当制种的大白菜苗在苗床上完成春化阶段后,正值2月下旬到3月上旬,随着土壤的全部解冻,大白菜就可以向大田移植了,而大白菜制种也进入了苗床后管理阶段。1 移栽前的准备1.1 安全隔离区的选择大白菜的杂交制种,种子的纯度是制种的关键。因此,移栽田应选择2 000m内无油菜、苔菜、黑菜等制种菜的地方,形成自然隔离区,防止杂花授粉,特别是农户的 When the planted Chinese cabbage seedlings in the seedbed to complete the vernalization stage, came from late February to early March, with the soil thaw, cabbage can be transplanted to the field, and the Chinese cabbage also entered the Seedbed after the management stage. 1 Preparation before transplanting 1.1 Selection of safe isolation area Chinese cabbage hybrid seed production, seed purity is the key to seed production. Therefore, the transplanted field should be selected within 2 000m without rape, moss, black cabbage and other parts of the system of vegetables, the formation of natural isolation area, to prevent miscellaneous flowers pollination, especially farmers