摘要
在东新大田生产条件下，就冬小麦只进行冬灌时的优化施肥问题进行了研究。结果发现由于东新土壤普遍缺Ｎ而富Ｐ，施用Ｐ肥无明显增产效果，低Ｎ下施Ｐ反而减产；而施Ｎ则具有明显节水增产效果。因此，在东新只灌一水（冬灌６０ｍｍ）情况下，从发挥肥效和提高ＷＵＥ的角度出发，施纯Ｎ１５０ｋｇ／ｈｍ２，Ｎ∶Ｐ＝２∶１即可达到较优效果，过量ＮＰ肥施用无助于产量和ＷＵＥ的提高。
The optimum application of winter wheat were studied under water saving irrigation in Dongxin village.The result showed that the effect of P application was not obvious,yield and WUE of winter wheat were reduced by P application under low N condition.But yield and WUE of winter wheat were increased significantly by N application because of deficient N and plentful P in soil.There for the effect of application of N 150 kg/hm 2 and N∶P=2∶1 was optimum under water saving irrigation in Dongxin village.
出处
《水土保持研究》
CSCD
1999年第1期79-82,共4页
Research of Soil and Water Conservation
关键词
节水灌溉
冬小麦
施肥优化
water saving irrigation winter wheat optimum application
