1 Adding P and K: P can promote root development of rape, and enhance resistance to rape, rape of potassium can increase cold tolerance, disease resistance, lodging resistance ability. Thus, in the process of topdressing fertilizer should be controlled or reduced the amount of nitrogenous fertilizer applied in order to avoid plant tender and juicy, cold worse, spraying the new fat film, greatly improve the rate of pesticide active ingredients.
2, covering protection: you can crop residues (such as rice straw, wheat straw), and other bedding in the rape between the lines, weakened against the cold of the roots, leaves the surface applicator can be a layer of rice husk or ash, to prevent frost damage of blades ; covering plants can also dig the roots.
3, re-applied wax fat: between the lines in the Rape of Adding Tuza Fei, manure, human waste, ash and other fertilizers, can increase the ground temperature 2 ~ 3 ℃, play the effect of cold and warm, but also can play The effect of fertilizer for spring and winter, spray the new fat membrane, insulation antifreeze.
4, cultivating earth: the earth with cultivators owned roots, loose soil can improve the ground temperature, but also protect the roots of rape, favorable root growth, earthing up should be carried out before the line closure, but care should pay attention to the root in the earth when Can not hurt to root, otherwise it will cause rot Simiao. (Depending on the wind
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