How to manage rape overwintering before and after heavy snow.

Anti-freezing technology for rape overwintering? Rape crops have certain cold resistance, but due to the influence of bad weather, rape will suffer from different degrees of cold current every winter. According to the different types of rape freezing injury, it is of great significance to take corresponding technical measures to prevent or reduce the occurrence of freezing injury, which will ensure the safe overwintering of rape and improve the yield of rape.

1 ? Choose a variety with strong cold resistance? Through variety test, select high-yield and high-quality cold-resistant varieties suitable for local climate characteristics. For example, Wanshan 18 and Qinyou 7 are obviously better than Deyou 5 and Huiyou 50 in cold resistance.

2 ? The border, waist border and enclosure border in rape field should be well matched, and the three borders should be cleaned frequently, so that water can be stored during drought, which is convenient for drainage during waterlogging, reducing field humidity and avoiding freezing injury caused by waterlogging. At the same time, it also promotes the healthy growth of roots, improves the quality of rapeseed, and is conducive to reducing the impact of cold current on rapeseed. ?