The technical management of sweet cherry trees after fruit harvesting is very important, because at this time, the trees have consumed a large amount of nutrients stored in the tree body through the process of leaf spreading, shoot tipping, flowering, fruit setting, fruit growth and development, and fruit harvesting. After entering the photosynthesis nutrient accumulation stage. The management of this period was good. Its technologies include summer cutting, thinning of dense branches, chemical control, fertilization, disease prevention and pest management and other major technologies. 1, reasonable summer cut, timely control 1.1 After the harvest of sweet cherry, the thinning, thin and weak branches, whip sticks, and pests and branches must be removed or shortened in order to open the light path and enrich the branches to reduce unnecessary consumption. Flower buds differentiated and matured. Mainly for strong trees, closed trees, should be carried out from the top down. When the branches of the upper branches are too heavy, they cannot be placed in one place. They should be divided into two times, each time 1-2 large branches, the interval time is 1 month; the thin branches and ineffective branches behind the internal hemorrhoids should be sparse. In addition to; on the back of the dense tip to be wiped out; to prolong the extension of the shoots to retain a prolonged shoot, 1-2 re-plucked heart, and all the remaining tip removed. The intuitive criterion for a reasonable amount of foliage is that when the sun shines directly on the canopy, the light and shadow factor of the ground is between 30% and 40%. 1.2 Twisting, picking and twisting of the spine is the growth of vigorous shoots when the semi-lignified, competition branches twist 180, weakening its growth, promote flower bud differentiation, transform into fruiting branches. After the shoots are still growing more prosperous, they must lightly pick hearts and inhibit growth. The lightening of the tip can lighten the tree's vigor, but the uniaxial extension of the secondary tip occurs after picking. Picking up: Picking up the heart is to remove the young part of the tip before the new shoot is still lignified, called topping. It is one of the most widely used methods for sweet cherry summer trimming. Sowing of young trees can promote more shoots and promote flower bud formation. Topping the tree in the early fruit period and full fruit period can save nutrition, increase fruit setting rate and fruit quality. Topping can be divided into mild topping, moderate topping, and heavy topping. Mild topping: only about 5cm of the top is removed. After topping, only 1 or 2 new shoots can grow and grow. Control the growth in 10 ~ 20cm, continuous mild topping, can form the result of the branch. Moderate topping: The purpose is to promote multi-branching. When the shoot grows to more than 40cm, it should be removed more than 15cm. Generally, it can germinate 3-4 branches. Severe topping: When the shoots develop to more than 40cm, leaving about 15cm to pick up the heart, not only can promote branching, but also make the lower buds grow into short branches or leaves and branch branches, forming a small result sticks. The length of picking branches should be based on the different uses of branches and branches. As a backbone branch, leaving branches longer, should be more than 40cm. When the shoots grow longer and leave branches shorter, and the picking site has been semi-lignified, scissors are used to trim the cut tips. The effect of shearing is stronger than topping. 1.3 Lazhi pulls strong Wang branches to the place where there is space to make up for the lack of backbone sticks. It can accelerate shaping, delay the growth of shoots, improve the illumination of the inner church, and promote flower bud differentiation. In the vertical direction, each main branch should maintain 80-90; overlapping branches can be pulled horizontally to the right direction; the main branch in the same direction should have a vertical distance of 80-100cm. 1.4 timely control of Wangshu in the adoption of the summer shear measures still can not inhibit growth, timely spraying 200-300 times paclobutrazol or 180 ~ 200 times PBO control, according to the interval of half a month, only the principle of spraying shoots, General Wangshu spray 2-3 times to receive better inhibition. 