Autumn and winter are the best times to prevent and control crop diseases and pests. Many crops need to be pruned, fertilized, etc. at this node. Today, the editor of Huinong.com will summarize chestnut autumn and winter management techniques for chestnut growers. Chestnut buds will turn yellow and crack, so naturally pick them when the fruits fall to avoid greening, which will prevent the chestnuts from falling or being damaged, and will also affect the photosynthesis of the trees in the later stages. Pick chestnuts and clear the yard promptly. Use a pole to knock off buds, insect buds, etc. that have not fallen on the tree, burn them together with the cleaned fallen leaves, dead branches, etc. or bury them deeply. Use a small machine to break the dead branches and fallen leaves, etc., and turn them into organic fertilizer in autumn and winter. .

Chestnut grows in mountainous and hilly areas with poor soil. Peeling a wooden plate and digging a deep hole every year can increase production. Combined with autumn fertilization, dig a trench 30 to 35 cm wide and 40 to 60 cm deep outside the formal trench, add mixed green manure, straw, and rotten organic fertilizer, and water it to exert the fertilizer effect. The best application amount of basic fertilizer is about 10 kilograms of organic fertilizer for every 1 kilogram of production and every night, mixed with an appropriate amount of phosphorus and potassium fertilizer. The amount of organic fertilizer used accounts for more than 30% of the active ingredients of fertilization throughout the year. After harvest, harvest in autumn, mainly in small groups, and cut long branches, dense branches, dense branches, etc. Do not prune too much, use more leaves for photosynthesis, which will help the later accumulation of nutrients in the trees. Winter pruning is carried out from January to February.

For saplings, cultivate branches and select side branches 1 to 2 years after the saplings are officially planted. In the third year, we will focus on supporting education through training results, clearing up weak and long branches in the Neijiang River in a timely manner. The excess number ignores dense branches, cross branches, and overlapping branches, so that the branches are evenly distributed. Fruit trees, with balanced tree vigor, maintain high yield and stable production. Adjust the number of fruiting hairy branches, save 8 to 12 fruiting hairy branches per square meter of crown projection area, and remove weak fruiting hairy branches. Perennial weak fruiting branches shrink into stronger branches. In the ground group, the branches are less than 30 cm long and the males are well-grown. The two buds at the base are short. The double-branch refreshing method stabilizes the fruiting part.

Chestnut has strong cold resistance. Generally, large trees do not undergo antifreeze treatment, and only the trunk area is painted white. Apply whitening agent, mixed with 1 part quicklime, 0.25 part sulfur powder, 0.1 part salt, 6 to 8 parts water, and apply it on stock paper and the forks of eggplants to help treat trees against cold and pests and diseases. Newly planted or newly grafted saplings need to be treated with cold protection. You can tie grass to the trunk to prevent cold, or you can use soil to prevent cold. After wrapping the grafted sprouts with plastic film or newspaper, they can keep out the cold and prevent extraction from happening the next spring.