Autumn and winter rain in the upper reaches of the Yangtze River is relatively high this year, and rape roots are underdeveloped. Rainy weather often occurs in March and April in this area, which will affect the development of the root system. In particular, rice-rice rapeseed is seriously polluted in the field and is prone to waterlogging. Rapeseed in the middle and lower reaches of the Yangtze River is prone to growing, and it is prone to fall down in the middle and late stages, aggravating the occurrence of diseases and affecting the yield and quality of rapeseed. Therefore, during the overwintering period, clearing and digging should be promptly conducted to keep the “three channels†open, prevent stains from falling, and promote root growth. At the same time, Qinggou clay was cultivated in the root of rapeseed, inhibiting the growth of weeds and increasing the temperature and preventing freezing. Dry rapeseed can be combined with weeding for cultivating soil in the cultivating, raising the soil temperature in the root of rapeseed, controlling the growth of rape above ground, promoting the development of root system, enhancing the cold resistance of plants, and reducing the risk of freezing injury.
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