Chestnut in May coincides with the flowering period. New shoots grow vigorously. Cultivation and management should be combined with their growth characteristics and physiological needs to try to control vegetative growth, promote reproductive growth, ensure good flowering and fruitfulness, and improve the quality of fruit consumption and increase the value of fruit products. Lay the foundation. The management points are as follows:
One is top dressing supplements. Spraying 0.3% borax +0.3% urea solution during flowering can increase fruit setting rate. After flowering, topdressing chemical fertilizers is mainly nitrogen fertilizer and boron fertilizer. Generally, 2.5 to 5 kg of urea is applied to trees and 0.25 kg of urea are applied to young trees. The application amount of boron fertilizer is calculated according to the projected area of ​​the canopy of 15 g/m2, which is more likely to cause fertilizer damage. After the fertilization, timely irrigation should be performed. No irrigation conditions can be used for hole storage and fertilizer technology. When young fruit, topdressing phosphorus and potassium fertilizers.
The second is to retain males and retain nutrition. When the male flower grows to 3 to 5 centimeters, it sprays 1000 to 1300 times of the solution to remove the excess male flowers and save nutrients for fruit setting. In general, 13 kg of water for each vial is sprayed on the leaves and it should be uniformly and carefully applied.
The third is summer trim. 1. Light the branches and open the light, remove the forever branches, the dense branches and the thin and weak branches in the canopy, and increase the light in the tree body; 2. Take the heart and promote the flowers, and leave the branches at the tip of the fruit and leave 1-3 leaves to pick the heart. From the 10th to the 20th leaves were picked up and the development branches were picked from 13-18 leaves.
The fourth is pest control. Insect pests should focus on the control of chestnut ticks, red spiders, chestnut flowers, wheat moths, boat caterpillars, swing caterpillars, etc., spraying pesticides used imidacloprid 2000 ~ 3000 times, Nisuolang 1600 ~ 2000 times the liquid, 4.8% Bai Ling 1000 ~ 1500 times liquid, lambda-cyhalothrin 3000 times. The disease should focus on the prevention and treatment of ringworm disease and rot disease. The spraying agent should use DuPont Fuxing 8000 to 10000 times liquid, or ring vein No. 1 800 times liquid.
The fifth is cultivating loose soil and pressing green manure. Before the arrival of the rainy season, cultivating and mulching grass can improve the root growth environment, increase soil organic matter content, and improve soil permeability.