1 young walnut trimming technology The production of early walnuts is dry and weak. Appropriate to use happy-shaped. The late-doing walnuts are strong in dryness, and it is preferable to use sparsely layered shapes; the mountain walnuts are easy to cultivate happy shapes; the sparsely planted gardens and mantle single-line trees, flat ground and high management levels are used to cultivate evacuation layered shapes. The evacuation layered shape has 6 to 7 branches and 2 to 3 layers spirally formed on the center leading stem to form a semicircular or conical tree crown. Ten-hearted leadership without leadership, there are 2 ~ d main branch. For example, if the saplings reach a certain height after the planting, they can be dried. Early walnuts are dried at 1.2-1.6 m (0.8-1.2 m in height) and 1.7-2.0 m (dry-high 1.2-1.5 m). For strong branching varieties or planting conditions are good. Take short cuts; weak branching varieties or planting conditions when shy. Select the main branch to determine the trunk height. Early-mature walnuts have strong sprouting ability, and they will erase the following buds when they are dry. In the year or the second year, above the height of the trunk, three branches with different orientations and strong growth are selected as the main branch of the first layer. Early walnuts for 4 to 5 years and late real walnuts for 5 to 6 years are selected to leave the main branch of the second layer, and the distance between the first layer and the first layer is 60cm for early solid walnuts and 80cm for late real walnuts. On the side branch. The length of the first branch from the base of the main branch, early solid walnut 60cm. late real walnut 80cm. Early solid walnuts 5 to 6 years. The late real walnuts were cultivated from the 7th to the 8th year of life to cultivate the upper branch of the second main branch and the main branch of the third layer. After leaving the main branch, he fell out happy. Grafted walnut seedlings will enter the fruiting stage 5 to 6 years after planting. At this time, all kinds of backbone sticks were not yet fully equipped and the tree growth was strong. The results have increased year by year. Pruning attention: First, continue to cultivate the main and lateral branches, adjust the growth potential of the backbone branches at all levels. Make the skeleton firm. Balanced growth. The crown is complete. Increase the load; Second, under the premise of not affecting the growth of the backbone, the use of supplementary rearing branches and early high yield. 2 Results Walnut Tree Trimming Technique Walnut trees have entered the fruit period in about 15 years. The pruning task at this time is: continue to cultivate high-yield trees and improve ventilation and light transmission conditions. To prevent the relocation of the affected parts, to cultivate and update the rejuvenation results of various branches, withered the growth and the ability to produce results, prolong the full fruit period, and obtain high yield and stable yield. The specific method is: falling head happy. Tree height exceeds line spacing. When the growth affects light, the walnut tree pest control technology uses a certain amount of three-weighted branches instead of the tree head, and it is dropped every year to the top. Go to the big branch to make room. The large branches affecting the growth of the main and lateral branches were sawn from the base, and 1 or 2 branches were sawed off in 1 year. The branches were removed year after year, and the folds, wells, and cross branches gradually retracted. In the sun shines. For the apex weak down drooping branches, tight squeezed righting branches, overlapped branches for appropriate questioning or retraction, so that "the outer side is not crowded, the inside is not empty." Incremental new branches. Bare twigs, under litchi proper retraction. Raise the angle. Use splinters to take the lead. Zhizhi group to maintain output. The pruning method for cultivating large, medium, and small fruiting branches is as follows: First, put the shrinkage first. The mediocre body was dumped for 1 year. The second year trim. Direct the branches to the sides; For the first year of the mean tree branches, 5 to 7 buds are short-cut. Promote branching. The second year went straight and left the weak branches. Promote its flowering results. In addition, after trimming. Intestinal buds sprouted in the inner branch. Strong growth potential when pruning in summer. Attention should be paid to enriching internal organs, supplementing space, and increasing the number of results. 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