrition efficiency of winter wheat significantly.