During the winter and winter seasons, especially young fruit trees, they are often subjected to low-temperature freezing injury. Light flower buds are frostbite, affecting the following year's yield, and the branches and whole plants are frozen to death. Therefore, how to prevent fruit tree frostbite becomes the most important issue during this period.
The heat capacity of winter irrigated antifreeze is higher than that of soil, and the soil in winter soil can be used to raise temperature and increase temperature to prevent frost damage. Since orchards are mostly built on hillsides, hills, rivers and floodplain lands, these fields are shallow and water conservation is poor, and it is most likely to cause drought damage to fruit trees. Therefore, it is necessary to fill the fruit trees with water for 1 or 2 times, and when the soil layer after irrigation is slightly dry , Lightly scratching the soil surface to cut off the capillary tube, reducing the loss of water and salt accumulation.
After the tree trunk is covered with white fruit trees, the trunk and the main branch of the fruit tree are evenly coated with a whitening agent to prevent freezing, prevent sunburn, and kill pathogens, eggs, and adults hidden in the trunk. The preparation method of the whitening agent is: 10 parts of quicklime, 1 part of sulfur powder, 1 part of salt, 0.1 part of vegetable oil and 20 parts of clear water.
When covering the ground cover, the straw and other coverings should be cut into small pieces of 15 to 20 centimeters in length, uniformly covered and then covered with a layer of soil to prevent the wind from being blown away. After the cover is rotted, it can also become an organic fertilizer for the growth of fruit trees. . For saplings planted from 1 to 3 years old, it is also possible to cover a 1 m square mulch film on the tree tray before frost, which can increase soil temperature and maintain soil moisture.
The root neck of the fruit tree is the most difficult to resist the cold invasion, especially the young trees, which are more vulnerable to frost damage. Therefore, soil must be cultivated at the junction of the ground part and the underground part of the tree before freezing, with a thickness of 20 to 30 centimeters, and it will be removed when it is defrosted in the coming year.
The young shoots of thin-leaf-tree saplings are more susceptible to freezing. During the freezing period, the sticky film covers the saplings, and the lower part is tied tightly with the rope or embedded in the ground soil. It can also play a role in freezing. .
Set up windbreaks Use protective forests to improve the orchard's microclimate, reduce wind speed, suppress drought, and mitigate freezing damage. To build a shelter forest, it is advisable to use a combination of trees and trees. Green trees are ideal. For a small area of ​​orchards, windbreaks can also be set by tying up windbreaks, that is, using a tree branch, hay, etc. on the northwestern side of the orchard, to form a windbreak or windbreak with a height of about 1 meter to protect the neck from freezing. .
The increase in smoke and fume smoke should be performed at the coldest night in winter. The firewood, chopped weeds, sawdust, and oyster shells should be used as fuel. It should be lighted at around 12 o'clock at night. It is advisable to control the fire and use dark smoke as a smoke. Generally, no less than 3 to 4 fire points per acre are set at the upper air outlet.
Some snow is removed in areas where snow is removed. Snow is easily bent or crushes. Branches and branches will increase frostbite. Therefore, after the heavy snowfall, the tree trunk should be shaken in time, shake off the snow, in order to protect the fruit trees for a smooth winter.
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