2, timely fertilizer, increase the tree reserve It is usually done from the end of May to the beginning of June, that is, within half a month after fruit picking. Because the sweet cherry begins flower bud differentiation 10 days after picking fruit. Fertilizers are preferably fast-acting fertilizers that contain a variety of nutrients. Such as decomposition of human waste water, cooked bean cake water, compound fertilizer and other organic fertilizers and inorganic fertilizers containing many elements. The dosage depends on the type of heat and fertilizer. Results The amount of fertilizer used by big trees is: decomposing human fecal urine and water, applying about 70 kilograms per tree (or 100 kilograms of pig manure water); if using compound fertilizer, 1.5-2 kilograms should be applied to each tree. Radial groove can also be applied. 2.1 Early application of base fertilizer should be in early September. At this time, the temperature is still high, and the roots can absorb enough nutrients at the second peak of growth, and after cutting the roots, it will promote a lot of hairy roots. Adequate storage and nutrition is the development of the buds in the following year, flowering and fruit setting, and the first fruit speed. Long favorable guarantee. 2.2 The trench ditch is applied to a deep ditch with a depth of 40 cm and a width of 60-100 cm. According to 667 mu of fruit production 2000kg as the goal, the decomposed chicken manure, duck manure, pig manure 2500-3000kg, mixed with high-quality potassium sulfate compound fertilizer 70-80kg, and the soil mix and then applied watering. The iron-deficient and zinc-depleted tablets are mixed and fermented after mixing 25 kg of ferrous sulfate per 667 mu of ferrous sulfate, 15 kg of zinc sulfate, and organic fertilizer. 2.3 Foliage dressing Within one week after harvesting, combined with pest control, spraying 0.3%-0.5% potassium dihydrogen phosphate + 0.5% urea 1-2 times, delaying the defoliation, and promoting the development of flower buds. 3, control pests and diseases 3.1 Aphids and caterpillar pests Aphid species can be sprayed with avermectin drugs at a critical period of time before they can be controlled. Caterpillars can be sprayed with pyrethroid pesticides. Peach leafhopper, also known as swiftlet, is the main disease in the late growth period of cherry. It is the most intense from July to September. Yellow and white spots appear in the damaged peach leaves. When it is severe, the whole leaves are yellow and fall off earlier, resulting in debilitating tree growth and affecting the formation of flowers. , reduce the output in the coming year. It can spray 20% of pyrethrin EC 3000 times solution and 2.5% deltamethrin 2500-3000 solution. In addition, it can also be controlled by chlorsulfuron, imidacloprid, abamectin, diflubenzuron, and the like. 3.2 Bacterial perforation, leaf spot, and other prevention and control period is mainly in the exhibition leaf to the rainy season before the advent of the use of agricultural streptomycin 1000 times plus thiophanate methyl or M-45 600 times Daisy, alternate 10-15 days spray alternately Shi, both disease prevention, but also significantly improve the fruit surface finish. 3.3 Glue Disorders It is advisable to remove glue from the tree body in time after the rain and coat it with lime powder or thiophanate pudding. Always check and follow the control. 4, irrigation After fruit harvesting, flower bud differentiation is mainly performed to restore the tree body and ensure normal flower bud differentiation. Immediately after harvest, fertilization and irrigation should be performed immediately. However, the amount of irrigation water is the degree of wetness in the ground, and short-term drought after irrigation is conducive to flower bud differentiation. During the growing season of sweet cherry, irrigation should not be excessive, and generally the soil moisture should be maintained at about 70% of the field water capacity. 5. Drought prevention and drainage Sweet cherry root distribution layer is shallow, afraid of drought and drought, when the drought should be a small water pouring, so that the soil moisture content remained stable. The sweet cherry trees are most afraid of stagnating water, causing yellow leaves, wilting, dead branches, poor tree growth, reduced yields, dead trees, irregular orchards, and low yields. Increase the occurrence of fluid injection. Therefore, the sweet cherry orchard must be drained, ensure that it is drained within 2 hours after the rain, and try to drain manually to ensure that there is no accumulation of water in the park. Before the rainy season, dig out the drainage ditch. The plots with a history of rushing should be ridged and cultivated, and each ridge can be gradually ridiculed at 5cm. Acupressure Mat,Acupressure Pillow,Combo Acupressure Mat,Other Acupressure Mat Ningbo Prestigeplus Commodity Co.,Ltd , https://www.prestigemedics.com