Winter chestnut garden management points
At present, it has entered the winter season. In order to ensure the quality and high yield of chestnuts in the coming year, we should make full use of the fine weather to manage the chestnut fields.
Li Yuyuan cleared down the empty locusts and insect pests that fell on the branches, cleaned them together with the fallen leaves, and burned them centrally to reduce the pests' wintering sites. Combine fertilization to remove weeds and apply lime once.
After deep-falling and improving the light of falling leaves of earth chestnuts, the deep-turning and soil-changing of the whole garden is combined with Shiji fertilizer, and the depth is 20 to 30 cm. The depth of the crown should be deep, and the circumference of the trunk should be shallow. When the earth is soiled, there is a target to damage a few root systems, which can promote new roots and enhance the ability of the root system to absorb fertilizer and water. Turning the garden can loosen the soil and reduce the wintering sites for pests.
Fertilizers for base fertilizers are mainly dry manure and phosphorus and potash fertilizers. Generally, 50 kg of dry manure, 0.2 kg of potassium chloride, and 1 kg of superphosphate are used for every 100 kg of Chinese chestnut. After fertilization, a layer of fine soil is applied to the trunk. Surrounded by straw to prevent freezing, drought and watering. After the farmyard manure is applied to the soil, it needs to be decomposed by rot before it can be absorbed by the roots. The base fertilizer must be applied early to exert the fertilizer effect, and it is generally applied after the fall leaves. Width 20 cm to 30 cm outside the canopy at a distance of 20 cm to 30 cm, and dig deep and 40 cm in depth or two symmetrical rectangular grooves. Apply fertilizer 2 to 3 days after drying.
Pruning from December to February is the best pruning period. Cut off pests and branches, weak branches, dead branches and cross branches and burn them. The tree shape is naturally happy. After peeling off the old bark, the trunk was painted white with Bordeaux's solution to achieve heat preservation, sterilization and insect killing.
Prevention and treatment of pests and diseases The main diseases and pests of chestnut include anthracnose, chestnuts and weevil. The chlorothalonil and beta-cypermethrin solutions should be thoroughly sprayed after harvest. In addition, the soil in the threshing place can be treated with a 300-fold solution of 40% phoxim EC to eliminate the larvae.
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