Young apple trees have strong growth potential, poor cold resistance, poor management, and are prone to snagging after winter. Poor growth, tree disorders, delayed results. The death of the entire plant caused serious strains and affected the establishment of the park. Such as strengthening the field management in the fall, promoting the robust growth of trees, the branches mature, can effectively enhance its overwintering, prevent the occurrence of draining phenomenon. Now introduce the main management measures in the fall.
Topping: Before October, the shoots that have not stopped growing will be towed to control the growth of the shoots and promote nutrient accumulation so that the shoots will grow full, robust and mature, which will facilitate safe wintering.
Lazhi: 10 months ago, in order to ease the tree potential and balance the shoots, in the spring and summer branches, on the basis of continuing to pull the branches of various angles of the branches, open the angle. The main branch angle is generally pulled to 70-80 degrees, and the branch is pulled to 90-120 degrees. When pulling, pay attention: Hold the base of the shoot first with one hand, and gently pull the base with the other hand, and slowly pull down to prevent the base from splitting. Do "four not" and "one line": no circles, no bows, no drilling, no overturning, and the branches are still a line.
Take a branch: 10 months ago, while pulling branches and picking up the hearts, take branches on the main branch, the back branch on the auxiliary branch, and the long branch on the center section to change its growth potential and growth direction. Method: Use the hand from the base of the shoot from the inside to the outside and force it slightly to grip the twigs so that the twigs will be damaged. The vascular bundles inside the branches will make a "click" noise, but they will not break the twigs and do not damage the leaves at the same time. The shoots are horizontal or sagging.
In order to promote the growth of the shoots to be full, robust, early mature, and to enhance the body and wintering, after August, every 10-15 days, spray once 0.3-0.5% potassium dihydrogen phosphate and 1000-2000mg/L paclobutrazol, two Can spray at the same time, even spray three times.
Prevention of Daqing leafhopper. At the end of autumn, when the Oviductus spawns on fruit trees, it produces half-moon wounds on the trunk. The winter and late spring water is shed from the wounds, which can easily lead to water loss and draining. From September 20th to October 20th, spray dichlorvos every 10 days, kill the enemy 2000-3000 times, or kill 2000-3000 times or chrysanthemum pesticide. Even spray three times to control Daqingyeye. It is also possible to coat the tree trunk with white anti-grey leaf and lay eggs on the tree.
Shiji fertilizer in time. After the base fertilizer was applied in September, the wounds of the damaged roots could heal quickly and the nutrients could be absorbed and utilized by the root system to increase the nutrient storage of the tree.
Stop the water in time. Until the winter irrigation, no irrigation of autumn water, to promote the mature branches.
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