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通过在干旱山区不同肥力条件下全膜双垄沟播玉米氮磷钾优化配比试验,探讨氮磷钾不同配比对玉米产量的影响,构建干旱山区土壤不同肥力条件下的施肥模型。试验结果表明:不同氮、磷、钾配比施肥,对玉米籽粒产量均有明显的增产效果,不同肥力地块玉米籽粒产量与氮磷钾施肥量成三元二次函数关系。
Through the experiment of optimizing ratio of NPK fertilizers on maize under different fertility conditions in arid mountainous area, the effects of NPK fertilizers on the yield of maize were discussed, and the fertilization models of soil under different fertility conditions in arid mountainous area were established. The results showed that the fertilization with different ratios of N, P and K significantly increased the yield of maize. The yield of maize in different fertility plots was quadratic function of N, P, K fertilizers.