春化条件及育苗环境是影响大白菜自交系开花的重要条件 ,白菜的花期要靠两方面共同调节 ,覆膜栽培总体看并不能显著提早花期。不同的自交系的花期对外界环境的敏感性不同 ,从而可选育出耐抽薹的、稳定的自交系 The conditions of vernalization and the environment of nursery are the important conditions that affect the flowering of inbred lines of Chinese cabbage. The flowering of cabbage depends on two aspects to be jointly regulated. The overall cultivation of cabbage does not significantly advance flowering. Different inbred lines have different sensitivities to the external environment during the flowering period so as to breed resistant bolting and stable inbred lines