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Fertilization: The use of farmyard manure such as pig cow dung at the neck of vegetables can increase soil temperature in the roots. Fertilization should take place on sunny days.
Pouring feces: combined with cultivator before freezing, using crushed soil to rake the roots of soil, which is beneficial to maintain the soil temperature. The cultivating soil must be carried out before the soil is frozen. The depth of cultivating is preferably 7-10 cm.
Coverage: In the afternoon before the frost, covered with straw, straw, etc. on the dishes and vegetables.
Set wind barriers: In the north side of the vegetable ridge, make a wind barrier of 1 to 1.5 meters high, and set it every 3 to 4 times.
Irrigation: Irrigation before freezing, with the daily average temperature dropping to 2°C - 5°C; suitable for irrigation after freezing, in order to increase the maximum temperature after the cold current to 2°C - 3°C, and suitable for the thawing of soil and vegetable trees .
Nitrogen control: Appropriately reduce the amount of nitrogen fertilizer at the seedling stage, and do not apply quick-acting nitrogen fertilizer before low temperature. Apply phosphate and potash fertilizer once to increase cold resistance.