玉米氮磷钾肥料效应函数模型的建立与分析

Establishment and Analysis of Model of Effect Function of N,P and K Fertilizer in Maize

玉米氮磷钾肥料效应函数模型的建立与分析试验结果表明,此类中等肥力中位砂底灰正土适宜种植玉米,氮肥对产量影响最大,钾肥次之,磷肥最小。玉米产量与氮、磷、钾施用量能高度拟合成三元二次方程,且氮、磷、钾协同作用效应明显。综合分析可得出,目标产量为11 000~13 000 kg/hm^2,推荐纯N的施肥量240~300 kg/hm^2,P_2O_5的施肥量75~90 kg/hm^2,K2O的施肥量75~90 kg/hm^2。

The test results of establishment and analysis of the model of the effect function of N,P and K fertilizer in maize showed that,the middle-level sand bottom ash of medium fertility was suitable for planting corn,the effect of nitrogen fertilizer on yield was the largest and the secand was the potassium fertilizer, the lowest was the phosphorus fertilizer, corn yield and nitrogen, phosphorus, potassium application amount could be highly synthesized undeter mined quadratic equation,and the synergistic effect of nitrogen, phosphorus and potassium was obvious.Through the comprehensive analysis, the target output was 11 000-13 000 kg/hm^2, the recommended fertilizer amount was pure N 240-300 kg/hm^2, P2O5 of 75-90 kg/hm^2, K20 of 75-90 kg/hm^2.