How to prevent winter frost
1.Strengthening comprehensive management to maintain a strong tree and increase its wintering power
Reasonable application of nitrogen fertilizer in the early stage of growth promotes its normal growth, and in the late stage (mid-August), phosphorus and potassium fertilizers and basal fertilizers are added, no or less N fertilizer is applied, and irrigation is strictly controlled to reduce soil water content and allow the tree to store more nutrients . During the growing season, topping and twisting tips can control the later growth and make the young tree enter the fruiting period earlier. During winter shearing, cutting off some of the autumn shoots can reduce water evaporation, improve the ability of the branches to resist freezing and drought, and prevent large leafhoppers from laying eggs on the branches, so as not to cause drawing.
2.Frozen water
Before freezing the soil, irrigating frozen water once in about mid to late November can increase the cold resistance of the tree and reduce the occurrence of stripping and freezing damage.
3. The trunk is painted white
Common formulations for whitening agent: 30 parts of water, 9 parts of quicklime, 1.5 parts of stone sulfur mixture stock solution, 1.5 parts of table salt, 0.5 parts of animal and vegetable oil.
4. Hay bale method
Bunch the branches into a bunch, then wrap the tree with a straw curtain. (2) Single dry bale method. Cover the trunk with a straw curtain or grass.
For larger young trees.
5.Buried soil method
(1) Buried soil method. The tree body is gently overwhelmed and laid flat on the ground, and a bundle of straw rope is used to directly cover the soil with a thickness of 40 cm. (2) Underground soil burial method. Digging trenches between rows, the size of the trench is the size of the overwhelming tree, the main and side branches are bundled on the central trunk and placed in the trench to cover the soil, the soil thickness is 20cm above the ground. The burial method is only suitable for young trees of 1 to 2 years.
6, spray cold protection agent
Spraying cmc fruit tree antifreeze, high-fat film, and tree coat can form a protective film on the surface of the tree body, reduce transpiration, and improve cold resistance. In mid-February and mid-March, spray 150 times of cmc each time to prevent draws and the effect is significant.
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