水氮耦合对北疆滴灌春小麦生产及产量的影响

The Effect of Water and Nitrogen Coupling on Growth and Yield of Spring Wheat Under Drip Irrigation in Beijiang

通过北疆地区春小麦水氮耦合试验研究发现,春小麦水氮互作中,灌水量处于主导地位。在保证灌水时,适当增加氮肥施用量能够促进小麦株高增长,较高的灌水施肥水平可以维持春小麦后期LAI;施中、高氮时配合较高的灌水量可以促进春小麦干物质增加;中水中氮处理可以在不影响春小麦产量的基础上,提高WUE达20%以上,达到节水增效的目的 。

The experimental was carried out to study the effect of water and nitrogen coupling on growth and yield of spring wheat under drip irrigation in beijiang.The results indicated that the irrigation amount was the leading in water and nitrogen coupling,and the nitrogen quantity increasing suitably could promote plant growth of wheat.The higher irrigation and nitrogen level could maintain LAI of spring wheat in later growth stage.The high irrigation water matching up middle or high nitrogen could promote the dry matter accumulation.Based on the yield of spring wheat being unacted,the middle irrigation water matching up middle nitrogen could increase the WUE more than 20% to achieve the goal of water-saving and efficiency increasing.