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 topdressing process, the application amount of nitrogen fertilizer should be appropriately controlled or reduced so as to prevent the plants from being tender and juicy, and their ability to resist coldness will be deteriorated. It is recommended that 10-15 kg of Mushi calcium, 5-8 kg of potassium sulfate and 5-7 kg of urea.
Coverage protection can cover crop stalks (such as rice straw and wheat straw) in the rows of rapeseed, generally covering 200-300 kilograms of stalks, weakening the damage of cold wind to the roots, and also spreading a layer of chaff on the leaves. Grass ash can prevent the leaves from freezing damage; it can also cover the roots of plants.
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 ~ 3 °C, play a cold and warm effect, but also can play winter fertilizer spring 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. Http://Content/253402c9-ac92-47a2-9788-c9f15977a369?cType=2
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