1. Increase phosphorus and potassium fertilizers. Phosphorus can increase the development of rapeseed roots and strengthen rapeseed resistance; potassium can improve rapeseed cold, disease resistance, lodging resistance. Therefore, in the process of recovering fertilization, the amount of nitrogen fertilizer should be properly controlled or reduced, so that the plants are tender and juicy, and the ability to resist cold becomes worse.
2. Coverage protection. The crop stalks, etc., are laid between the rows of rapeseeds to weaken the damage of the cold wind to the roots. A layer of chaff or grass ash can be applied to the leaves to prevent the leaves from freezing damage. The roots of the plants can also be excavated.
3. Reapply winter fertilizer. Can be added in the rows of rapeseed fertilizer, circulatory fertilizer, human waste, turfgrass and other fertilizers, can increase the ground temperature 2 °C -3 °C, play a cold and warm effect, but also can play the role of winter fertilizer spring.
4. Cultivate earth. In combination with cultivator, rooting the roots of the soil can not only increase the temperature of the soil, but also protect the roots of the rapeseed, so as to facilitate the growth and development of the root system. The soil should be carried out before the closure of the line, but care must be taken not to injure the root system, otherwise it will cause rot. Dead seedlings.
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