应用回归分析方法研究了油菜在亩施7.5公斤纯氮水平下,不同时期施氮的最佳比例,建立了油菜产量的数学模型。在计算机上模拟寻优得出亩产165公斤以上方案38套,分析结果:基肥、苗肥、蕾苔肥三者的最佳比例为5:3:2。本文同时讨论了油菜不同时期施氮比例对6个主要经济性状的影响。

Experiments have been canrried out with bestnitrogen fertilizing amlount on main stages in rape with moden regression method,the results are as fallows:Under 7.skg/mu nitrogen fertilizing level,best ratio of base fertilization,winter fertilization and spring fertilization is 5:3:2。At the same time,the relation ships of nine main characters in rape with the nitrogen fertili- zing amount on main stages were discussed in this paper