---

作 者 ：周涛1;胡华2;惠开基1

期 刊 ：植物营养与肥料学报 2000年 6卷 4期 页码：404-408

关键词：氮；磷；降水年型；

Keywords:nitrogen, phosphorus, different precipitation years,

摘 要 ：采用回归饱和最优设计 ,对宁南山区 3种不同立地农田生态系统影响春小麦产量的氮肥和磷肥用量进行了长期定位研究 ,并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 ,明确了模型因素效应顺序和高产施肥的关系。

Abstract:The paper apply design of regression saturation to make long term experiment on rates of nitrogen and phosphorus affecting spring wheat production in three kinds of different farmland ecological systems. The effect equation of fertilization of spring wheat is put up, and the equation is analyzed. The plan of fertilization of the biggest production and the optimum economic effect are defined, and the sequence of fertilizer and the relation of high?production and fertilization are defined.

---