扬黄灌区膜下滴灌玉米水肥耦合模型及产量效应研究

The Model of Water and Fertilizer Coupling of Maize Drip Irrigation Under Plastic Films and Research on Yield Effect in Pumping Irrigation Areas

以"西蒙6号"为供试材料,采用三因素五水平二次通用旋转组合设计方法,在宁夏干旱地区盐池县花马池镇田记掌村进行了膜下滴灌玉米水肥耦合模型及产量效应研究。结果表明:在该试验条件下,灌溉定额、氮、磷与产量的复相关系数为0.96,水肥处理与产量间的回归关系达到极显著水平,可用此水肥耦合模型进行产量预测。各因素对产量的影响顺序为灌溉定额>施纯磷量>施纯氮量,各因素间的交互作用对产量的影响顺序为水氮>氮磷>水磷,并且高氮配高水,中氮配中磷时产量较高。将灌溉定额、氮、磷其中的两个因素定为零水平,产量随着另外一个因素的增加均呈现先增加后减小的趋势。经模型寻优,得到不同目标产量下水和肥的最佳组合方案,为干旱地区节水节肥、水资源高效利用以及玉米产业的发展提供理论指导。

Based on the＂Simen No 6＂as the test material,the water and fertilizer coupling model and the effect of drip irrigation under the film drip irrigation were studied by using the three factors and five levels of the design of secondary universal rotary combination design method in Tianjizhang Village Hua Machi Town,Yanchi County,Ningxia arid area. The study results show that under the experiment conditions,the correlation coefficient of irrigation quota,nitrogen,phosphorus and yield is 0. 96,and the regression relationship between water and fertilizer treatment and yield is extremely significant. The water and fertilizer coupling model can be used to forecast the yield. The order of influence of each factor on yield is irrigation quota〉 pure phosphorus〉 net nitrogen application. The interaction between the factors on the yield is water and nitrogen〉 nitrogen and phosphorus〉 water and phosphorus,and high nitrogen with high water,medium nitrogen with phosphorus production higher. The two factors of irrigation quota,nitrogen and phosphorus are determined as the zero level,and the yield increases first and then decreases with the increase in the other factors. The optimal combination scheme of water and fertilizer under different target yields is obtained by model optimization,which provides a theoretical guidance for the development of water-saving and fertilizer-saving,efficient utilization of water resources and the development of maize industry in arid areas.