栽培措施对直播油菜冬前生物学性状及产量的影响

Study on the effects of agronomic practice on biological characteristics before winter and yield of direct-seeding rape

采用三元二次回归旋转组合设计,研究油菜直播栽培方式下,栽培密度、施氮量、施磷量与冬前植株各形态、生理指标及产量之间的关系,获得了产量高于3000kg/hm2的优化农艺措施方案,以及冬前各形态、生理指标与产量之间的关系。

To establish high-yield direct-seeding cultivating technique of a rape cultivar Zhongshuang 9, a quadratic rotational regression design was used to study the effects of cultivating techniques on biological performance before winter and seed yield. A suitable cultivating technique for high yield (more than 3 000kg/hm^2) rapeseed production was developed. The correlation between plant biological indexes before winter and seed yield was discussed.