Key Management Techniques for Facility-Grown Peach Trees After Harvest
How should facility-grown peach trees be managed after harvest? Please introduce. After harvest, facility-grown peach trees can be managed with reference to the following methods: I. Post-harvest pruning 1. Pruning after removing the shed cover. The fruit of facility-grown peach trees is generally fully harvested by mid-to-late May. After the shed cover is removed, the peach trees continue to grow and undergo flower bud differentiation. It is worth noting...
How should facility-grown peach trees be managed after harvest? Please introduce
After harvest, facility-grown peach trees can be managed with reference to the following methods:
I. Post-harvest pruning
In mid-to-late May, the fruit of facility-grown peach trees is generally fully harvested. After the shed cover is removed, the peach trees continue to grow and undergo flower bud differentiation. It is worth noting that the shoot segments formed inside the greenhouse cannot undergo normal flower bud differentiation; only the new shoot segments formed after the shed cover is removed can undergo flower bud differentiation and flower bud initiation. Therefore, after removing the shed cover, the shoot segments formed inside the shed must be pruned to cultivate new fruiting mother branches. Diseased and pest-infested branches and water sprouts should be cut out immediately, the extended new shoots of the scaffold branches should be moderately cut back, and the remaining new shoots should be heavily short-cut to promote the growth of secondary shoots that form fruiting branches.
2. Summer pruning. Early June and mid-August are the periods of vigorous growth and flower bud differentiation for peach trees. Pruning during this period first requires pinching when new shoots grow to about 30 cm, pinching 2 to 3 times in total; second, thinning out overly dense branches and twisting upright new shoots that have space; third, bending branches, especially for trees planted in the 1st year, with the purpose of creating good ventilation and light penetration conditions and controlling excessive growth to facilitate flower bud formation.
3. Dormant period pruning. In mid-November, dormant period pruning is carried out on the tree. During this period, a combination of heading back and thinning out is used. The extended scaffold branches are generally cut back to leave 30 to 40 cm; flower cluster fruiting branches are only thinned, not cut; for densely growing long fruiting branches, upright ones should be thinned and slanting ones retained; fruiting branch groups should be renewed and rejuvenated so that the branch groups remain moderate and vigorous.
II. Post-harvest soil, fertilizer and water management
1. Foliar fertilizer spraying. Spray once every 5 to 7 days. It can be sprayed alone or combined with pesticide spraying. The formula is 0.3% urea + 0.3% monopotassium phosphate + 0.2% photosynthetic micro-fertilizer. Its purpose is to increase the assimilation function of leaves, increase nutrient storage in the tree, promote flower bud differentiation, and improve flower bud quality.
2. Irrigation and drainage. Peach trees are a tree species tolerant of drought and afraid of waterlogging. After the shed cover is removed, drainage should be carried out promptly after natural rainfall to prevent waterlogging damage. However, when the soil is too dry, light irrigation should be applied to ensure a certain level of soil moisture.
3. Cultivation and weeding. After each irrigation, loosen the soil promptly to preserve moisture and clear weeds from the tree. Wait, the source says, which means the area around the base of the tree. Translate as tree? No, must avoid Chinese characters. Use "the area around the base of the tree". Let's fix: clear weeds around the base of the tree to increase soil permeability, activate root physiological functions, and promote root growth.
III. Post-harvest disease and pest control
1. Diseases. The main diseases of greenhouse peach trees include bacterial shot hole disease, brown spot shot hole disease, downy mildew, etc., but they are much milder than in open-field cultivation. For control, conventional fungicides such as zineb, thiophanate-methyl, and carbendazim can be used alternately, generally at a concentration of 600 to 800 times.
2. Insect pests. The more common and serious ones are peach aphid, mealy aphid, and leaf-curling aphid. They can be controlled with pyrethroid drugs such as Kuailing, Wanling, Kuaishaling, and Decis. Organophosphorus pesticides are strictly prohibited.
3. Mites. They occur less in greenhouses and occur in large numbers after the film is removed. They can be controlled with drugs such as saomanjing and nissol, generally at a concentration of 1000 to 2000 times.
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