摘要
在宁夏南部山区旱农试区进行施肥与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,N肥对春小麦的影响最大,P肥其次,而降水的影响最小。N肥和P肥的增产效应转化阈值为16.94kg/hm^2,N肥和降水的增产效应转化阈值为80.81kg/hm^2,P肥和降水的增产效应转化阈值为69.12kg/hm^2。并分析了最大和最佳产量的施肥组合及其经济效益,提出了不同降水条件下的合理施肥范围。
In the dryland-agriculture areas in south mountain region o{ Ningxia, a field experiment was conducted on the fertilization model of spring-wheat and the effect of fertilization and precipitation on its production. The result showed that nitrogen had biggest effects on production, phosphorus was the second, and precipitation was the last. The paper introduces the rational fertilization in different precipitation years, and analyzes the fertilization plan for the highest and optimum production and their economic effects.
出处
《中国生态农业学报》
CAS
CSCD
2002年第2期63-66,共4页
Chinese Journal of Eco-Agriculture
基金
UNDP(联合国开发计划署)援助中国西北旱作地区持续农业体系研究
示范与推广项目(CPR/91/114)部分研究内容
