在适当晚播时 ,杂交油菜两优 5 86以 1.8～ 2 .1万株 / 6 6 7m2 直播密度的产量最高。产量构成因素中以单位面积有效角果数对产量的影响较大 ,千粒重和每角粒数的影响较小 ;随着密度的增加 ,单位面积有效角果数呈先增后减的趋势 ,千粒重和每角粒数变化较小 At late sowing date, the yield of hybrid rapeseed Liangyou 5 86 with the highest yield was 1.8-2.100 / 6 6m 2. Among the components of yield, the effective pod number per unit area had greater influence on the yield, and the effect of 1000-grain weight and angular grain number was smaller. With the increase of density, the effective pod number per unit area increased first and then decreased, And the number of changes per corner is smaller