大白菜秋季栽培,由于播期正处于7～8月份,多数品种是不易通过春化的。莲座期时,即使累计低温完成了春化,但由于结球期间气温低、日照短,所以花器的生长极为缓慢,而呈潜伏状态,不易发生未熟抽薹。近年来,大白菜反季节栽培,即春季种植大白菜的地域愈来愈广,面积愈来愈大。由于反季节大白菜栽培的季节正处于春夏之交,发芽期、幼苗期低温易使大白菜完成春化,莲座期、结球期又处于高温、长日照的条件,所以未熟抽薹 Autumn cabbage cultivation, due to sowing date is in July and August, most varieties are not easy to vernalization. During the rosette period, although the vernalization was completed at a cumulative low temperature, the growth of the flower pot was extremely slow and latent due to the low temperature and short sunshine during the bowling, so that it was not prone to bolting. In recent years, Chinese cabbage is cultivated in anti-season, that is, the area where Chinese cabbage is planted in spring is more and more widely and its area is getting larger and larger. Because the season of counter-season cabbage cultivation is at the turn of the spring and summer, the low temperature at seedling stage and young seedling tends to complete the vernalization, the rosette stage and the node balling stage are under the conditions of high temperature and long daylight, so the bolting