Autumn fruit tree flower bud differentiation management measures
Autumn is a period in which flower buds of various fruit trees such as peach, plum, pear, apricot, apple, jujube and persimmon are differentiated. Therefore, according to different varieties and tree vigor, some measures conducive to flower bud differentiation should be taken to improve fruit trees. The yield and quality.
First, fruit picking and fruit picking in phases. For saplings or old and weak trees, early fruit harvesting should be carried out according to the specific conditions of tree vigor, so as to reduce the nutrient burden on the tree body, so as to facilitate restoration of vigor and promote flower bud differentiation.
Second, the root fertilizer in time. The fruit consumes a lot of nutrients in the tree body and must be supplemented with nutrients in time to restore the tree vigor, ensure that there is sufficient nutrient supply for flower bud differentiation, improve the quality of flower buds, and increase the ability to withstand cold in winter. Generally, the strong tree is sprayed with a mixture of 0.2%-0.3% potassium dihydrogen phosphate solution and 0.3% urea; 0.3%-0.5% urea solution is sprayed on the old and weak trees, sprayed once every 7-10 days, and even sprayed 3 -4 times.
Third, appropriate water control to facilitate flower bud differentiation. For fruit trees that undergo flower bud differentiation from May to October, such as apples, peaches, pears, etc., after the fruit is picked, the liquid fertilizer is continuously applied twice every 7 days, and water control is started until the color of the fruit leaves becomes light and the topsoil is slightly cracked. Degree. If the drought is too severe, it is necessary to spray water on the leaf surface or splash water on the surface, and control the water for 20-30 days.
Fourth, spray medicine. Spraying before the shoot stops can effectively control the growth of new shoots and promote the differentiation of the top buds into flower buds. After the fruits are harvested, paclobutrazol is used to control its growth, which can promote flower bud differentiation. Can also be applied to soil paclobutrazol, usually 15-30 grams per plant, after-effect up to 3 years. Spraying ethephon in autumn can control the growth of young trees and promote the development of short and middle branches, which is conducive to the formation of flower buds.
Fifth, timely pruning. It is necessary to summer trim the trees of the initial results. Buds topping: Eradication of budded shoots in the canopy and competition buds under the clippings. When the new shoot reaches 40 centimeters, it will be picked up. Twigs Twisting branches: The method of pulling branches, hanging branches and supporting branches is adopted for erect growing fruit trees that grow more prosperously, and the angle of upright branches is increased; for leggy branches or prosperous branches, 180 degrees are to be reversed, but do not twist and cause the leggy. Branches turn into branches and ease the tree.
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