摘要
Abstract
Objective] The aim was to find out the optimal direct seeding quantity and field seedling density, to provide scientific basis for real-izing large area mechanical harvest.[ Method] Setting up 4 sowing rate and seedling density , yield components, actual yield, stress resistance (such as stalk break, lodging resistance), flowering and fruiting period in each treatment were investigated.[Result] The increase of sowing rate could effectively reduce rape plant height, improve nodes order of the first branch, which is conducive to rape branches upward concentrat-ed, shaping of plant type and mechanized harvesting;while the increase of sowing rate restrict rape individual development , reduce branches, ef-fective pods, grains per pod, 1 000-grain weight, which is not conductive to the increase of rape production.[Conclusion] In the area along the Yangtze River in Anhui Province, the rape seeding rate is 3 750 g/hm2 , and the seedling density of the field is about 375 thousand /hm2 , which is more suitable for mechanical harvest of rape .关键词
直播油菜/播量/留苗密度/机械收获Key words
Direct seeding rape/Seedling quantity/Seedling density/Mechanical harvest分类
农业科技
