培育壮苗是夺取油菜高产的基础。以往我们这里油菜育苗一般多采用撒播,这种方法虽然播种时比较省事,但有很大的缺点。首先,由于油菜籽小,不易撒得均匀,播种量不易掌握;同时,撒播落籽深浅不一,从而造成出苗不整齐;播种后的田间管理工作极为不便,间苗、定苗的密度不易掌握,播后如遇大雨或浇水后土板无法松土。其次,如除草、治虫、施肥等管理工作都比较费工。据统计,一般撒播育苗比条播育苗多用20—30%的人工,而成苗率却比条播的低15%左右。条播育苗除了能够克服撒播育苗各种缺点外,还可以利用苗床地抽行起苗,按预定的株行距 Nurturing seedlings is to seize the basis for high yield rape. In the past we rapeseed nursery generally use more broadcast, although this method is relatively easy when sown, but there are big drawbacks. First of all, because rapeseed is small, not easy to sprinkle evenly, sowing volume is not easy to grasp; at the same time, broadcast sowing different shades, resulting in uneven emergence; sowing field management is extremely inconvenient, the density of seedlings, Dingmiao difficult to grasp, sowing After heavy rain or watering soil panels can not loose soil. Second, such as weeding, pest control, fertilization and other management work are more labor-intensive. According to statistics, the general broadcast sow seedlings more than 20-30% of artificial, but the seedling rate is 15% lower than the broadcast. In addition to nursery broadcast seedlings can overcome the various shortcomings broadcast seedlings, but also can use the seedbed pumping pumping seedlings, according to the scheduled row spacing