基于响应面设计的小白菜氮磷钾肥料效应研究

进行小白菜田间施肥试验，采用响应面分析法，通过3因素3水平响应面优化试验，研究施氮量(N)、施磷量(P₂O₅)和施钾量(K₂O)对小白菜产量的影响，建立小白菜产量的二次回归方程，分析小白菜最佳施肥条件。响应面分析表明，回归模型显著，施磷量对产量有极显著影响，施氮量、施钾量的影响不显著，施磷量与施氮量、施钾量之间的交互作用较强，施氮量与施钾量之间交互效应较弱;各因素对产量的影响顺序为施磷量>施氮量>施钾量。经过统计分析，最佳施肥组合为施氮量100.70 kg/hm²、施磷量98.7 kg/hm²、施钾量123.2 kg/hm²，通过模型推算在此条件下小白菜产量为37.899 t/hm²。研究结果可为高产优质小白菜生产提供技术支持。

The Effect of N,P and K Fertilizers on Pakchoi Yield Based on Response Surface Method

The study conducted a field fertilization experiment on pakchoi and adopted the response surface analysis method. Through a response surface optimization experiment of three factors and three levels, the study analyzed the effects of nitrogen level (N), phosphate level (P₂O₅) and potassium level (K₂O) on pakchoi yield, then established a quadratic regression equation to analyze the optimal cultivation condition for pakchoi. The results showed that the regression model was significant. The phosphorus level had highly significant effects on pakchoi yield, while nitrogen level and potassium level did not have significant effect. There were significant interactions between the nitrogen level and phosphorus level. There were also obvious interactions between phosphorus level and potassium level. However, the interaction between nitrogen level and potassium level was not significant. The order of yield influencing factors was phosphate fertilizer level> nitrogen fertilizer level> potassium fertilizer level. Through statistical analysis, the optimal cultivation condition is: the nitrogen level of 100.70 kg/hm², the phosphate level of 98.7 kg/hm², and the potassium level of 123.2 kg/hm². Under the optimal condition, the yield of pakchoi is 37.899 t/hm². The study can provide technical support for the production of pakchoi of high yield and good quality.