The natural open-shape fruit tree has the advantages of sound tree frame, distinct branch branches, strong bearing capacity of the tree, good ventilation and light transmission performance, high yield and stable production, etc., which is beneficial to improve the quality of the fruit, and has the characteristics of easy forming and easy popularization. Naturally happy-shaped canopy is mainly applied to apple, peach, plum, pear and other deciduous fruit trees. The specific cultivation methods are as follows: Year 1 trim After the seedlings are planted, they shall be set at 70 cm. If the seedlings are not dry, they will be short at full shoots and will be dried again in the next winter. When pruning in winter, select 2-3 new shoots with strong growth and similar growth near the clipping buds, and cut short at the full buds to cultivate the main branch. The new shoots cultivated as main branches should be arranged at an angle of 120 degrees each other, with each branch being 15-20 cm apart. If no three main branches are selected at a time, two branches will be selected as the main branch and the second main branch will be selected at the second winter cut. The tree of the three main branches has been selected and no longer the main extension branches. If only two main branches are selected, the trunk extension branch will continue to be reserved for the third main branch in the next year. The branches other than the main branch were slowly placed on 2-3 branches to support the tree vigor, and the rest were removed. For slow-release, branches and twisters should be used to control and prosper. Year 2 trim If only two main branches are selected in the first year, the third main branch is selected on the trunk extension branch and the center stem is removed at the third main branch. The third main branch has a 120-degree angle distribution with the main branch selected in the previous year, and is 20 cm from the second main branch. For the main branch selected in the previous year, the branch was cut at a length of 60 cm at the extension branch, and at the same time, a robust branch was selected at a distance of 50 cm above the middle to be a short branch, and the first side branch culture on the main branch was performed. A short 1/3 cut of a robust shoot was selected 15-20 cm away from the first lateral branch at the opposite side of the first lateral branch as a second lateral branch culture. Remaining branches put slowly, sparse branches. Year 3 trim Extension branches of the three main branches were truncated at 1/3, and a new branch with robust growth was selected at a distance of 60-70 cm from the second lateral branch under the extension branch and the third branch was cultivated. The third side branch should be born on the opposite side of the second side branch. The other branches were lightly cut and put slowly. The large interplanting space can be lightly cut, and the large and medium-sized fruiting branches can be cultivated. The small living space can be mainly slow-released and the small fruiting branches can be cultivated. Year 4 trim The main branches and lateral branch extensions were shortened, and 1/4 to 1/3 were cut off, and the remaining branches were lightly cut and slowly placed for the shoots. Remove branches from the back and cut the competition branches and dense branches. In winter pruning, according to the requirements of the tree structure, pull the branches to adjust the direction and angle of the main branch. At the same time, attention should be paid to the enhancement of summer pruning, easing up the growth of new shoots as a subsidiary support and fruiting branches, and promoting the formation of flower buds.
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