不同栽培密度对油菜品种中双11号生长的影响

Effects of Planting Density on Rape Cultivar Zhongshuang 11

[目的]探讨油菜品种中双11号直播的适宜密度。[方法]研究5种栽培密度(15万,30万,45万,60万,75万株/hm^2)对中双11号产量、农艺性状及产量构成的影响。[结果]不同栽培密度对油菜农艺性状影响较大,随着密度的增加,株高和主花序长度降低,分枝数减少,分枝高度逐渐增高;密度对产量构成因素影响最大的是单位面积角果数,其次是千粒重和每角粒数,产量最高值时单位面积角果数、每角粒数和千粒重并不同时都为最大值。[结论]中双11号直播适宜密度为60万~75万株/hm^2,产量最高可达3 055.50kg/hm^2。

[Objective]To discuss the proper density of rape cultivar Zhongshuang 11. [Method]Effects of five planting densities on the yield,agronomic traits,and yield component of Zhongshuang 11 were researched. [Result] Planting density had relatively great impacts on agronomic traits of rape. With the increase of density,branching number,plant height and main inflorescence length reduced; but branching height gradually enhanced. Density had the greatest impacts on pod number per unit area,followed with 1 000-grain weight and seed number per pod. Pod number per unit area,seed number per pod and 1 000-grain weight were not the maximum at the same time when the yield was the greatest.[Conclusion]The proper sowing density of Zhongshuang 11 is 600 thousand-750 thosuand plants/hm^2; the maximum yield reaches 3 055. 50 kg / hm^2.