Sapling of young trees in apple trees refers to the phenomenon of dead branches after overwintering, which is caused by the imbalance of the temperature and temperature of the ground and the internal water imbalance of the trees. That is, before the apple germinated in spring, due to the large wind and high temperature, the water evaporation of apple saplings was large, but the ground temperature was lower and the root activity was poor. The absorbed water could not meet the needs of shoot water transpiration in the shoot, resulting in physiology Drought (ie, freezing) caused the shoots to die. In severe cases, the shoots could all dry out and die. Newly planted apple saplings, due to their vigorous growth, have a large amount of growth in late autumn, stop growing later, have more water in the tissue, and are fragile. The shoots have poor water retention, high water transpiration intensity, and moisture is easily lost during the winter. These factors led to the poor wintering of young apple trees and their ease of drawing. Some orchards have serious damage to the leafhoppers, and damage to the branches of the leaves is also likely to cause aspiration. The following measures are taken to prevent the apple tree from drawing: (1) Improve the storage and nutrient level of the tree and enhance the ability to overwinter: In the fall shoots, long-term topdressing or spraying of fertilizers dominated by phosphorus and potassium is used to increase the photosynthetic efficiency of the leaves and increase the accumulation of assimilation nutrients. Pay attention to protect the leaves, prevent and treat early defoliation, spider mites, and caterpillars in time to ensure that the autumn leaves are in good condition without falling leaves. Control the late growth of shoots and reduce nutrient consumption. At the end of September and early October, we took care of the unstopped new shoots and controlled watering in the early 8-10 months. (2) Control of Daphne genus: In order to reduce the harm caused by Daphne genus, intercroppings are not used as vegetables, especially cruciferous vegetables. A heavier disc occurred. In October, the adult was spawned and sprayed on the trees, intercropping and weeds with 20% extinction, 2.5% kantrin, 2.5% deltamethrin, etc. 1500 -2000 times fluid 1-2 times. (3) Raising the ground temperature: Increasing spring ground temperature and enhancing the ability of roots to absorb water can prevent drawing. The main measures are: In early December, about 50 centimeters on the north side of the trunk, a crescent-shaped soil ridge with a length of 100 cm and a height of about 50 cm (removed after thawing); or 1-1.5 under the canopy in early February. Square mulch. Trunk earthing in winter significantly reduces the spring temperature in the rhizosphere, which exacerbates the occurrence of bolting and should not be used. (4) reduce the water transpiration of branches Buried seedlings: For the first and second year apple saplings, pile up a mat on the back of the Xiaoshu interface. Lightly bend the saplings onto the soil mat and compact the earth. It is required that the shoots should not be exposed, and the soil thickness should be 15 cm or more. It should be completed before being frozen and dug out in the next year, and should be straightened. Spray protection agent: spray 100-150 times of carboxymethylcellulose on the tree in mid-late and late-March and late-March, which can effectively prevent pumping. (Carboxymethyl cellulose should be used 10 times before spraying. Water immersed for 1 day and night and dilute to the multiple used); Spraying 8 times water retention agent in late February or early March can also prevent the pumping. For the apple trees that have been drawn, they often have sound roots and all or part of the ground has died. If the bud of an apple sprouts on the trunk, the tree should be cultivated by cutting in time. For plants that have dried to the base of the trunk, when the uneaten part sprouts new shoots of apples, two of them are selected to remain, and the upper part of the trunk is left with about 30 centimeters in height, and the remaining parts are sawn off. In the future, one new shoot will be selected and gradually cultivated into a new tree trunk. On the other hand, a new shoot should be controlled by multiple methods of repinning and retraction. When the newly-selected shoots grow to 50 centimeters, they will be tied, and when they grow to more than 1 meter, they will be picked up. According to the growth of the year, they can be successively carried out 2-3 times, so that they can become the more complete canopy of multiple shoots. Remove the tied cricket and another controlled shoot in the winter. If the fresh shoots of the rootstock are not dried out, the management method is the same as above, and the bulls will be picked up by the next year. The plants that had dried up to the upper part of the trunk saw off the dried parts and selected one of the emerging shoots that was at the center and the thick shoots were cultivated as the central leaders, and then picked up the well-proportioned, slanted and robust new shoots 3- Four cultures are main branches. When it grows to 50 centimeters, it will be picked up and then it will be picked up 1-2 times according to the growth. The rest of the new shoots can be treated as ancillary cultures, and sparse places should be sparse, and the growth should be controlled by using methods such as early picking and twisting. The saplings that have been drawn have grown more vigorously and are easier to draw. 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