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.
The trunk is painted white. Whitening agent common formula: 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 oils, and 1 part of tree guard general.
Buried 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, bundle the main and side branches on the central trunk and put 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.
Spray cold protection agent. Spraying a new high-fat film and a tree guard general can form a protective film on the surface of the tree body, reduce transpiration, and improve cold resistance. Spray Kao No. 3 once in mid-February and mid-March, forcing the top nutrient to flow back to prevent drawing, which has a significant effect.
Scientific winter shears. Cutting off some of the autumn shoots in winter 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. The wounds caused by trimming should be applied with a callus anticorrosive film in time to protect the growth of wound healing tissues and prevent infection of bacteria from the wound.
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