我所1973年引进门源小油菜,实行油稻复种,两年来又以油菜作水稻前茬绿肥。进行了试验研究和生产示范。实践证明,小油菜不仅是适宜复种、出油率较高的油料作物,也是稻田的好绿肥。它耐低温,可顶凌早播,早生快发;喜湿润,适合水田早春地湿冷凉的特点;抗盐碱,在耕层含全盐0.25%以下的土壤均可种植,生长快,仅50—60天即可翻压。因此,水稻插秧前抢种一季油菜绿肥,是增产改土的一项有效措施。 I introduced in 1973 the source of small rape, the implementation of double cropping of rice, rape two years ago for the former crop of green manure. Conducted a pilot study and production demonstration. Practice has proved that rapeseed is not only suitable for multiple cropping, oil yield higher oil crops, but also a good green manure paddy fields. It is low temperature, can be Ling Ling early sowing, early fast hair; hi wet, suitable for paddy fields in early spring wet and cool features; anti-salinity, in the tillage with all salts 0.25% below the soil can grow, grow fast, only 50 -60 days to turn pressure. Therefore, pre-planting rice seedlings planted rape green manure, is an effective measure to increase production and soil improvement.