The management of the big cherry tree after picking is very important. At this time, the tree body consumes a lot of nutrients stored in the tree body through the process of early leaf development, shoot tipping, flowering, fruit setting and fruit growth and development. After harvesting, it is in a critical period of flower bud differentiation and urgently needs additional nutrients. Strengthening the comprehensive management of postharvest cherries can promote the differentiation of flower buds, improve the storage of nutrients in the trees and the output in the coming year, mainly including fertilizer and water management, plastic pruning, and prevention and treatment of pests. Fertilizer management After large cherry fruit picking, timely dressing and early basal fertilizer should be applied. The commonly used method for post-harvest top dressing is manure excretion, spread compound fertilizer and foliar spray fertilizer. Results Generally, 30kg to 50kg per plant or 2~3kg perfumed bean cake or 1kg of n, p, and k multiple compound fertilizer containing no chloride were applied to the big trees. The furrows were applied and the furrow depth was about 20~40cm. After fertilization, the soil was timely covered and watered. The foliar dressing was carried out from July to September. About every 15 days, the leaves were sprayed with various foliar fertilizers or 0.3% urea + 0.3% potassium dihydrogen phosphate or 800 times Taibao 2 or 3 times. Basal fertilizer should be applied early, usually from early August to late September. Mainly organic fertilizer, with inorganic fertilizer and trace elements. Apply high-quality soil miscellaneous fertilizer or organic fertilizer 2500~5000kg per acre, and dig into a radial groove at 1m away from the trunk. Ditch should not be too deep, 20cm can be, so as not to damage the roots too much unfavorable tree growth. Sweet cherries are not drought-resisting and impatient. Therefore, irrigation should be conducted in time with soil fertility combined with fertilization. At the same time, when it encounters rain weather, it must be drained in time. Pruning Cherry summer pruning should be performed immediately after fruit picking. The main technical measures include thinning, picking, twisting, pulling branches, etc., using summer trimming to weaken the competition force, adjusting the level of ventilation and light transmission in the crown, increasing the amount of branches and nutrient reserve, preventing the outward migration of the resulting parts, and promoting flower bud differentiation. ■Thinning It is mainly carried out after fruit picking, to eliminate the large branches and dense branches that affect ventilation, light transmission, and conservation, and improve the conditions for ventilation and light transmission. For some tree trees with canopy closure and poor ventilation conditions, the dense branches are mostly eliminated to solve the wind and light conditions within the canopy. For the upright strong branches that seriously affect the wind and light conditions in the crown, they must be removed from the base. Peripheral branches and perennial branches of the crown should also be removed from the base. When sparse branches, we must be cautious and careful not to be too hasty and not to spend too much time in the year to prevent mishandling and cause the tree to flourish. It is usually handled within 2 to 3 years. Shearing mouth should be timely sealed with healing agent to protect the heart to form short fruit branches and bouquet-like fruit branches. When the new shoot grows to 15cm, leave 5cm to pick up the heart. When it is 10cm longer, leave 5cm again to pick the heart, and then pick it 2~3 times. In order to ease the growth of Wang tip, increase the amount of branches, when the new shoot grows to 30cm, leave 15cm to pick up the heart, and leave 10cm again when the heart is picked again. ■Twist Before July, 5 to 6 leaf buds on the base of the back branch were to be twisted 180 with the thumb or forefinger, and the branches should not be inclined downward to prevent further erection and promote the formation of flower buds. This is the most effective way to ease tree vigor, promote short and medium fruiting branches, and promote flower bud differentiation. The base angle of the cherry branch is small, and the opening angle of the branch must be carried out early. The branches were pulled from mid-August to mid-September to weaken the apical dominance of the shoots and promote short-to-medium fruiting branches and fruit-like fruit branches. It is advisable to pull the angle of the branches to 80~90 and it is forbidden to pull back into a bow-like shape. For coarse branches and large branches, two saws are pulled on both sides, and the “mat†is pulled out. The kerf is wrapped tightly with a plastic film, and the open top is pulled open. ■Paclobutrazol application of paclobutrazol on young cherry can promote flowering and early results. When used, factors such as tree age, tree potential, and canopy size should be considered. Generally young trees up to 3 years old can be used. There are two ways to use it. One is land application. Soil application is generally carried out in mid-to late March. The average application of 15% powder is 2 to 3 g per plant. The second is the leaf spray. General new shoot length 20cm when the spray began, the concentration of 200 to 300 times, the use of 2 or 3 times. When using, we must strictly control the amount and concentration. Pest control The major cherry diseases are brown spot hole and bacterial perforation, dry rot, fluidic gum, root cancer and root rot. For perforation of brown spots and bacterial perforation, spray 70% of Indolin manganese Zn 600 times or 1500 times, interval 15 to 20 days; Rainwater can be sprayed 1 to 2 times 1:1:200 times in multiple years Bordeaux fluid. Prevention of leeches can be combined with control of leaf diseases after fruit harvesting, spray 2 to 3 times of 40% fluorosilicon emulsion 4000 times, 10% difenoconazole microemulsion 2000 times or 25% of pyraclophos 2500 times ester powder. Before the fall leaves, spray copper preparations such as Bordeaux mixture or quinoline copper powder 200 times, spraying a total of 2 to 3 times. For the diseased trees, scrape off the colloids, apply 40% flusilazole cream 200 times, 21% peracetic acid 5 times liquid, or gray copper preparations (100g copper sulfate, 300g calcium oxide, 1000g water ). For dry rot, a knife should be cut longitudinally, and then apply 5 to 10 times the enemy of the bacteria or 30 times agrophonin. For a diseased tree that already has a root cancer or root rot disease, the tumor should be removed or scratched, root cancer should be smeared 50 times or watered 30 times for k84, and root rot must be applied 10 to 20 times for sterilization. Large cherry pest control: red and white spiders can be controlled by 1500 times or 40% sulphur 2000% for 10% of the larvae; Peach leafminers, when larvae are found to harm the leaves or adults, immediately spray high chlorodiflubenzuron 2000, Interval 15 to 20 days, even spray 2 times; Pear nets, spraying 10% of imidacloprid 3000 times or 5% acetamiprid 1500 times, the main spray blade on the back; Red neck beetles, the use of adults at noon and more quiet on the branches On the habits, artificial killing, when the hole found fresh insect feces, artificially digging insects or intrusion into the hole 20 times chlorpyrifos; golden edge giardia, adult stage, early in the morning using its suspended animation to kill, or use at night Black light trapping, eclosion period, injection of 40% chlorpyrifos 10 times into the insect tract to eliminate the adult eclosion. 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