黄泥土玉米施肥模型研究

Application Models for High-yield of Maize Planted in Yellow Soil

为探索安顺市西秀区黄泥土玉米施肥模型,采用"3414"方案设计进行了黄泥土玉米肥料效应试验,建立氮磷钾肥料效应回归模型,三元二次肥料效应模型拟合效果好,计算氮磷钾肥最佳施用量:N为12.25 kg/667m2,P2O5为6.84 kg/667m2,K2O为10.98 kg/667m2,最佳产量480.96 kg/667m2;一元二次肥料效应模型计算的推荐施肥量较高,从节约用肥考虑,在施肥决策中应以三元二次肥料效应模型推荐的施肥量N 12.25 kg/667m2、P2O56.84 kg/667m2、K2O 10.98 kg/667m2作为参考。

The '3414'design was used in the test of fertilizer efficiency in maize planted in yellow soil to establish the application models for its high-yield in Xixiu district,Anshun city.The optimum yield was up to 480.96 kg/667m2 under the application amount of N 12.25 kg/667m2,P2O5 6.84 kg/667m2 and K2O 10.98 kg/667m2 calculated by the ternary quadratic regression equation.Because the recommended application amount calculated by the monomial quadratic regression equation was higher,the application amount calculated by the ternary quadratic regression equation should be referenced in maize production in Xixiu district,Anshun city.