The winter pruning of fruit trees is an extremely important technical link in the annual management of fruit trees. The pruning is reasonable and can regulate the relationship between vegetative growth and reproductive growth, determine a reasonable amount of load, overcome the size of years, and prolong the life span of fruit trees. The pruning of apricot trees is no exception. Different apricot trees have different pruning methods and strategies. In the production practice, the following pruning methods are adopted: 1. Winter pruning of saplings and early fruit trees Apricot trees in young and early fruiting stages generally thrive, the canopy expands rapidly, the shoots grow in large amounts, and often two or three times branch. Pruning this period should take into account both the plastic and the results. For the main and lateral branch extensions should be lightly cut long, generally 2/3 of the length of the entire branch short. Weed out densely crowded branches, multiple branches, overlapping branches, and strong tree branches, and control the growth of competing branches and standing branches. For the development of the golden mean, the development of relatively open branches should be put slowly, to promote the germination of short branches, increase the number of branches, flowers or the results of timely retraction after cultivation into the result Zhizu. The medium and short branches have a large angle and are easy to flower. They must be retained as much as possible to facilitate the result. The young trees that grow weaker should be appropriately shortened, and the dense and weak branches should be eliminated, and more robust branches should be kept. The standing branches and branches should be straightened as supplementary supporting branches to promote strong and medium-short fruit branches. Second, the pruning period of fruit trees in the fruit period of the fruit tree has been basically completed, with the increase of tree age, the yield is gradually stabilized before the increase, the growth potential weakened, the tree vigor gradually eased. The main task of the pruning period is to adjust the relationship between growth and results, maintain the tree vigor, and extend the years of fruitful results. When pruning, according to the situation of branches and crowns, appropriate density and weakness, in order to maintain a stable result position and growth potential. For the extension branches at all levels, moderate short cuts (1/3- to 2/3 of the original year's cut branches) are generally made, so that they continue to draw strong and healthy shoots. For weakened main branch, lateral branch, perennial auxiliary branch, result branch group, and pendulous branch, retreat or raise the angle in the place with strong branch to restore its growth potential. For the lower part of the canopy and the inner litchi, we must pay attention to the timely rejuvenation, so that it will continue to produce new and robust results. The dense branches and strong twigs on the upper and outer parts of the canopy are retracted or removed to improve the light in the inner canopy. Apricot trees have weak branching ability. As long as they are not too dense, the resulting branches, long fruit branches, and growing branches of growing middle do not generally need to be eliminated. Alternate results. III. Winter trimming of senescence tree During the senescence period, the branches of each apricot tree grow weaker, the new shoots are shorter, the stem branches begin to droop, the baldness begins to bald, and almost only results at the surface of the canopy, and the yield is reduced. The main task of pruning is to update the branches and branches of branches, increase the tree vigor, and extend the economic life. Use a small, well-developed, back-to-back branch in the lower middle. Or in the more upright branches retraction, prompting budding germination and regeneration. Appropriate to the appropriate position of the branches, to use the training as the backbone of the branches and the results of the branches. For the result sticks and result sticks, in keeping with the principle of “weaken and stay strongâ€, we choose to retain the strong sticks and the strong buds for the update and pruning. If the tree vigor is extremely weak and it is difficult to renew it, it is possible to carry out major tree renovation in the 10-75-year-old part of the main lateral branch and the large branch group under the premise of strengthening the management of fertilizer and water. Once completed, a large number of new shoots can be germinated in the same year. Summer buds, topping and winter pruning, the second year can be flowering results, restore a certain amount of production. China Agricultural Network Editor