Due to extensive orchard management, irrational tree structure, and excessively small angles in the branches, resulting in weaker and weaker tree vigor, poor ventilation and light transmission in the interior, thin twigs and weak branches, the resulting parts moved outwards and the yield was low. In order to transform these low-yield apple trees, we have adopted the following technical measures. 1. Pay close attention to the management of soil and fertilizer water under the trees Each year, combine deep plowing and expanding holes, apply 200 kg of organic fertilizer per plant (10 years old or older), cultivate 4-5 times a year, and keep the soil under the canopy loose and free of weeds. In addition, combined with insecticide spraying, spraying foliar fertilizer 4-5 times, found that drought should be timely irrigation.

Second, reasonable pruning pruning should grasp Wangshu to ease the tree potential, weak trees to rejuvenate the principle. 1. Adjusting the angle of the backbone branches so that the canopy is light and light, and the backbone branches have a small angle, which can easily cause the crown to clasp inward. The tree potential is strong and weak, the internal canopies are poor in air and light, the branchlets are easy to die, and the resulting parts are moved outward, and the light is not easy. Formation of flower buds, low yield. The improvement measures are: The winter, summer shear should take the top, support, pull, pressure method to adjust the angle of the backbone branches, so that the main branch base angle opened to about 60 degrees. The weak trees are mainly promoted, appropriately shortened, promote branching, increase the number of branches, expand the resulting parts, Wangshu to ease tree vigor-based, appropriate short and short cuts, cooperate with Xiajian, increase the amount of germination, and make vegetative shoots quickly Convert to result branches to balance the tree potential. To achieve the moderation state. To deal with oversized branches and overlying round branches year by year, adopt a sparse or retractive method to solve them, so that the layer spacing of the main branch of 1-2 layers must be about 1 meter. The dense branches of the main branch of the second layer were removed in time to improve the ventilation and light transmission conditions in the crown. When the tree height reaches about 3.5 meters, it is necessary to gradually fall over and be happy, and adjust the angle of the top branch to 30-40 degrees. 2. Adjusting the results The branches and groups are configured to make full use of space, so that all types of result branches and groups have sufficient light conditions, so that the large and medium-sized branches and branches take up the position, and small-sized branches and branches make up space, and the branches of various results are kept in a robust state. 3. To adjust the fruit trees with vigorous tree growth, the extension branches of the branches at all levels should be cut in the middle and upper parts of the tree to expand the canopy. The growth of weak trees should be small, and should be extended if the branches are not full. Short cuts, using buds grow strong shoots. For the result sticks, the ratio of vegetative shoots to fruiting shoots in the individual group should be adjusted to 3.5:1. Third, comprehensive control of pests and diseases to strengthen the integrated control of rot, early defoliation, spider mites and other major pests and diseases. In addition to strengthening the fertilizer and water, controlling the amount of results, and protecting the leaves, the apple rot disease can be timely disinfected and protected after the medicament is applied and scraped. Early deciduous disease should use carbendazim, zeozir, thiophanate-methyl for spraying prevention 15-20 days after flowering. For spider mites, dicofol and cockroach-killing drugs can be used for prevention and control. The prevention and treatment time should be focused on two times after flowering and wheat harvest, and the effect is very good.

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