Grafting of walnut trees

Tree pruning method at full fruit period The pruning of walnut trees refers to the generalized pruning, that is, pruning and pruning. Different ages of trees have different pruning tasks. The pruning of saplings is based on plastic surgery, and the cultivation and maintenance of the high yield tree is continued. The pruning of the first fruit tree is to continue to cultivate the backbones at all levels and to make full use of the early results of the auxiliary branches and to adjust the master-slave relationship of the main branches at all levels. Balance the tree potential, actively cultivate the result branches and branches, and increase the result area; pruning during the fruit period is to regulate the relationship between vegetative growth and reproductive growth, improve the ventilation and light transmission conditions of the tree, maintain the robust growth of the result branches, and prolong the full fruit period.

(1) Pruning of stem branches and peripheral branches. Because of the extension of the backbone branches for many years, the resulting parts moved outwards, the apex sagged, and the hind legs prone to leggy branches. In the early fruit period, the main branches continued to expand and they should continue to cultivate strong skeletons. The timely control of the extension of the head behind the head to maintain the growth of branches. When the main branch does not need to be extended, the head can be changed repeatedly and the outward expansion can be controlled. The tree that grows vigorously, the extension branches tend to be upturned, the main branch stands upright, and the back branch should be used to open the angle.

When the canopy reaches its maximum, the height of the tree can be controlled. The trigeminal branches are used to drop to the top, and the top branch is used instead of the original one. The purpose is to reduce tree height and improve ventilation and light transmission.

The branches around the canopy should be retracted and removed in a timely manner because they are densely crowded, because the dense peripheral branches can cause insufficient light in the interior.

(2) Results of the cultivation and pruning of sticks. Based on the cultivation of the early fruit period, it is necessary to continue cultivating the results of the branch, and do a good job in updating and rejuvenation. Results The configuration of branches and branches should be combined with large, medium and small scales and evenly distributed on the main lateral branches at all levels. The overall distribution within the canopy is large, small, small, small, and not dense on the outside, the interior is not empty, and the permeability is good. Maintain a distance of 0.6-1.0 meters.

RESULTS: The method of culturing the branches was as follows: (1) The large and medium-sized auxiliary branches on the branches were reconstructed into large and medium-sized branch groups; (2) The strong developmental branches were used, and the first-placed retraction method was used to make the weak and straight. Stay flat and train into small and medium fruiting branches; 3 Use the internal branch's leggy branches to combine summer tossing and transform fruiting branches.

In the pruning of the result sticks, the overpowering branches should be sparsed over Wangzhi; for the debilitating branches that have been the result of many years, they must be promptly retracted and renewed to promote new shoots; Due space should be extended to shorten the length of the head in order to promote prosperous growth and forward extension. Branching on both sides of the appropriate amount of retraction can promote the growth of the prolonged branches; the excessively dense branches can be shrunk and can be sparse. Improve permeability, and make the strong Wang branch bending extension, can inhibit the branches and prosperous; For the short and weak fruit branches and male flower branches in the branch group should be removed in time to weaken the strong, to promote the results of the strong growth of branches , extend the result year. The medium and long-term fruiting branches have strong and continuous results, and should not be short for such branches.

(3) Utilization of leggy branches. After the walnut tree enters into fruitful period, many internal branches of the internal organs are easy to invade. If there is space, timely retraction after branching can be transformed into the result stick group to enrich the internal canthus, supplement the space, and increase the result position.

For branches with long branches and branches, it is better to choose a medium-sized tree with a length of 60-80 cm. After 1 year of slow release, the next year will be retracted at the appropriate branches.

Neighbourhood upright branches, such as high branches, affect the internal light, should pay attention to retreat, to stay straight and grow diagonally.

(4) The back of the branch. The back branches that were born on the main lateral branch of the first layer were prone to inversion and could be removed from the base in the early stages. In the upper branch of the crown in the upper branch of the main branch of the back, according to the main lateral branch angle and size of the decision to stay, open angle should be sparse, the angle can replace the original, expand the opening angle of the branch . For moderate growth and flower buds that have formed, appropriate retraction can be performed after the results and transformed into fruiting groups.

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