Vegetable cold protection technical measures

1. Before cultivating the cultivating soil, it can be cultivated in the roots by combining cultivating, which can loosen the soil, protect the root system and enhance the root activity. The depth of cultivating is 7-10 cm.
2. Clearing the ditch, lifting the car to increase the temperature and rainy weather, the humidity in the field is large, coupled with insufficient light, it is very unfavorable for the growth and development of vegetables. At this time, the management focus is to prevent freezing and warming, clearing the ditch and draining the soil, dredging the trenches, the furrows, the gutters and lifting the carcass, enhancing the breathability of the carcass and improving the ground temperature, which is not only conducive to the antifreeze and cold protection in winter, but also beneficial to the coming year. Spring protection against moisture.
3. Apply more organic fertilizer, and apply 0.2%-0.3% potassium dihydrogen phosphate aqueous solution 1-2 times before low temperature application of nitrogen fertilizer to enhance the cold resistance of vegetables. Spraying 400-500 kg of thin human and animal manure per acre can reduce soil freezing and improve the cold resistance of vegetable roots.
4. Before the smoke or wind barrier frost comes, the weeds, straws, litter and other accumulated smoke and smoke in the upper wind head can effectively dispel the cold current and protect the vegetables from freezing damage. It is also used as a wind barrier of 1-1.5 meters high in the north side of the vegetable field to prevent the cold wind from directly invading the vegetables and reducing the freezing damage.

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