Anti-freezing measures of vegetables in winter

Winter crops and vegetables are also afraid of cold, how can we ensure the normal growth of crops in winter?

???? Freezing measures for open field vegetables

1. Make sunny vegetable beds, make vegetable beds slightly inclined to the south, in order to increase the amount of solar radiation received by the bed surface and improve the ground temperature.

2. Low ditch dense planting, appropriate deep planting winter blowing northwest wind, can open east-west or northeast southwest on the ridge, deep 10~13cm shallow ditch, vegetables planted in the ditch, there is wind and warm effect. Winter vegetables should be planted deep, and the roots vulnerable to freezing damage should be buried in the soil to avoid wind blowing and reduce freezing damage.

3. Artificial cover for freezing prevention. Before winter, sprinkle leaves, pine hair or crop straw on vegetable beds as long-term winter cover, and remove them when they warm up in spring.

4. After winter vegetables are planted, fertilizer water should be applied reasonably to promote early development. After winter, nitrogen fertilizer application should be controlled to prevent excessive growth. 1~2 days before the invasion of cold wave and after the cold wave, when the weather warms up and the soil thaws, watering or applying thin human excrement should be timely applied to prevent the ground temperature from falling too low and promote the timely recovery of crops.

???? Anti-freezing measures for greenhouse vegetables

1. Strengthen covering, buckle small arch shed in greenhouse, use thin bamboo pole as arch frame, cover film at night, cover grass mat on film; cover plastic film in shed, can increase temperature and moisture. Plastic film is used as apron at the bottom of the shed, which can obviously reduce the cold air invasion at the bottom; at the same time, attention should be paid to blocking the gaps in the shed to minimize the gap heat dissipation.

2. Temporary heating, when the temperature in the greenhouse is lower than 15℃ during the day and 5℃ at night, cold damage or freezing damage may occur. At night, temporary heating measures should be taken to artificially supplement heat energy, that is, several briquettes should be placed in the shed to increase the temperature in the shed.

3. Strengthen fertilizer and water management. Before and during low temperature freezing injury, crops should stop using nitrogen fertilizer to prevent plants from being too soft and cold resistant and fertilizer killing seedlings. 0.3-0.5% potassium dihydrogen phosphate and 400-500 times plant antifreeze solution can be sprayed. Dilute manure water is poured in the shed to make the soil not easy to freeze and achieve the purpose of protecting seedlings from cold.