Phosphorus and potassium application of phosphorus can promote the development of rapeseed roots and enhance rapeseed resistance; potassium can improve rapeseed cold, disease resistance, lodging resistance. Therefore, in the process of chasing fertilizers, the amount of nitrogen fertilizers should be controlled or reduced, so as to avoid the plants being tender and juicy, and the ability to resist coldness will be deteriorated.
Coverage protection can cover crop stalks (such as rice straw and wheat straw) in the rows of rapeseed, weakening the invasion of cold winds on the roots, and applying a layer of chaff or grass ash to the leaves to prevent freezing damage to the leaves; Dig soil cover plant roots.
Re-applied wax fertilizer can be added in the rapeseed rows of miscellaneous fertilizer, ring 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 winter fertilizer spring Use effect.
The use of cultivating soil in combination with cultivator to cultivate roots can not only loosen the soil, increase the temperature of the soil, but also protect the roots of rapeseed, and facilitate the growth and development of the root system. The cultivating of soil should be carried out before the closure of the line, but care must be taken not to injure the soil when cultivating the root. Roots, otherwise it will cause dead roots.
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