摘要
本文采用回归饱和最优设计 ,对宁南三区 3种不同立地农田生态系统影响春小麦产量地氮肥和磷肥的用量进行了长期定位研究。建立了春小麦施肥效益函数模型 ,通过对函数模型分析 ,确定了最大产量效应和最佳经济效应的施肥组合方案 。
Applying optimum design and regression saturation long-site-experiment study analysed the on rate of nitrogen and phosphorus affecting spring-wheat production in three kinds of different farmland ecological system.The benefit equation of fertilization of spring-wheat is put up, By equation analyses, the plan of fertilization of the biggest production and the optimum economic effect are defined, the sequence of fertilizer and the relation of high-production and fertilization are defined, too.
出处
《干旱区资源与环境》
CSSCI
CSCD
2000年第2期71-76,共6页
Journal of Arid Land Resources and Environment
