How to take measures to prevent cold and frost when growing vegetables in winter

Winter is a hurdle that is difficult for most plants to overcome, and the climate and temperature in some areas in the north may be very low, so it is a headache to grow vegetables for the winter, as well as in the south. As soon as the cold current comes, vegetables are very vulnerable to freezing damage, resulting in adverse growth, so how can we do a good job in the anti-freezing measures of vegetables in winter? Next, Shuai Shuai will tell you some corresponding methods.

1. Strengthen the coverage, keep warm and prevent frost

Before the cold spell in winter, we have to cover the vegetables with plastic film or straw to keep warm and prevent the cold. if we are growing vegetables in the greenhouse, we should consolidate the support of the vegetables in the greenhouse and press the film on the greenhouse. to be on the safe side and the temperature in some places is not a little lower, so a greenhouse film is far from enough, so it is necessary to consolidate a greenhouse film in Dapeng. Then buckle a bracket into this layer of film, put on a layer of film, so that the design can greatly increase the temperature in the greenhouse, and be sure to check the periphery when building it, so as to prevent the gap from getting cold, so as to lower the internal temperature. Generally, the lid is opened in the evening in the morning, and it is breathed for a while at noon to release the ammonia inside, and the poisonous gas can be discharged.

2. Fertilize and cultivate the soil to improve the soil temperature

Choose a good day and pour the matured warm fertilizer such as pig manure or cow manure on the attapulgite part of the vegetable root, which can increase the soil temperature, protect the vegetable root system, and is very helpful to its growth. it plays a good role in resisting the cold winter.

3. Clear ditches to prevent waterlogging.

In general, the ditches in the fields need to be repaired and opened, and sometimes the ditches will be blocked, which will affect the drainage function of the fields, because a large amount of water will be formed after the snow melts in the fields after snowing in winter, so it can only be discharged through the ditches. If the ditches are blocked, the stagnant water cannot be discharged, and all the snow around and on the shed should be cleared after snow. This can prevent the snow from absorbing heat from the soil to melt and lower the temperature of the soil, causing the temperature in the greenhouse to drop sharply.

4. Control nitrogen and spread ash to improve cold resistance.

Do not apply nitrogen fertilizer to vegetables at the seedling stage, because nitrogen fertilizer will make the cold resistance of seedlings worse, and you can buy some potassium dihydrogen phosphate, spray it on the leaves of vegetables before the cold spell comes, and sprinkle some plant ash on the surface of vegetables. this can not only play a role in keeping warm, but also can be converted into nutrients to vegetables, but also can control the root rot of vegetables, why not take three at one stroke?

5. heating by irrigation to increase the temperature of the greenhouse.

Before the cold spell comes, we have to water the vegetables and water them all at once. When the cold comes, we can play the role of heating up, and we don't have to water them repeatedly to reduce the trouble and put them in place at one time.

6. cut off the withered leaves and control the diseases

It is inevitable that some vegetables will suffer frost damage during the winter, so we should cut off the frozen spots in order to avoid their deterioration and spread to other healthy parts, and once the vegetables are frozen, their resistance will certainly decline. so we have to put smoke fumigant in the shed to ignite it, so it can prevent the disease.

The above is how to take anti-cold and anti-freezing measures to grow vegetables in winter. What may be written here is not complete, and it is also very important for the lighting management in the greenhouse. We can use transparent film, which can increase light transmittance. If there are deficiencies, please point out, hope to help you.