In recent years, the apple planting density has generally increased. After entering the fruit period, the population is closed, the lighting is poor, the quality of the fruit is reduced, and it is difficult to access and operate between the rows. In order to solve these problems, a high-efficiency tree transformation is needed, and the modification techniques are as follows: 1. The sparse layer of the small crown is transformed into an improved spindle or a large-end cone. The improved spindle-shaped stem height is 50-60 cm. The base of the whole tree has three main branches that are adjacent to each other. Each main branch is not equipped with lateral branches. The result is a single-axis extension of the branch. The opening angle is 70-80 degrees. . The central leadership has no longer developed the main branch (above the three main branches), but has directly established 4 to 6 large branch groups with uniaxial extension. The height of the tree is about 3 meters and the diameter of the crown is 3 to 4 meters. The structure of the conical tree at the end of the outsole is characterized by 5 to 6 main branches in the whole tree, 1 to 2 lateral branches in each of the three main branches of the base, and 2 to 3 smaller main branches in the central leadership. Lateral branches, their height and crown diameter with modified spindle shape. Second, a relatively small spindle-shaped transformation of the tree crown. Because there are many spindle-shaped main branches in dense planting gardens, the main branch position should be elevated as much as 1 m above the ground and the tree height should be kept below 2.8 m or 3 m, and 5-8 main branches should be retained. Eliminate round shoots, overlapping branches, dragging branches and dense branches. To go to large branches to be completed in 2 to 3 years, but according to the size of each garden branch, how much, distribution and other specific conditions. Third, the principle and method of removal of large branches. The principle of going to large branches: to stay long and short, to stay thick and thin, to stay low, to stay thin and thin. To go to the big branches in 2 to 3 years to complete, the first year should go 60% of the total, the second year should go to 30% of the total, the third year should go to 10% of the total. If you are in a small year, you can leave enough fruits to maintain the result and avoid losing production due to excessive branching. Fourth, the results of the cultivation and pruning of sticks. In order to cultivate the result of "branch-shaped" branches, we must pay attention to the result of selecting the strong branch, and use less pruning methods to "strengthen strength and stay weak". According to the pruning standard of 80,000 sticks per mu, the focus is to eliminate the dense branches, thin and weak branches, and strong branches at the base of the backbone, on the back, and on the periphery, and to choose the best results for the results of 3 to 6 years. Using large and medium-sized branch groups obliquely on both sides of the backbone branches or strong branches to cultivate the branches on the anticline, the result was "bead-type" sagging. The pruning method was mainly based on slow laying and sparse cutting. The lengthy branches were properly retracted and some short branches were renewed. The Wangzhi group was able to trim the pruning, appropriate more fruits, no heads, no caps, and no flower bunches. Weak branches help trim the pruning, cut branches on the branches or branches, and strong buds. The strong branches with space can start with a small amount, removing weak flowers, weak buds, and long branches on the branches, and removing the difficult-to-refresh branchlets. . Fifth, the problem of attention 1. Before reforming, it is necessary to review the tree and determine which tree to transform. 2. According to the planting density and the original tree shape, it is determined whether there are temporary strains and permanent strains, and the temporary strains are mainly based on the results when pruning, and the space for permanent strains and permanent strains are to be reshaped and the results are taken into account. 3. For a tree with a main branch height of 1 m or more that is transformed by a spindle shape, the main branch angle should be adjusted to 80 to 90 degrees. The angle of the main branch after transformation from the sparse layer of the small crown also needs to reach 70-80 degrees. Insufficient time to open the angle with support, pull, back branch change method. 4. Wang tree, golden tree, and weak tree should pay attention to the amount of pruning when they go to large branches. Do not prune all the large branches once in place. Some trees need to be considered in 2 to 3 years to complete, to prevent excessive pruning and excessive rushing. . Weak trees can't be too big at once. At the same time as the large branch, pay attention to the balance between the main branch, the upper branch and the lower branch, and the main branch before, middle, and rear branches. At the same time, we must pay attention to the size and year. For trees that are too weak for individual centers, not only can't do the work from the center, but at the same time pay attention to saw small, flat, smooth, can not split, and apply healing agent in time to protect the wound. 6. Go to the big branch to destroy the ground and underground balance, the tree tends to be easy to spread or cause the bar, pay attention to wipe buds, loosing, picking the heart, take branches, girdling and other summer pruning, but also control the use of nitrogen fertilizer on the limpid tree. 7. "Bead-style" results are the core of high light efficiency trimming, and the main point is to cultivate the results of both sides of the stem and peripheral branches at the same time as the large and medium-sized branch groups on the backs of the sparse stems. The pruning method is mainly based on easing, uniaxial extension, controlling the apical branching amount, and controlling the extension of the periphery. 8. For trees that cannot guarantee consecutive years of high yields, they can be circumcision, but they are not necessarily the main girdling. The main branch can be stripped of the main branch for the sake of balance and strength. In the event of a situation in which the weaker or weaker, weaker or weaker, and the like, there should be separate girdling against Wangzhi. 9. In the case of a large branch, there should be as few stays as possible for the twigs, so as to prevent the adjustment from affecting the yield. 10. Can not use paclobutrazol to control the crown of Fuji apple or promote flowering, because paclobutrazol affects the appearance quality of red Fuji apple fruit, and PBO can be used if needed.
Thread Fitting,Threaded Fitting,Stainless Steel Hexagon Nipple,Stainless Steel Threaded Fitting
Wenzhou Gaoya Light Industry Machinery Co.,ltd. , https://www.hongyafitting.com