宁南山区各农田生态系统氮、磷、降水配合效应及施肥模式研究

摘要

在宁南山区旱农试区,通过大田试验进行施肥和降水对春小麦产量的影响和春小麦施肥模式研究。结果表明，氮肥对春小麦的影响最大,磷肥次之,降水最小。并提出了不同降水年型的合理施肥范围,分析了最大和最佳产量的施肥组合及其经济效益。%In the dryland experimental areas in mountain areas of South Ningxia, the fertilization model for spring wheat and effect on fertilization and precipitation to its production were studied by field experiment. The result showed that nitrogen affected production very much, phosphorus less, and precipitation the least. The rational fertilization areas in different precipitation years were put forward, and analysis on the fertilization plan for the maximum yield and optimum economic effect was made.