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本文通过统计分析洛阳地区近３０年的降雨量，模拟洛阳地区３种不同的降雨年型，利用防雨旱棚研究旱地农田Ｎ、Ｐ、水的耦合作用及其对小麦产量影响。研究结果表明：在欠水年土壤水分很低的情况下，通过协调土壤中水分和养分，也会产生激励作用，获得较为理想的产量；各因素间的交互作用是可以通过人为调控措施进行转变的。在正常年份和丰水年，Ｎ１和水为顺序加和作用类型；而Ｎ２、Ｎ３和水为协同作用类型。Ｐ的增产效应相对较低；Ｎ的增产效应和土壤水分紧密联系；Ｐ肥的增产效应的大小顺序为：欠水年＞平水年＞丰水年
Based on the statistical analysis of the rainfall in Luoyang over the past 30 years, three different rainfall types in Luoyang were simulated. The coupling effects of N, P and water on dryland farmland and their effects on wheat yield were studied by using rain-fed shelters. The results showed that under the condition of low soil moisture in low water years, by coordinating the water and nutrients in the soil, the incentive effect would be obtained and the ideal yield would be obtained. The interaction between the various factors could be changed through the artificial control measures of. In normal years and wet years, N1 and water are the types of sequential addition and action, while N2, N3 and water are synergistic types. P increased the yield effect is relatively low; N yield-increasing effect and soil moisture are closely linked; P fertilizer yield effect in the order of: less water year> flat water year> abundant water year