How to manage the fruit expansion period of Chinese chestnut?

How to manage the fruit expansion period of Chinese chestnut? Please introduce that summer and autumn is the period of rapid expansion of chestnut fruit. It is necessary to strengthen the management of fertilizer and water and the prevention and control of diseases and insect pests in order to make the fruit fully enlarged, the pulp is full, the fruit does not drop in the middle stage, and the fruit quality is good, so as to obtain high yield and high quality. The specific management measures are as follows: 1. Timely fertilization: in summer and autumn, fertilizer must be applied to the roots once a month, mainly nitrogen, phosphorus and potassium. For each tree with fruit more than 50 kg, urea 0.75-1 kg, potassium dihydrogen phosphate 0.5-0.7 kg, or nitrogen, phosphorus and potassium compound fertilizer 1-1.5 kg, sprinkled or drenched 80-100 kg of clear water after rain. 2. Cover the tree plate: in summer and autumn, the tree plate must be covered with dry straw or other weeds, with a thickness of 8-10 cm, in order to reduce water loss, keep the soil moist, prevent high temperature and drought weather from harming underground roots, and improve absorptive capacity. ensure normal absorption of sufficient fertilizer and water. 3. Prevention and control of diseases and pests: during the expansion period of chestnut fruit, it is vulnerable to anthracnose, powdery mildew, dry blight, chestnut fruit moth, chestnut gall wasp, chestnut weevil and so on, resulting in a large number of rotten fruit and fruit drop. It is necessary to spray the mixture of 1000 fold methyloxine or 1000 times dichlorvos and 600x carbendazim inside and outside the crown once a month in order to effectively control the occurrence and harm of the above diseases and pests and protect the fruit. 4. Foliar topdressing: during the expansion period of chestnut fruit, 0.1% magnesium sulfate, 0.2% urea, 0.3% potassium dihydrogen phosphate, 1000-fold triacontanol, 1500 times Shennong chelate fertilizer mixture, or 800-fold fruit tree special organic humic acid active liquid fertilizer solution must be sprayed every 10-15 days, in order to improve the nutritional level of the tree, promote the rapid expansion of the fruit, make the flesh full, and avoid the occurrence of empty buds. Click to get more chestnut planting techniques click to get more fruit planting techniques