【摘要】 陕西长武渭北旱原轮作试验结果表明,氮肥、磷肥、有机肥、氮磷配合和氮磷有机肥配合使用后,分别比对照小麦平均产量311.2斤/亩增产70.1斤/亩,54斤/亩,168.1斤/亩,187.3斤/亩,328.8斤/亩。豌豆、油菜、毛苕在轮作倒茬中利于地力恢复,可使后茬小麦分别增产13.3%,13.6%,17.4%。当地氮肥利用率为40.3%,磷肥当季利用率仅为11.5%。氮磷配合(无肥底)获利润34.01元/亩,远高于单施 N(利润11.49元/亩)和磷肥(利润7.9元/亩)的施肥利润之和19.39元/亩。有底肥(有机肥)的氮磷配合可获利润为66.76元/亩。更多还原

【Abstract】 The results of rotation experiments on Weibei Rainfed Highland,inChangwu County,Shaanxi Province showed that the application of Nand P ferfilizers as well as organic fertilizer can increase wheat yields.After N,P and organic fertilizers,the matching of N and P fertilizersand the matching of N,P and organic fertilizers applied,there was ayield increase of 70.1 jin,54.1 jin,68.1 jin,187.3 jin,328.8jin per mu onthe average as against the average yields of 311.2 jin per mu in thecontrolled wheat fields.Peas,rapes and winter vetches can recoverland fertility in the rotation,resulting in an yield increase in afterwheat crop of 13.3%,13.6% and 17.4% respectively.The use efficiencyof N fertilizer in the locality is 40.3%,and the current use efficiencyof P fertilizer is only 11.5% The matching of N and P fertilizers(withoutbase fertilizer)can get profits of 34.01 yuan/mu.which is much higherthan that of single application of P fertilizer(profits 11.49 yuan/mu).The profits of P fertilizer application is 19.39 yuan/mu,while the profits of the matching of N and P fertilizer with base fertilizer(organicfertilizer)is 66.76 yuan/mu.This indicates that application of N and Pfertilizer in matching has higher economic result than that of individualN and P application.If the pure organic fertilizer is applied as base fertilizer,the economical returns can be greatly improved in wheat produ-stion in the locality by appling N and P fertilizers in matching.更多还原