黔西北山区不同施肥条件下的小麦产量及肥料利用率研究

在黔西北山区进行两年的肥料试验,分析了施肥与小麦产量及肥料利用率的关系。结果表明,与不施肥相比施肥后小麦产量增加,氮磷钾肥配施时小麦产量达到最高,为5 811 kg/hm2。单施氮、单施钾和氮钾肥配施处理与不施肥处理间差异不显著;施肥可以提高小麦对土壤中氮、磷的吸收,且肥料配施效果优于肥料单施;单施氮肥时氮肥利用率仅为30.09%,分别与磷、钾、磷钾肥配施后氮肥利用率显著提高。单施磷肥时磷肥利用率仅为17.40%,分别与氮、氮钾肥配施后磷肥利用率显著提高。

Study on Wheat Yield and Fertilizer Using Efficiency under Different Fertilization Conditions in Northwest Guizhou

This study analyzed the relationship between the wheat yield, fertilizer using efficiency and fertilization through 2 years of fertilizing experiment in northwest Guizhou. The results showed that: 1) Wheat yield increased after fertilization com-pared with no-fertilizer treatment, which reached the highest 5 811 kg/hm2 after NPK treatment. But the difference between no-fertilizer,N,K and NK treatments was not significant; 2)Fertilization could improve the absorption of N and P in soil and the effect of combining application of fertilizers was better than single application of fertilizer; 3)Using efficiency of N was only 30.09% in single applying N,which increased significantly after combining application of N with P,K or PK.Using effi-ciency of P was only 17.40% in single applying P,which increased significantly after P and N,NK combining application.