The suitable tree shape of sweet cherry is Camptotheca acuminata, and it should be low-dry and short-crowned when shaping. The stem is 30 ~ 40 cm high, and the meristem has 3 ~ 5 staggered and evenly distributed branches as the main branches (opening at 30 degrees). 5 ~ 6 oblique branches are reserved for each main branch as side branches (the opening angle is 70 ~ 80 degrees), and bearing branch groups are planted on them. The tree shape is round or oblate, and the crown height is controlled at 2.5 ~ 3 meters.

Schematic diagram of happy tree

1. Overlooking 2. Duiyan

prune

(1) winter scissors

(1) young trees. In order to make young trees bear fruit early, the pressure should be reduced, the branches that are too dense, cross and disorderly should be thinned, and the annual branches of/kloc-0 should be appropriately shortened. For 3 ~ 4-year-old trees, the main branches and extended branches of lateral branches should be cut short, generally 40 ~ 50 cm. The remaining branches should be picked in summer, and pruning should be as little as possible. Where the number of branches is slightly dense, the branches can be placed horizontally, and the short branches of 5 ~ 20 cm are not cut. For varieties with erect branches, the method of "pushing the buds outward" can be used to open the corners.

② Full fruiting period. If the main branches and side branches are properly shaped, they can't be moved except for cutting off pests and diseases. The extension branches at all levels exceeding 40 cm, 1/3 can be cut off, and the extension branches below 40 cm cannot be cut short. When cutting short and extending branches, pay attention to leaving outer buds when cutting mouth buds. For 1 annual development branches, the clustered branches over 40 cm should be cut short. Generally, you can go to the top bud or wear top scissors at the junction of spring and autumn buds. In summer, the core of the short cut strong branches is removed, which slows down the growth and promotes the short branches and foliage branches. The fruiting branches that have been fruiting for about 4 years are updated in a planned way, and there are good branches in the contracted branches. Improve the angle of branches and enhance the growth potential.

③ Old trees. Mainly to update the crown and cultivate new branches. The regeneration of big branches should be carried out in batches. When updating a big branch, if there is a strong side branch on it, it can also be updated at the upper end of this side branch and cultured as the main branch in the later stage. Sometimes, the long branches in the crown can be kept and pruned again to cultivate new main branches.

(2) Summer scissors

1 Pick the heart. 1 ~ 3-year-old trees grow vigorously, so it is necessary to increase the number of branches by coring in summer to accelerate crown expansion. Picking time should not be too late, generally do not pick again after the end of July.

Pull the branches. Branching can relieve the tree vigor, alleviate the contradiction between growth and fruiting, increase the number of branches, especially the number of short and medium branches, increase the number of flower buds and increase the yield at an early stage. When pulling branches, the angle of branches can be 60 ~ 80 degrees. The branching time is usually around the spring buds in the second to third year after planting; If the branches are pulled too early and the sap has not yet flowed out, the branches will be hard and easy to crack. After mid-May, the branch was pulled late, which had little effect on the flowering in that year.