以合川区“3414”田间试验为依据,进行数据的收集与整理,通过回归分析建立水稻产量与氮、磷、钾施肥量的三元二次施肥模型.对三元二次肥料效应函数进行降维处理,分别分析了氮肥、磷肥、钾肥与水稻产量的单因素效应和交互效应.并且通过对该试验区水稻施肥模型的研究,获得了水稻氮、磷、钾的最佳施肥量及三者的配比组合情况,实现各种养分平衡供应,满足作物的需要;达到提高肥料利用率和减少用量,提高作物产量的目的. Based on the field experiment of “3414” in Hechuan District, the data was collected and collated, and a three-dimensional secondary fertilization model of rice yield and nitrogen, phosphorus and potassium fertilization was established by regression analysis. The dimensionality reduction and the single factor effect and the interaction effect between nitrogen fertilizer, phosphate fertilizer, potash fertilizer and rice yield were analyzed respectively, and the optimum fertilization rate of nitrogen, phosphorus and potassium in rice was obtained through the research of rice fertilization model in this experimental area The combination of the three situations, to achieve a variety of nutrient balance supply, to meet the needs of crops; to improve fertilizer utilization and reduce the amount of increase crop production purposes.