论文部分内容阅读
在大田试验条件下研究不同灌水处理冬小麦耗水规律与节水灌溉方案确立，结果表明，拔节后为冬小麦耗水量关键期。耗水量与产量呈抛物线关系，在吨粮田冬小麦全生育期耗水量为３７０～４５０ｍｍ。在灌水处理中，水分生产效率随灌水量增大而减少，经济系数和综合经济效益分析以灌三水处理为最高。认为生产上合理节水灌溉方案为：底水、拔节水、灌浆水
Under the field experiment conditions, the study of water consumption regulation of winter wheat under different irrigation treatments and water-saving irrigation scheme were established. The results showed that the key period of winter wheat water consumption after jointing was established. Water consumption and yield showed a parabolic relationship, and the water consumption during the whole growth period of winter wheat in the ton grain field was 370 ~ 450mm. In the irrigation treatment, the water production efficiency decreases with the increase of irrigation amount. The economic coefficient and the comprehensive economic benefit analysis are the highest in the irrigation of Sanshui. The rational water-saving irrigation scheme for production is as follows: bottom water, jointing water and grouting water