Study on High-yield Culture Technique of Early Mature Rapeseed in Till-less Direct Seeding Way in Double-season Rice Region

The effects of different sowing date,different planting density and different sowing method on high yield of early mature rapeseed were studied in till-less direct seeding way in double-season rice region.The results showed that in Yichun city early mature rapeseed could obtain high yield in till-less direct seeding way.The best sowing date was October 20th or so,the proper planting density was 30×104～37.5×104 plants·hm-2,the best sowing method was no-tillage broadcast sowing.The yield was slightly lower than no-tillage drill sowing and hole sowing.But the cost could be saved 1 500.0～1 800.0 yuan·hm-2,the benefit could be increased 1 252.5～1 470.0 yuan·hm-2.