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中文摘要：
运用“3414”试验设计，在田间密植条件下（10．5万株／hm^2）研究了不同氮、磷、钾肥配比对新疆滴灌玉米产量的影响，并提出合理的施肥量。结果表明，施用氮（N）、磷（P2O5）、钾肥（K2O）可显著增加玉米产量，增产率、肥料贡献率和农学效率均表现为N〉P2O5〉K2O；肥料投入符合养分报酬递减定率，过量投入表现出负效益，且过量施肥条件下钾肥导致的产量下降高于氮肥和磷肥。氮、磷、钾三因素间存在显著的正交互效应，但较低的施钾水平与氮、磷的耦合增产效应不明显，表明合理的钾肥施用对提高研究区域玉米产量具有重要作用。综合全部模型分析，研究区域密植滴灌春玉米高产的推荐施肥量N、P2O5和K2O分别是296．3、86．6和43．0kg／hm^2。
英文摘要：
Based on the ＂3414＂ field experimental design, a field trial was conducted to study the effects of the combined nitrogen （N）, phosphorus （P2O5） and potassium （K2O） fertilizer applications on the yield of drip-irrigated spring maize under a high planting density （1.05 × 10^5 plants/hm^2） in Xinjiang Uyghur Autonomous Region, and consequently to recommend the optimal application rates of fertilizers. Our result showed that maize grain yields increased significantly with the applications of N, P2O5 and K2O fertilizers. The yield increase rate, fertilizer contribution rate and agronomy efficiency for the three kinds of fertilizers were in the following order： N〉P2O5〉K2O. The fertilizer applications followed the law of diminishing reruns, and thus the negative benefit was observed under excessive fertilization. The yield reduction of maize was severer under excessive K2O application than under excessive N or P2O5 application. The interaction effects of the tree fertilizers on yield were positive and significant, but the interaction of N or P2O5 with low K20 had no significant, positive effect on maize yield. Based on the overall model analysis, the optimal fertilizer application rates for N, P2O5 and K2O were recommended here as 296.3, 86.6 and 43.0 kg/hm^2, respectively, for gaining a high yield of the drip-irrigated spring maize under a high planting density in Xinjiang.
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