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大白菜在进行种子春化处理时．不同处理温度和处理时间对植株的花芽分化和抽薹过程影响很大．８℃的经比３，１３℃下植株的花芽分化开始得早，分化速度快，抽薹时间早．抽薹期早晚不同的大白菜品种在花芽分化和抽薹上存在着大的遗传差异性，春化１５ｄ时，３℃和１３℃的处理温度，均不能使晚抽薹材料Ｓ－１和ＹＣ完成花芽分化并引起植株的抽薹；１３℃下春化时间达到３０ｄ时，ＹＣ也不能分化完全的花芽和发生抽薹．在低温处理基础上，长日条件对植株的花芽分化和抽薹过程均有促进效应，但非必要条件．
Chinese cabbage in the process of seed vernalization. Different treatment temperature and treatment time had a great influence on flower bud differentiation and bolting. 8 ℃ than 3,13 ℃ plants began early flower bud differentiation, rapid differentiation, bolting time early. There were great genetic differences in flower bud differentiation and bolting among different Chinese cabbage varieties at early bolting stage. The temperature at 15 ℃ and 3 ℃ and 13 ℃ did not result in flower bud differentiation of late bolting materials S-1 and YC And led to the bolting of plants. When the vernalization time reached 13 ℃, YC also could not differentiate completely flower buds and bolting. On the basis of low temperature treatment, the long-day conditions on the flower bud differentiation and bolting process have a promoting effect, but not necessary.