膜下小管出流压砂地西瓜水肥耦合产量效应研究

Study on Production Effect of Water and Fertilizer Coupling on Gravel Mulched Field Watermelon with Small Pipe Outflow Irrigation under Plastic Film

采用三因素五水平二次回归通用旋转组合设计方法进行了试验研究,得出了宁夏中部干旱带压砂地西瓜小管出流条件下,不同灌水量、施油渣量和施复合肥量与产量的回归模型,并进行了主因素效应、单因素效应和交互作用分析。研究结果表明:在本试验条件下各因素对产量影响的顺序为灌水定额(x1)>施油渣量(x2)>施复合肥量(x3),通过交互作用分析可知,施油渣量与灌水量较高的组合产量较高。经模型寻优,求出了不同目标产量下的水、油渣、复合肥最佳组合方案,可以为宁夏中部干旱地区压砂地西瓜补灌和施肥提供参考。

The quadratic regression general rotary combination design method with three factors and five levels is adopted to carry out experiment research in this paper. And the regression model of gravel-mulched field watermelon production effect with irrigation quota, the amount of oil residue and compound fertilizer under the condition of small pipe outflow irrigation under plastic film in central arid region of Ningxia is established. The main effect, single factor effect and interaction are studied, too. The results show that the order from large to little of influence on yield is irrigation quota, the amount of oil residue, compound fertilize, subsequently. Through interaction analysis, it can be found that the yield is higher when the amounts of oil residue and irrigation quota are higher. The optimal combination schemes of water with oil residue and compound fertilizer under different yields are obtained through model optimization. This will provided consultation for supplied irrigation and fertilization of gravel mulched field watermelon in central arid region of Ningxia.