The winter pruning of chestnut trees in winter should be scheduled in mid-December to the first month of the following year. For the chestnut trees after fruiting, pruning branches, overlapped branches, and round branches of the insects should be used during pruning. Cross branches, stem branches, thin and weak branches, and drooping branches are all cut off to improve the ventilation and light transmission conditions in the crown. At the same time, it is beneficial to concentrate nutrition and make the shoots thick and full. For the extension branches of the apical shoots and the stems, 50 cm should be reserved for short cuts and triggering the lateral branches to increase the number of resultant mother shoots. At the same time, it is necessary to retain part of the leggy branches in the canopy or in the middle and lower parts of the tree branches to cultivate the resulting mother branches; for the mother trees that have grown too prosperous, appropriate short cuts should be made, and new branches should be promoted in the lower part.
Prevention and control of pests mainly killed the chestnut weevil, and combined with Qingyuan to pick up the killed chestnut fruit and hedgehog shells in the orchard; the litter, residue waste, and trimmed shoots were cleared out of the park and burned together.
When scraping the skin and scraping the skin, the underside of the trunk should be covered with plastic. The rough skin, old skin, and cracked skin are scraped off with a knife, and brought to the park and burned. After the skin is shaved, the trunk and large branches are painted with whitening agent in time to prevent pests or pathogens from infecting the trunk.
Frost-resistant winter chestnut trees are prone to frost damage, which is very unfavorable for winter trees. Tree trays should be loosened and grass should be covered to increase the cold resistance of the tree and make it safe for winter.
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