Six measures to strengthen winter vegetable freeze protection
Coverage method In the afternoon before the onset of frost, straw, rice straw, etc. are used to cover vegetables and vegetables, which can reduce wind and cold mechanical damage. Use 100 kg of straw per acre. To sparsely disperse, must not cover all vegetables to prevent affecting photosynthesis.
Winter irrigation before the frost irrigation, after the cold can make the temperature rise 2 °C ~ 3 °C.
Soil cultivators combined with cultivators before soil cultivation, cultivating roots with crushed soil, can loosen the soil, increase soil temperature, and can directly protect the roots, but the cultivator must be soil before the soil is frozen, the depth of 7 to 10 cm is appropriate.
Open ditch drainage method to open a good "three ditch" to ensure that the ditch, canal, field open, in order to promptly eliminate frozen water.
Smoke method uses weeds, straw, dead branches, fallen leaves, etc. to be stacked around the vegetable fields. Before the frost comes, smoke is smeared at the corners of the wind head to disperse the cold current. But forbidden to burn vegetables.
The nitrogen control method will reduce the amount of nitrogen fertilizer in the seedling stage and it must not be applied to nitrogen fertilizer to avoid the cold resistance of the plants. Top dressing is early to promote vegetable seedlings. Before the advent of low temperature, do not use nitrogen fertilizers. Apply phosphorus and potassium fertilizers once to enhance the cold resistance of vegetables.
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