宁夏盐池县扬黄灌区玉米氮磷钾肥施用量探讨

运用“311-A”试验设计，探讨宁夏盐池县城西滩扬黄灌区玉米氮、磷、钾肥料的最佳配比。结果表明，施氮对产量的影响较大；在交互作用中，氮磷交互对产量的影响较大，磷钾的交互效应较小；通过回归分析，确定了产量9000kg／hm^2以上的施肥措施为施用纯N肥115．5-128．4kg／hm^2，施用P（P205）肥67．05-84．3kg／hm^2，施用K（K20）肥69．15-82．2kg／hm^2。

Optimum Application of N, P and K Fertilizers in Maize Field of Yellow River Pumping Irrigation District in Yanchi, Ningxia

The"311-A"regression design was adopted to study the optimum ratio of N,P and K fertilizers on maize field of Yellow River Pumping Irrigation District in Cheng Xitan,Yanchi Ningxia.As a result,it is greater to show,use the influence of nitrogen for yield.In interaction,the N and P influence of interactive fertilizer for yield is greater,the effect of P and K is less.Through regression analysis have determined yield in 9 000 kg/hm~2 more than apply fertilizer measure is: use N 115.5~(128.4 kg/hm~2),use P 67.05~84.3 kg/hm~2,use K 69.15~82.2 kg/hm~2.