采用三因素二次回归通用旋转组合设计,研究了灌水量、氮肥、磷肥的耦合效应对油菜的影响,得到油菜产量对三因素的回归数学模型。结果表明:三因素影响油菜产量的顺序为灌水量>施磷量>施氮量。各因素间存在交互作用,水与氮肥、水与磷肥、氮肥和磷肥在低于2.500和0.833、2.500和0.321、0.833和0.321水平时对产量存在正相关关系,在分别高于以上水平时又会呈负相关关系。经过计算机模拟,得到油菜最高产量达4.82 t hm-2时,相对应的灌水量、氮肥、磷肥用量分别为790.00 m3 hm-2、1155.90 kg hm-2、907.65 kg hm-2。对试验结果进行的验证表明,构建的模型准确可靠。 The three-factor quadratic regression general rotation combination design was used to study the effects of coupling effects of irrigation amount, nitrogen fertilizer and phosphate fertilizer on rapeseed. The regression model of rapeseed yield to three factors was obtained. The results showed that the order of three factors influencing the yield of rape was irrigation amount> phosphorus application amount> nitrogen application amount. There was an interaction between various factors. There was a positive correlation between water and nitrogen, water and phosphate, nitrogen and phosphate below 2.500 and 0.833, 2.500 and 0.321, 0.83 and 0.321, respectively, while above the above levels A negative correlation. After computer simulation, the maximum yield of rapeseed reached 4.82 t hm-2, the corresponding irrigation amount was 790.00 m3 hm-2, 1155.90 kg hm-2 and 907.65 kg hm-2, respectively. Verification of test results shows that the constructed model is accurate and reliable.