1. Timely irrigation or foliar spraying. For orchards with more convenient water sources, a small amount of multiple irrigations can be used to keep the soil moist, and the canopy can be sprayed with water multiple times before 9 a.m. or after 4 p.m. to cool the entire canopy while giving the tree The body replenishes water and reduces fruit drop caused by high temperature and water shortage.
2. Delayed weeding by covering tree trays. Mulching is a fundamental measure to reduce the evaporation of water on the ground. You can make full use of wheat straw, weeds, etc. to cover the orchard. In this orchard, weeds are overgrown. Reduce the harm of drought.
3. Reduce the amount of pruning. Summer shearing of fruit trees during high temperature and drought causes new wounds on the branches and increases the transpiration of the tree, which will definitely increase the damage. If pruning is necessary, some disease and insect branches, weak branches, long branches, etc. can be properly cleared and pruned, not thinning, heavy cutting and short cutting. Reduce water transpiration and excessive consumption of nutrients and excessive evaporation and burning of leaf moisture, slow down the impact of drought on fruits.
4. Increase the number of foliar fertilizer spraying. When the fruit tree encounters high temperature and drought, the photosynthesis of the leaves and the absorption of fertilizer by the roots will be significantly reduced, and even the leaves are curled up, so that the leaves are dropped and the fruit is severe. The serious situation may even cause the growth of branches, roots, and fruit expansion to be stopped. And other phenomena. Therefore, in the prevention and control of diseases and insect pests, urea, potassium dihydrogen phosphate, borax, superphosphate leachate can be added to supplement the deficiency of rhizosphere fertilization, thereby enhancing tree vigor and drought resistance. The application concentration is: urea 0.2%～0.3%, potassium dihydrogen phosphate 0.2%～0.3%, superphosphate leaching solution 0.3%～0.5%, potassium chloride 0.3%～0.5%, borax 0.3%～0.5%, plant ash leaching solution 0.3%～0.5%, fresh biogas slurry 5%; earthworm globulin “root nutrient solutionâ€, PBO, etc. are used according to the instructions.
5. The trunk is white. The quicklime and water are melted at 1:10, filtered with gauze, and sprayed directly on the trunk and main branches with a sprayer. It has a reflective effect on sunlight and can reduce direct sunlight on the tree body, thereby reducing humidity and reducing evaporation. Branches and leaves can be sprayed with multiple Bordeaux mixtures (copper sulfate: quick lime=1:2, water is generally 160-240 times). At the same time of drought resistance, it can also prevent early apple leaf decay and fruit rot, or use 0.03% to 0.05% aspirin solution for foliar spray, which can reduce the water loss rate, enhance the drought resistance, and prevent drought.
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