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１９９２～１９９４年在京郊两种不同质地土壤上进行了氮、磷、水联合效应的研究。本文是在这些研究的基础上，应用多元回归分析的方法对质地不同土壤氮、磷、水的交互效应进行比较。结果表明，在壤质和砂质土壤上，氮、磷、水对小麦的作用均是水＞氮＞磷。砂土上水的作用更为明显。在肥料对土壤水分效应的影响方面，施用氮肥使砂土的土壤水分特征值Ｗ０、Ｗｍａｘ和Ｗｅ提高，而使壤土的水分特征值降低。磷肥的影响则相反。土壤水分含量对氮磷肥料效应的影响在不同质地土壤上与肥料对水的交互效应有相同的趋势，但作用强度更大一些。
From 1992 to 1994, the combined effect of nitrogen, phosphorus and water on two different soils in the suburbs of Beijing was studied. Based on these researches, the paper uses multiple regression analysis methods to compare the interaction effects of nitrogen, phosphorus and water in different soil textures. The results showed that on loam and sandy soil, the effect of nitrogen, phosphorus and water on wheat was water> nitrogen> phosphorus. Sand on the role of water is more obvious. In the aspect of the influence of fertilizer on soil water effect, the application of nitrogen fertilizer increased the soil water characteristic values W0, Wmax and We, and decreased the water eigenvalue of loam. The impact of phosphate fertilizer is the opposite. The effects of soil water content on the effect of nitrogen and phosphorus fertilizers have the same trend with the interaction effect of fertilizers on water in different soil soils, but the intensity of action is greater.