Post-harvest management of Chinese chestnut

The flower bud differentiation period of the second annual yield of chestnut is from September to the first ten days of October, and the management after fruit harvest has a direct impact on the yield of the following year, so it is particularly important to do well in the four steps of "full food, drink, warm clothing and health care". First, apply fertilizer reasonably and give enough to "eat". Generally, every 100 kg of Chinese chestnut needs to consume 4.5-5 kg of pure nitrogen, 4.5-5 kg of potassium and 1.5-2 kg of phosphorus. Fertilizer should be applied in time after fruit harvest, and organic fertilizer is the main fertilizer. General 8-10-year-old trees, each ditch application of barnyard manure 50-60 kg, urea 0.5 kg, phosphate fertilizer 1 kg; more than 10-year-old trees, according to the amount of fruit and increase the amount of fertilizer. Second, irrigate water to fight drought and give enough "drink". After fruit harvest, there is a great loss of water in the tree body, and the drought in autumn and winter is generally serious in farming season, which is easy to make chestnut trees suffer from drought, so chestnut orchards with conditions after fruit harvest should be irrigated once in time, and then timely irrigation is needed in case of drought. Third, cultivate the earth to choke, and give enough "wear". In the middle and last ten days of November, each tree carries 2-4 mature garbage and pond mud according to its size, laying it under the crown with the trunk as the center, and then covering it with a layer of fine soil. Dig again when the temperature rises in the next spring, in order to aerate and grow roots, and at the same time reduce the growth of weeds. Fourth, prevent and cure pests and diseases and carry out "health care". Clear the garden in time after fruit picking, cut off withered branches, disease and insect branches, remove the disease and insect branches and leaves that fall off on the ground, and burn them or bury them deeply. In autumn, the diseases and pests of chestnut trees should be controlled timely, and pesticides can be treated with double Bordeaux solution, 1500-2000 times omethoate emulsion, 2.5% dimethoate EC 8000 times, and so on.