After planting, dry it at 70 cm. When cutting in winter 1 year, three branches evenly distributed in directions were selected from the new branches sprouting within 30 cm below the cutting mouth, which were used as the main branches for culture, leaving 60 cm short nodes; The remaining branches have thinned down. Three main branches will be pulled in the growing season, and the angle of pulling branches will be determined according to the requirements of the tree.

In the second year of winter cutting, 1 lateral branch is selected for each main branch, and the three main branches are kept on the same side as far as possible; The extension branch of each main branch has a short section of 60 cm. In the winter of the third year, the second branch of each main branch is selected on the opposite side of the 1 branch, and the branch is extended or lightly cut. Pay attention to pulling the main branches according to the requirements of the tree every year. Generally, plastic surgery can be completed in 3 ~ 4 years.

2. Pruning of trees in full fruit period

Pomegranate trees in the full fruit period should maintain the crown of "fine on the top and dense on the bottom, fine on the outside and dense on the inside, dense on the big branches and sparse on the small branches", and remove redundant flourishing branches, excessive branches, internal branches, cross branches, overlapping branches, concurrent branches, pest branches, dead branches and twigs. Pay attention to adjusting the balance between tree growth and fruiting, thinning some flourishing branches in winter, leaving as many fruiting mother branches as possible, and pulling branches in growing season; ? Weak trees should pay attention to the retraction and rejuvenation of weak backbone branches, the retraction and elevation of drooping branches, and the renewal and rotation of branches.

3. Pruning of old trees

Old trees mainly adopt retraction, rejuvenation and regeneration measures.

(1) Recover the aging main side branch pipe.

For the main lateral branches that are drooping and weak in front, they are retracted to the upward growing branches to restore their growth potential; For the main lateral branches with bare back, they should be retracted to the back branches, or new main lateral branches should be gradually cultivated by using the branches sprouting or overgrowth on the back in the second year combined with the branches pulling in the growing season.

(2) One-time renovation

Saw the old plants off the ground in winter. In the second year of winter cutting, 1 ~ 3 buds were selected as the new trunk and then cultured.

Extended data:

Topdressing method of pomegranate in summer:

The horizontal root groups of pomegranate trees are generally distributed on the periphery of crown projection, so the depth and breadth of fertilization should change from inside to outside and from shallow to deep year by year with the increase of tree age.

1, annular furrow fertilization

This method is suitable for pomegranate orchards with flat terrain. An annular ditch with a width of about 50 cm and a depth of 25-40 cm is dug at the periphery of the vertical projection of the crown, and the foliar fertilizer of the lying stone nest is mixed with the topsoil and applied into the ditch to cover the soil. This method is mostly used for young trees and has the characteristics of simple operation and economical fertilizer use. However, digging ditches is easy to cut off horizontal roots and the scope of fertilization is small.

2, radial furrow fertilization

Dig 4-8 ditches radially outward from the trunk at a distance of about 1 m under the canopy, with a width of 30-50 cm and a depth of 15-30 cm, and apply the fertilizer and soil after mixing them evenly. This method is suitable for topdressing trees in full fruit period and fruit trees in growing season. Digging along the direction of horizontal root growth during ditching will cause less root damage, but large roots should be avoided during ditching. The position of the radiation ditch can be changed every other year or at regular intervals to expand the fertilization area and promote root absorption.

3. Cave fertilization

Under the crown projection, dig fertilization holes from the trunk 1 meter away to fertilize. Some areas use special fertilization cones, which are very convenient to use. This method is mostly used for topdressing during the growth period of fruit trees.