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.该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.“,”The interactions among N,P and water were studied in two soils of different textures in Beijing suburb plain in 1992-1994.The result was compared and analysed with the multiple regression method.It showed that both in loamy soil and sandy soil,water was the most important factor,followed by nitrogen and phosphorus,in the production of wheat.The effect of water was even more obvious in sandy soil.Nitrogen fertilizer promoted the water trait value W?0,W??max? and W?e in sandy soil,but reduced them in loamy so...