在冬季频繁的低温寒潮影响下,在旱、浅耕的田块,一些弱苗和早薹油菜极易发生冻害。因此,防止冻害是油菜越冬管理的主要内容,具体措施有以下几点: Under the influence of frequent cold and cold wave in winter, some weak seedlings and early bolting rape are extremely susceptible to frost damage in the fields of dry and shallow tillage. Therefore, to prevent frost damage is the main content of winter rapeseed management, the specific measures are the following: