辣椒氮、磷、钾施肥效应模型初探

为探索遵义县主要水稻土辣椒施肥模型，采用”3414”完全实施方案设计进行了辣椒肥料效应试验，建立了氮磷钾肥料效应回归模型。结果表明，三元二次肥料效应模型拟合效果较好，氮、磷、钾肥最佳施用量N为13．26kg/667m^2．P2O5为5．32kg/667m^2、K2O为11．29kg/667m^2，最佳干椒产量为244．42kg/667m^2。在试验区农户施肥情况调查表明。当施肥与三元二次方程推荐的施肥方案接近时，产量效果比较好，其施肥配置方案为：N为13．26kg/667m^2、P2O5为5．32kg/667m^2．K2O为11．29kg/667m^2，对于指导施肥决策有较大的参考价值。经济效益比较表明，氮、磷、钾配比在中、中、中水平或中、低、低水平时效益较好。肥料效应分析表明．辣椒对氮肥及钾肥的需用量大，其氮、磷、钾施肥比例为1：0．4：0．85。

Effect Models of Nitrogen, Phosphorus and Potassium Fertilizer Application in Capsicum

The ＂3414＂ application design was used in the test of fertilizer effect on capsicum planted in rice fields to set up the optimum fertilizer application models for capsicum production in Zunyi County. The optimum dried fruit yield was up to 3666.30kg per hm^2 under the application amount of 198.90kg N per hm^2, 79.80kg P2O5 per hm^2 and 169.55kg K2O per hm^2 calculated by the ternary quadratic regression equation. The capsicum yield could increase with the application amount closing to the above rate. The results indicated that capsicum growth requires more nitrogen and potassium, and N：P：K is 1： 0.4：0.85 in this study. The optimum fertilizer application model can be popularized in capsicum production in Zunyi County, Guizhou Province, PRC.