胡麻施氮肥的效果及效益分析  

EFFECTS AND ECONOMIC RETURNS OF NITROGEN FERTILZER TO LINSEED

作　　者：何世炜[1] 葛文华[1] 

机构地区：[1]甘肃草原生态研究所,兰州730020

出　　处：《草业科学》1991年第5期1-3,共3页Pratacultural Science

摘　　要：研究得出,景泰引黄灌区中等肥力条件下,胡麻施氮效应方程为y_kg=106.73+9.25X_N-0.94X_N^2(F=45.93)。按此方程计算而得的最佳经济施氮量为4.418kg/亩,其施氮增产率为21.1％,亩净增收益21.98元,氮素利用率为19.3％、经济产投比为5.4,经济能产投比为0.88,生物能产投比为2.5,实现了经济效益,社会效益,生态效益的结合。The effects of nitrogen on linseed expressed as y=106.73+9.25X_N—0.94_N^2(F=45.93). The optimum rate of nitrogen application is 4.418kg per mu. The yield and net income increased by 21.1％ and 26.98 yuan per mu. The nitrogen efficiency was 19.29％, the ratio of output to input is 5.4, the ratio of energy output to input is 0.88, the ratio of biological energy output and input is 2.5.

关 键 词：最佳经济施氮量 净收益 产投比 

分 类 号：S8[农业科学—畜牧兽医]