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一、甘蓝春化现象春化现象是指由低温引起的甘蓝生长发育上的反应,即甘蓝在生长过程中,必须经过一段时间的低温,才能完成开花结实,这一过程叫甘蓝的春化过程。河北省中南部地区,春甘蓝大都在前一年秋季或初冬季节播种,以幼苗越冬,第二年春夏结球,这一茬甘蓝必须以一定大小的幼苗越冬,才能争取在炎热的夏季到来之前及时成熟。如果越冬的幼苗太大,在冬季长时期的低温下,则通过春化阶段,第二年春定植后,春暖长日照下通过光照阶段,则抽苔开花,而不能形成叶球,这就是先期抽苔。栽培甘蓝先期抽苔现象,各地都有发生,特
First, the cabbage vernalization phenomenon vernalization phenomenon refers to the cabbage caused by low temperature growth and development of the response, that is, the growth process of cabbage, must pass a period of time low temperature, in order to complete the flowering and fruiting, the process is called cabbage vernalization process . Most of spring cabbage in southeastern Hebei Province was planted in the autumn or early winter of the previous year, with the young plants overwintering and the spring and summer the following year. The cabbage must win over the seedling of a certain size in order to win the hot summer season Timely mature before. If the overwintering seedlings are too large, they will pass through the light stage through the vernalization stage, the second spring planting and the warm spring and long sunshine in the long period of low temperature in the winter, then the bolting and flowering will not be able to form the leaf ball, which is pre-pumping moss. Early cabbage cultivation cabbage phenomenon occurs all over, special