Don't relax your management after big cherry harvest

The cherry harvest is basically finished in May and June in Shaanxi Province, and the management is often relaxed after harvest. It should be known that it is also the effective period of cherry flower bud differentiation after harvest. The nutrition supply of the tree body is balanced and timely, which plays an important role in restoring tree vigor and flower bud formation. In the main cherry producing areas of Xi'an Baqiao and Tongchuan, growers have rich experience, but most areas are still relaxed. They are also operated according to general fruit trees, resulting in few or even no results. The author puts forward suggestions on the basis of investigation. For cherry growers: 1. When promoting flower bud differentiation, topdressing should be applied in time: after fruit picking, cherry consumes the most nutrients in its life. After harvest, fertilization supplements nutrition. Tree vigor is strong and easy to form flower buds. In addition to nitrogen, phosphorus, potassium, magnesium, boron, zinc, silicon, iron and other trace elements are extremely important. To master the soil nutrition status of Shaanxi Province, nitrogen fertilizer and phosphorus fertilizer were mainly applied for many years, potassium fertilizer and trace elements were neglected, nitrogen should be controlled, phosphorus should be reduced and potassium should be supplemented, organic fertilizer and biological fertilizer should be selected, and organic and inorganic biological fertilizer should be combined. First, apply enough organic fertilizer according to jin fruit fertilizer calculation per mu 1000 kg, should apply organic fertilizer 1000-1500 kg, add Longfei big ternary organic inorganic fertilizer, which contains beneficial bacteria 0.2 billion, organic matter 20%, nitrogen 20%, phosphorus 5%, potassium 20%, supplement trace elements fertile field A, to achieve full nutrition fertilizer, it is recommended to apply large ternary fertilizer 2-2.5 kg per plant, add fertile field A fertilizer 1.5-2 kg per plant. After sowing or radiating furrows 30 cm wide and 20-40 cm deep, the trees distributed in the whole country are mixed with soil after sowing, covered with topsoil and irrigated. Foliar fertilizer, can choose fruit friend amino acid or Shuofeng 481 foliar fertilizer, mix 600 times evenly spray foliar leaf back and branches, can also add 0.2% borax, spray the whole tree, supplement nutrition to promote flower bud formation. Foliar fertilizer once every 10 days, can be used regularly during the growing season beneficial and harmless. Nitrogen fertilizer should not be applied more in the growing season. Nitrogen fertilizer can cause weak and vigorous growth, and it is difficult to form flower buds. 2. Pruning in summer: cherry flower bud physiological differentiation after harvest, and morphological differentiation in about 2 months after harvest, in addition to balanced fertilization, regulation of tree vigor, balanced pruning is also very important for flowering. Only when reproductive growth and vegetative growth are balanced and nutrients complement each other is important for flower promotion. Only when reproductive growth is completed can flower buds be formed. From the angle of summer pruning, the main technical measures commonly used in cherry pruning can be adopted. (1) Thinning back branches and over-dense fruiting branches, using inner bore ventilation and light transmission, and culturing inner bore branchlets more frequently. For temporary branches that have already borne fruit, thin branches, drooping branches and foreign too dense branches should also be thinned out, and the lost branches that have grown out should be thinned out. Also keep 2-3 branches according to the direction. The rest of the thinning, in short, open the bore ventilation light transmission, conducive to photosynthesis, accumulation of nutrients, the formation of flower buds. (2) retraction, flexible application of picking: the fruit has been transparent, the branches are retracted, and the lower part of the germination is promoted, so that the fruiting part of the next year does not move. Picks the core of the bore retained in the above thinning branches, leaves about 10 cm, continues to sprout branches, continues to pick the core, and makes it form flower buds into a small fruiting branch group. The peripheral branches can stay long, to 25 cm-30 cm topping, there is a large space to expand the scope of growth and fruit. For the control of growth of small cherry trees, it can be sprayed in June and July. PBO, a fruit tree promoter, is used strictly according to the instructions. 3. Timely control of pests and diseases: Shaanxi currently in the cherry disease has gum disease, brown spot perforation disease, anthracnose. Insect pests are leaf miner moth, red-necked longicorn beetle, mulberry shield scale, etc. Integrated pest control method was adopted during occurrence period. Can choose 25% Jinlishi 6000-7500 times + Ainuo Insect Qing 8000 times, or Anminle, Guolong, precious, Nanbao, Anmiante and Avicorpyrifos. Bactericide can also be selected Jianlitong, Pudejin, nano Xin and so on. Follow instructions to control usage. No matter what kind of pesticide is used, soft water is used 4000 times first, and the medicine is mixed into neutral and then proportioned. Dispense at the same time add fruit friend amino acid or Shuofeng 481 foliar fertilizer 6000 times liquid. 6-7 The ecological requirement of cherry is to be afraid of drought and waterlogging. Spring irrigation and summer drainage are the key techniques of water management of cherry.