The drying height is about 80 cm. If the stem is set too low, it will take a long time for the main branch to extend to the shed surface, which will also affect the cultivation of side branches; If the stem is too high, the upper branches will easily exceed the shed surface, bend too hard when binding, and easily break new shoots, which will affect the growth and culture of the tree and delay the fruiting period.

(2) Cultivating main branches

After the stem is fixed, carve 3 ~ 5 full buds under the incision to promote branching. In mid-July, 3-4 robust branches growing in different directions are selected as the main branches for culture, and the branches are pulled to the barbed wire at the top, with the bottom angle of 40-50 degrees and evenly distributed in space according to the appropriate orientation. When the wires can't reach, the branches are hung on the wires of the scaffold with wires, leaving no central branches. When the number of main branches is insufficient, the gap can be made up by grafting strong branches and strong buds, which can be used as the third and fourth main branches for culture.

(3) Continue to cultivate the main branches and select and keep the lateral branches.

In the second year after planting, leave strong buds and 3/4 ~ 2/3 short branches. Continue to maintain the polar growth of main branches, promote the growth of grafted branches and buds, so that the growth of the second and fourth main branches 1 year can reach a balance between strength and weakness. Select two side branches on each main branch, the distance between the first side branch and the main branch is not less than 60 cm, the second side branch is opposite to the first side branch, and the distance between the two side branches on the main branch is more than 30 cm. The buds on the left side branch must be new buds sprouted from the side buds on the main branch, and the buds on the back, lower branch and other branches should be wiped off. The direction of the left branch should be staggered to avoid crowding out the side branches and branches in the future. After selecting lateral branches, when the height of the tree exceeds the shed surface, the main branches and branches with lateral branches exceeding the shed surface are bound on the shed frame. When tying, first choose the extension direction of the main branches, try not to overlap, and then try to lay the branches flat and fix them as far as possible, leaving strong buds and cutting off the tips. The binding method of lateral branches is basically the same as that of main branches, and the spacing of lateral branches on scaffolding should not be less than 1 m.

(4) Continue to cultivate the main side branches, and select and keep the auxiliary side branches.

After two years of growth and development, the skeleton of the tree has basically taken shape in the third year. Further adjust the subordinate relationship between the main branch and the side branch. Each side branch should cultivate two secondary side branches, so that the tree can form a crown with three main branches, six side branches and 12 secondary side branches. In the early fruiting period, the main branches and auxiliary branches continue to be tied on the shelf in the fourth year until they are covered with the shelf surface.

In this plastic method, the 2-3-year-old part within 2 meters around the trunk can only be hung into a funnel-shaped structure. After reaching the height of the trellis, the 3-4-year-old main branches and lateral branches are bound into a horizontal structure along the horizontal direction of the trellis, and the height difference between the main branches and lateral branches is about1.2m. ..

(5) Pruning of adult trees

After entering the full fruit stage, the main objects of plastic pruning are lateral branches and branches, and the extended branches of the main branches and lateral branches continue to extend horizontally, always maintaining the growth advantage of the top of the main branches and maintaining a certain relationship between the lateral branches and the auxiliary branches. The apex of the extension branch of the main branch should be kept upright, and the apex of the side branch should be kept at an angle of 45. Excessive competitive branches and other secondary side branches should be thinned out to make the branch spacing about 20 cm. The tree structure of the grid changed from the initial funnel structure to the later plane composite structure. The height of scaffolding is 1.8 ~ 2m, but the actual height of fruits and branches hanging on the ground is only 1.6 ~ 1.8m, which is just suitable for manual operation.