How do winter vegetables freeze?

Crops and vegetables are also afraid of cold in winter. How can we ensure the normal growth of crops in winter?

Anti-freezing measures of vegetables in greenhouse

1. Strengthen coverage

Buckle the small arch shed in the greenhouse, use the thin bamboo pole as the arch frame, cover the film at night, cover the grass grass on the film; cover the plastic film in the shed, it can increase the temperature and keep the humidity. Using plastic film as apron at the bottom of the shed can obviously reduce the invasion of cold air at the bottom; at the same time, pay attention to plug the gap in the shed and minimize the gap heat dissipation.

two。 Strengthen the management of fertilizer and water

Before and during low temperature freezing injury, crops should stop using nitrogen fertilizer to prevent the decline of plant softness and cold resistance and kill seedlings. 0.3-0.5% potassium dihydrogen phosphate and 400-500 times plant antifreeze solution can be sprayed. Pouring dilute dung water in the greenhouse can make the soil not easy to freeze and achieve the purpose of protecting seedlings and preventing cold.

3. Temporary heating

When the daytime temperature in the greenhouse is lower than 15 ℃ and the night temperature is lower than 5 ℃, cold injury or freezing injury may occur. Temporary heating measures should be taken at night to replenish heat artificially, that is, several briquettes are placed in the shed, which can increase the temperature in the shed.

Anti-freezing measures of vegetables in open field

1. Artificial covering to prevent frost

Before the beginning of winter, sprinkle deciduous leaves, pine hair or crop straw on the vegetable bed as a long-term mulch in winter and remove it when it gets warmer in spring.

two。 Low trench close planting

Appropriate deep planting in winter blowing more northwest wind, can be opened in the border east-west or northeast-southwest, deep 10~13cm shallow ditch, the vegetables will be planted in the ditch, have the effect of wind shelter and warmth. Winter vegetables should be planted deeper, and the roots that are vulnerable to freezing damage should be buried in the soil, so as to avoid wind blowing and reduce freezing damage.

3. Take good care of fertilizer and water

After timely watering anti-freezing water, winter vegetables should be reasonably applied to promote early development. The amount of nitrogen fertilizer should be controlled after the beginning of winter to prevent the apprentice from growing too young. Watering or applying thin human feces and urine should be applied 1 or 2 days before and after the cold wave, when the weather is warmer and the soil is thawed, which can prevent the soil temperature from falling too low and promote the crops to resume growth in time.

4. Make the Xiangyang vegetable bed well.

The vegetable border is made into a slightly inclined surface to the south to increase the amount of solar radiation received by the border and increase the ground temperature.