宁夏平罗县水稻优化种植模型构建试验研究

Rice Optimization Test of Planting Model Construction in Pingluo County of Ningxia

针对宁夏银北引黄灌区灌淤土壤养分状况,以水稻产量为目标函数,选择水稻播种量,单位面积施氮量、施磷量为调控因子,采用回归通用旋转组合试验方法,开展了灌淤土壤水稻优化施肥模型研究。结果表明：水稻播种量,氮、磷这三个因素对产量均有不同程度的影响,单因子作用对水稻产量贡献率大小为：施氮（正效应）〉施磷（负效应）〉播种量（负效应）;水稻产量大于550kg/667m^2以上的优化施肥方案为：水稻播种量20.1-22.7 kg/667m^2、施纯N：17.9-19.3kg/667m^2、施纯P2O5：5.3-6.0kg/667m^2。

This study is about the Yinbei Yinghuang in Ninxia soil nutrients,The study embarked on a test method for soil fertilizer model of rice to yield to the target function,in terms of selecting the rice sowing,nitrogen and phosphorus application for regulatory factors per unit area,combining with the return of General Rotary.As it turns out that rice sowing,nitrogen and phosphorus influence the amount of production of rice.Single-factor on rice yield contribution rate size is： nitrogen（positive effects） phosphorus application（floatingness） seeding rate（floatingness）;rice yield greater than 550kg/667m^2;above optimum application options are： rice sowing 20.1 - 22.7 kg/667 m^2、N： 17.9 - 19.3kg/667 m^2、P2O5： 5.3 - 6.0kg/667 m^2.