中国农科院蔬菜所采取缩短春化时间,延长光照时间,控制温度及对未成熟种子打破休眠等关键性技术措施,使大白菜由一年繁殖一代,增加到4～5代。具体作法是将萌动的大白菜种子置于3℃条件下进行不完全春化处理15天,尔后播于装有园土和蛙石配制的基质 Chinese Academy of Agricultural Sciences vegetables taken to shorten the vernalization time, to extend the light time, temperature control and immature seeds break dormancy and other key technical measures to make Chinese cabbage breeding from one generation a year, increased to 4 to 5 generations. Specific approach is to germinate cabbage seeds placed in 3 ℃ under conditions of incomplete vernalization for 15 days, then sown in the garden with the preparation of the rock and stone matrix