Pruning principle: most jujube trees that have been left unattended for a long time are invisible, the main side is unclear, the branches are messy, the branches are old and the tips are burnt, the flowers are many and the fruits are few, and the yield is low. Therefore, when pruning, we should master the principle of taking care of the current output and gradually transforming it.

Pruning method: firstly, sparse dense branches, sparse dense backbone branches that are seriously aging and weak and have no development prospects. Then the remaining backbone branches should be dealt with according to the situation. Sparse or retract those that are too dense, drooping and dry. Retraction should not be too heavy, so as not to affect the output too much. After the main branches are treated, as many branchlets as possible should be kept to ensure the fruiting ability. For the existing long branches on the tree, we should choose the ones with vigorous growth and good direction to cultivate them to replace the aging backbone branches to expand the crown. Too many branches should be cut off properly, and the rest should be cut short or topped according to the size of space, and cultivated into fruiting branches.

2, young tree trunk shaping method:

Fixed stem: After the jujube tree is planted, because of its slow growth, it is not strong enough and vigorous enough in the early stage, so it can be thickened and taller as soon as possible without cutting. When the tree height is 1.5 ~ 2m and the trunk diameter is 2 ~ 3cm, it will be cut off at a proper height. Generally, the trunk of pure jujube orchard is fixed at 1 ~ 1.2 m, and the trunk of intercropping orchard is fixed at 1.2 ~ 1.4 m, and the trunk of dense planting orchard can be indefinite. 65438+ 0.5 ~ 25 cm below the cut is the shaping belt, in which 4 ~ 5 secondary branches are removed from the base to promote the main buds on the trunk to sprout new jujube heads and cultivate the main branches.

Shaping: In the second year after stem setting, choose 1 branch as the central branch, leave 3-4 branches with good direction and suitable angle as the lower first layer main branch, and all others are thinned out. After these branches grow vigorously, in the third to fourth years, with the same branch promotion method as the fixed stem, the main branches are equipped with side branches and second-tier main branches.

3. Results Jujube pruning method:

Results The regeneration period is mainly to delay the senescence of trees and delay the fruiting, so the method of retraction is often used to retract some drooping main branches and other weak branches accordingly. Generally, it retracts to the rootstock bud with strong vitality of jujube trees. After the main branch is retracted, the new jujube head is pushed forward, which can be gradually cultivated into main branch extension branches and side branches, enriching the supplementary space in the inner room. If the updated branches are now on the main branch, they can be directly taken back to the updated branch.

Jujube trees at the first fruit stage: Pruning jujube trees at the first fruit stage is mainly to reduce the consumption of nutrients and increase the yield. Therefore, the over-dense branches except the central trunk, main lateral branches and large fruit branches should be thinned, and space should be reserved to cut off the terminal buds.

Jujube trees in full fruit period: Pruning jujube trees in full fruit period is mainly to maintain good ventilation and light transmission conditions in the crown, so that the density of branches and leaves is appropriate, so that the fruiting branches can bear a large number of fruits, rejuvenate and renew the fruiting branches in a planned way, and keep the fruiting branches longer. The first is to remove long, alternating, intersecting, parallel and overlapping branches. The second is thinning, cutting weak branches and too dense branches. Third, the top of the main branch stops and retracts appropriately. The fourth is to cultivate robust fruiting branches and fruiting mother branches.

4, the old tree update pruning method:

Updating and pruning of old trees is to take corresponding updating and pruning measures according to the number of effective jujube trees for trees with different aging degrees. Pay attention to the master-slave relationship when updating the old tree, and proceed in sequence. The wound should be waxed to prevent it from cracking and letting the rain rot. The renewal of backbone branches should be completed at one time, not in batches. Most importantly, the renewal and pruning should be carried out on the basis of strengthening the management of underground fertilizer and water.

Photoregeneration: When the effective rootstock of jujube tree is 1000 ~ 1500, the 1/3 of the total length of each main branch can be cut off by light retraction, so as to enhance the tree vigor and make the fruit continue.

Mid-term update: when the number of effective rootstocks of jujube trees is 500 ~ 1000, the method of moderate retraction can be used to cut off 1/2 of the total length at the rootstocks and latent buds with strong vitality on each main branch, so that it can sprout new branches, and at the same time strengthen tree management, so that the tree can be kept for 1 ~ 2 years, which can restore the vitality of the tree.

Re-regeneration: generally, when the number of effective jujube trees is 300 ~ 500, the re-regeneration method should be adopted. Similarly, strong seedlings and latent buds should be selected, and 2/3 of the main branches should be sawed off to sprout new branches and re-form the crown. Then we should strengthen the management under the tree, and after two years of tree cultivation, we can return to normal results.