Top-dressing base fertilizer refers to the combination of organic fertilizer and non-basic fertilizer, combined with nitrogen, phosphorus and potassium, and the combination of macro elements and trace elements. The amount of fertilization should be determined by the size of the tree, the amount of yield, the strength of tree vigor, and the status of soil fertility. The production of 50 kilograms of fruit usually requires 2 kilograms of pure nitrogen, 0.5 kilograms of phosphorus, and 1 kilogram of potassium, equivalent to 100 kilograms of ring fertilizer and 0.25 kilograms of urea.
Pest control is best to encourage physical trapping and extermination. It is to tie a straw or slice a piece of sackcloth on a large branch, trap the pests and pupate them for winter, and then concentrate on killing them. The second is to remove dead fruits from trees, cut off pests and branches, clean up dead branches, fallen leaves, and weeds in the park, and burn or destroy them in order to reduce the sources of pests and diseases. Then there is drug control. After the fruit is picked, the whole garden sprays a bactericide and insecticide. The old bark should be scraped and burned in time, scraped and then sterilized with 5 degree lime sulfur or 1% copper sulphate solution. After the severe disease orchard is defoliated, the entire tree is sprayed with 800-1200 times fluid or 10% Agricultural resistance 120, can eliminate the winterworm.
Deep-turning and soil-deepening can improve the physical status of deep soil such as water, fertilizer, gas and heat, keep the soil fertile and soft, and create favorable conditions for robust root growth. At the same time, the overwintering insects and pathogens in the soil can be exposed to death. Deep plowing can be carried out in combination with fertilization. The depth of plowing is preferably 30 to 60 centimeters. A suitable amount of sandy soil can be added to the viscous soil, and a small amount of clay can be added to the sandy orchard.
One of the safety antifreeze is the whitening of the tree stem, which slows down the sudden change caused by direct sunlight in the fruit tree body, and has antifreezing effect of preventing sunburn. With 10 parts of quick lime, 1 part of sulfur, 10 parts of water plus an appropriate amount of adhesive can be made of whitening agent, coating should be thickened sunny side. Second, in addition to taking measures such as foliar spray of potassium dihydrogen phosphate and white coating on fruit trees in cold areas and shades, it is also possible to use grass packs, plastic sheets, grounds for grass, plastic films, soils, and antifreeze. Fruit trees cut oil and other methods to prevent freezing.
Anti-corrosive disease prevention methods: 1 strengthen cultivation and management, increase organic fertilizer, storage nutrition, to avoid partial nitrogen fertilizer and late irrigation, orchard operations to cut, saw, ring cutter and other tools once, disinfect once to prevent infection . 2 Remove the diseased branches, diseased skin, and dry piles of the tree in time to reduce the source of the disease. 3 It is necessary to completely cure the disease and collect the scraped body and remove it from the orchard. After scraping, it is protected with disinfectants such as lime sulfur residues and bacteriocin.
Timely pruning is too early to cut, and cuts are prone to freeze damage to form dry piles; trimming too late will weaken the tree's vigor and affect yield. Therefore, adult trees and strong trees should be cut early, and young trees and diseases and insects should be cut at night. The soil is fertile, flat, and well-irrigated in early garden conditions; the barren land, mountain and hilly areas, sandy beaches, and orchards with high groundwater levels must be cut in the evening. Hillside gardens must first be cloudy. Negative face cuts should be coated with anti-freeze protection agent.
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