Is antifreeze for fruit trees useful? How can fruit trees prevent frostbite? Which method is the most effective?

Whether fruit trees can survive the winter safely is very important, which is directly related to the fruit harvest and the benefit of fruit farmers in the coming year, so is fruit tree antifreeze useful? How can fruit trees prevent frostbite? Which method is the most effective?

Is antifreeze for fruit trees useful?

1. It works. After the fruit trees are coated with antifreeze, a white tight protective film is formed, thus greatly reducing the damage caused by freezing injury, severe cold, late frost, sunburn and so on. Trees can rely on this tight membrane to block the invasion of germs and pests, prevent adults from spawning and pests from overwintering.

two。 What kind of fruit trees should use antifreeze to prevent cold?

Fruit trees are a kind of special-purpose tree species, which can not only play a role in greening and beautifying the environment, but also provide all kinds of delicious fruits for human beings to taste and eat. The growth and development of this kind of trees is essentially different from our common greening tree species, especially in terms of physiological growth and nutrient reserve. Next, I would like to introduce to the master the characteristics of the physiological growth of fruit trees.

The main results are as follows: (1) the nutrition consumption of fruit trees is high, and the nutrient reserve is relatively low.

(2) there are relatively many diseases and insect pests in fruit trees, which is disadvantageous to the safe overwintering of fruit trees if the control is not strengthened.

(3) Fruit trees are easy to grow strong branches and autumn shoots, and the degree of Lignification can not reach safe overwintering.

(4) Fruit trees have the phenomenon of old and small years and weak trees, and their resistance to low temperature is reduced.

(5) the amount of artificial pruning of fruit trees is relatively large, and there are many wounds, which are easy to cause frost injury.

(6) improper management of fruit trees is easy to cause nutrient deficiency and malnutrition, which is disadvantageous to safe overwintering.

3. Plant antifreeze has the following outstanding advantages in fruit trees, so we should give priority to the use of happy forest antifreeze in fruit tree antifreeze, so as to fundamentally change the cold resistance and antifreeze energy of fruit trees to the external environment.

The main results are as follows: (1) it can adjust the growth potential of trees and improve the development of fruit trees.

(2) it can promote the Lignification degree of branches and buds of fruit trees.

(3) it can promote dry matter accumulation and nutrition reserve of fruit trees, balance nutrition and enhance resistance of fruit trees.

(4) it contains special callus promoters, which can repair injured or frozen plant cells and gradually restore the healthy growth of frozen fruit trees.

(5) it can increase the thickness and tolerance of plant cell wall, make the plant temperature reach balance, uniform or slow cooling and heating, and effectively reduce the harm of large temperature drop.

(6) it can increase the sugar content of the fruit, increase the coloring degree of the fruit, and reduce the cold injury and the storage and transportation resistance of the fruit.

4. Usage time of antifreeze:

After picking the fruit in autumn or the Autumn Equinox, begin to spray plant antifreeze until 5 days before defoliation.

Prevent cold in late spring and repair frozen fruit trees in spring. The effect of combination of Chunyu No. 1 and potash fertilizer is better.

What can be done to prevent frostbite of fruit trees

1. Fatten and strengthen trees

Apply base fertilizer to the fruit trees before the cold spell comes. Replenish fruit trees and enhance their cold resistance. Early and deep application can promote the root growth of fruit trees, enhance the photosynthesis of fruit trees, and improve the nutrition reserve of fruit trees. It plays an important role in overwintering fruit trees! The base fertilizer should be mainly organic fertilizer, combined with quick-acting chemical fertilizer containing nitrogen, phosphorus and potassium.

two。 Frozen irrigation

Water releases a lot of latent heat when it freezes, and the orchard is irrigated before the soil is frozen by the role of "night freezing" of the soil. Balance the surface temperature and reduce the damage of winter insects to fruit trees. When irrigation in winter, the amount of water should be soaked through the root system of fruit trees (40-60 cm). After irrigation, the maximum soil moisture in the field is 60%-85%.

3. The branches are painted white

Before the beginning of winter, the branches and roots of fruit trees are painted white with whitening agent. Effective anti-freezing at the same time, can remove branches of pests, germs and so on. The commonly used formula of whitening agent is: 1 part of sulfur powder, 0.1 part of vegetable oil, 10 parts of quicklime, 1 part of salt and 20 parts of clear water. The prepared whitening agent has a good consistency and can be adsorbed on the trunk when brushing the fruit tree. At the same time, when brushing, the whitening agent should be applied to the inside of the branch skin seam. Emphasis should be placed on brushing areas such as diseased branches.

4. Cover the surface

Cover the rows of fruit trees with straw, straw and withered grass to prevent the cold current from invading the root and neck of fruit trees. Reduce the loss of water in soil and increase soil temperature. When covering, the straw and straw should be cut into small pieces of 15-20 cm, and then cover with a layer of soil to prevent it from being blown away by the wind.

5. Bury the earth to protect against cold

Before the soil is frozen, the young trees are buried with fine fluvo-aquic soil with a thickness of 15-20 cm without air leakage. For larger fruit trees, the soil can be buried at the root neck with a thickness of 20-30 cm to prevent the roots from being exposed and frozen.

6. Wrap the tree body

For fruit trees with weak cold resistance, grass rope or grain grass can be used to wrap around branches, trunks and other key parts before the arrival of the cold current. Prevent the fruit trees from being attacked by the cold current and reduce the water loss in the trunk.

7. Cover the crown

For some evergreen fruit trees, non-woven cloth, plastic film and sunshade net can be used to cover the crown to prevent freezing. When it is more than 5 ℃ during the day, lift the mulch and cover it again at night to prevent frost.

8. Wind barrier setting

The establishment of protective forests can improve the microclimate of orchards and reduce the attack of cold current on fruit trees. The shelterbelt adopts the method of combining tree with irrigation. For orchards without shelterbelts, 2 lines of wind barriers can be set up with hay and straw. Protect the root neck of the fruit tree from the cold.

9. Spray lime

Before the cold spell comes, spray lime and antifreeze on the orchard to ease the sharp drop in temperature in the orchard and regulate the cell permeability of the fruit tree. It is appropriate to spray 50-100 kg of lime.

10. Smoking to increase temperature

In the coldest night in winter, weeds, bran shells, firewood and so on are used as fuel. Light the upper tuyere of the orchard to make the smoke permeate the whole orchard and stop smoking at dawn. It is appropriate to have 3-4 ignition points per mu.

Which method is the most effective

Fruit tree antifreeze can often achieve a good control effect, but the cost is high. Trunk whitening has the advantages of low cost and obvious effect, so it is a common anti-frostbite treatment method for fruit trees.