水肥耦合对压砂地膜下滴灌甜瓜的产量效应研究

Coupling Effects of Water and Fertilizer on Drip Irrigation of Melon under Plastic Mulches in Sunada

以甜瓜为供试材料,采用三因素五水平二次回归通用旋转组合设计方法,在宁夏中部干旱带进行了压砂地膜下滴灌水肥耦合效应试验,研究了不同水肥耦合水平对甜瓜产量的影响,并建立了非充分水肥耦合回归模型。结果表明:各因素对产量的影响顺序为灌水量>施磷量>施氮量,灌水量与施磷量的交互作用较显著;经模型寻优,得出不同目标产量下的水、氮、磷最佳组合方案,可为压砂地甜瓜节水节肥和高效栽培提供科学依据。

In this paper,melon is the object of our research in the gravel mulched field.Based on the experiment of the current rotary combination design of square regression of 3 factors with 5 levels,the regression model of effects of irrigation quota and the amount of N and P2O5 with melon yields under the conditions of irrigation under plastic film is established.The main and single-factor effects and interactions of the model are studied.The optimum combination schemes of water with the N and P2O5 chemical fertilizers under different yields have been obtained through the model.