不同氮磷配比对滴灌小麦产量及养分利用效率的影响

通过田间小区试验,研究不同氮磷配比对滴灌小麦产量及养分利用效率的影响。结果表明,滴灌和磷配合施用,能显著提高小麦产量;在等量施肥条件下,随水施肥可增加小麦产量;不足的施氮量和施磷量虽然能提高氮、磷肥的农学效率,但是却明显降低了产量,氮、磷肥的偏生产力变化趋势同其农学效率;滴灌随水施肥,氮肥利用率高于滴灌常规施肥3个百分点,钾肥提高4个百分点,滴灌随水施肥,可增加小麦产量,提高肥料利用率。

Effects of Fertilizer N,P on Drip Irrigation Wheat Yield and Fertilizer Use Efficiency

The effects of fertilizer N,P on drip irrigation wheat yield and fertilizer use efficiency were studied by the field experiment.The results showed N,P fertilizer application could significantly increase the yield on drip irrigation wheat.Comparing the yield of the fertilization drip irrigation to conventional fertilizer with the same amount of fertilizer,fertilization drip irrigation could increase the yield.Insufficient amount of N and P,although could improve N agronomic efficiency and P agronomic efficiency,but significantly reduced the yield,and the trends of N and P partial factor productivity was same as the agronomic efficiency.While improving the wheat production with fertilization drip irrigation,also increased the fertilizer use efficiency.The N fertilizer use efficiency of fertilization drip irrigation was higher than the conventional fertilizer by three percentage point,the K was by four percentage point.Therefore,the rational fertilizer and fertilization drip irrigation effectively improved the yield and fertilizer use efficiency.