摘要
为了明确孝义市旱地玉米生产上合理的施肥量,利用"3414"试验方案进行田间试验,建立了肥料用量与玉米产量的肥料效应函数。结果表明,玉米产量与N,P,K肥料效应三元二次回归模型经显著性检验达到显著水平,可以指导玉米施肥;氮(N)、磷(P2O5)、钾(K2O)最佳经济施肥量分别为190,111,93 kg/hm2;地力贡献率为72.2%,土壤肥力中等,施肥效果明显;氮肥增产率为29.3%,磷肥增产率为9.8%,钾肥增产率为14.4%。氮肥是影响孝义市玉米产量的主要因素,对玉米产量影响大小顺序为:N>K>P。
In this study, a ＂3414＂ experiment of maize had been arranged on a representative soil type in Xiaoyi city. The results showed that the optimum economic amounts of N （N）, P（P205） and K（K20） were 190, 111, 93 kg/hm2, respectively. The soil was middle fertility and the contribution of land capability reached 72.2%. Maize yield increment rates by the application of N, P and K fertilizer were 29.3%, 9.8% and 14.4%, respectively. Nitrogen had the most significant effect on yield, and the effect of N, P, K on maize yield was N 〉 K〉P.
出处
《山西农业科学》
2015年第12期1609-1612,共4页
Journal of Shanxi Agricultural Sciences
