大庆地区的白菜生产地块,普遍实行半年休闲养地(晒茬)之后,于7月中旬播种,10月中旬收获。为了充分利用白菜播种之前(4～6月下旬)这段时间的光、热、水资源,在白菜前填闲一茬肥田萝卜等短期速生的绿肥,即于4月上旬播种,6月中旬翻压,7月中旬播种秋白菜。这样不仅可以 Daqing area of ​​cabbage production plots, the general implementation of six months of leisure and raising (drying stubble), sown in mid-July, harvest in mid-October. In order to make full use of the light, heat and water resources during the period prior to cabbage sowing (late April to late June), short-term fast-growing green manure such as Radish and Radish is planted in front of cabbage, ie sowing in early April and turning in mid-June Pressure, sowing autumn cabbage in mid-July. This is not only possible