What is the best way to prevent fruit trees from freezing?

Below? I found the answer online, hoping to help you!

1, the trunk is painted white. Tree trunk whitening can protect tree trunks and reduce freezing injury. The whitening agent can be prepared from 30 kg of quicklime, 2-3 kg of sulfur powder, 0.5 kg of agricultural salt and flour, a small amount of vegetable oil and 100 kg of water.

2, ridging and topdressing. A tall beard with 40 cm of soil around the trunk looks like steamed bread. The soil should be taken far away, and it is best to cultivate it with organic fertilizers such as pond mud and tidal mud. If soil is taken from the tree tray, the trunk will often be insulated, but the exposed root system or thin root in the tree tray and close to the topsoil will often aggravate the freezing damage. Generally, it is necessary to cultivate the soil before and after heavy snow, and it is advisable to dig before and after starting.

Wrapping the trunk with straw or plastic film has obvious antifreeze effect on citrus trees. Where conditions permit, the triangular straw shed with an opening at the south gate has the best anti-freezing effect on young trees with fruit size of 1-2, and soil should be cultivated at the same time. Results after 4-5 years, sprinkling straw on the crown or tying it with straw rope in the middle of the crown also had antifreeze effect.

3. Fruit tree coverage rate. Covering the crown directly with straw curtain or film can improve the frost resistance and damage resistance of fruit trees. Adopt the method of full coverage for fruit tree seedlings to increase the ground temperature and improve the survival rate of fruit tree seedlings.

4. Fertilize for cold protection. Dry weather often aggravates the freezing injury of citrus. All localities can adjust measures to local conditions, irrigate "winter water" once, reduce freezing damage, restore tree vigor, and enhance the ability to resist injury. Combined with irrigation, organic fertilizer is the main fertilizer in winter, and the proportion of phosphorus and potassium is increased. Fertilization should be supplemented according to the number of fruits. For heavy frozen trees, the fertilization period can be appropriately postponed. In addition, all localities should do a good job in clearing gardens in winter, do a good job in pest control, and protect healthy leaves that have not been frozen for the winter. After beginning of spring, topdressing the fruit trees in time, mainly applying nitrogen fertilizer, using more human excrement and urine, applying it frequently and sparingly, developing new branches and leaves, promoting the growth of fruit trees and restoring their vitality.

5. Heat and smoke. Take local materials and collect weeds, chaff, sawdust, fallen leaves, etc. 4-6 piles per mu, covered with wet grass or thin mud, lit before a calm and clear night to produce smoke, inhibit radiation countercurrent and prevent frost. But this measure must ensure fire safety.

6, biogas slurry antifreeze. The experiment shows that the application of biogas slurry can enhance the tree vigor and prevent citrus from freezing injury. The method is as follows: the biogas slurry is filtered with gauze, and the concentration is the stock solution. If the concentration is too high, it can be diluted with water, sprayed with a sprayer and evenly sprayed on all branches and leaves. It is required to spray the fruit once every 10- 15 days after picking, and spray it three times in a row.

7. clear the snow. Tap the branches of the fruit tree gently to make the snow attached to the fruit tree fall to the ground and reduce the freezing damage of the snow to the leaves and branches.

8. Cut green after freezing. For orange trees that have been damaged by freezing, they should be cut green in time, that is, the autumn shoots and late autumn shoots with severe freezing damage should be cut off, and the cut should be blue two centimeters below the frozen branches. If the leaves of light frozen branches have dried up, the dead leaves should be removed in time to avoid water loss, prevent the frost damage from aggravating and restore trees as soon as possible.

9. Sparse flowers and fruits. For fruit trees with severe freezing damage, all buds should be removed at the early flowering stage in spring to ensure the vigorous growth of the trees; For lightly frozen fruit trees, special attention should be paid to thinning flowers and fruits, paying more attention to thinning more and leaving less, and applying more fruit fertilizer at the same time to improve the production efficiency of orchards.