Winter pruning of jujube trees generally takes place after defoliation and before germination. However, it should be cut in order to prevent shearing. When pruning, different measures should be taken according to the growth characteristics and management level of jujube trees at different ages.
Saplings
1 after the fixed date jujube is planted, due to the slow growth, less than the thickness of the early growth or not strong enough, you can not cut, leave more branches, making it as bold as possible. When the tree is as high as 1.5 to 2 meters and the dry diameter is as large as 2 to 3 centimeters, it is truncated at an appropriate height. Generally, the pure jujube garden is dried at 1.0~1.2 meters, and the intercropping garden is dried at 1.2~1.4 meters. The dense planting garden may not be dry. Cut 15 to 25 cm under the incision is a plastic band. In the plastic band, 4 to 5 secondary branches are removed from the base to promote the emergence of a new jujube head on the main bud of the trunk to cultivate the main branch.
2 In the second year after the plastic and dry, choose to leave a branch that grows upright and stout as the center branch, and leave the branches with 3 to 4 directions in the lower part, and the branches with appropriate angles as the main branches of the first floor. The others are all removed. After the growth of these branches is strong, in the 3rd to 4th year, the same branch promotion method as that of setting is used to equip the main branches with lateral branches and two main branches.
Results of jujube tree pruning
The results of the renewal period were mainly to delay tree aging and delay results. Therefore, the method of retraction is mainly used to retract part of the penetrating trunk, and other weak branches are also retracted accordingly. Generally retracted to the strong vitality of the jujube buds. After retracting the backbone branches, a new jujube head is promoted, and the main branches can be gradually cultivated into extension branches and side branches, and the internal condyle is enriched to supplement the space. If a new branch appears on the stem, it can be directly retracted to the new branch.
Old tree update
Pruning of old trees is a pruning measure for different ageing trees. According to the number of effective dates, corresponding pruning measures are taken separately.
1 Light update When the effective date stocks are between 1000 and 1500, a slight retraction method can be adopted. After cutting out 1/3 of the total length of each backbone branch, the tree vigor can be enhanced and the results can be continued.
When the effective date stocks are between 500 and 1000, they can adopt a moderate retraction method. The vitality of the selected branches is strong, and 1/2 of the length of the outstretched strands and latent buds are sawed out. To make it sprout new branches, while strengthening the tree management, raising trees for 1 to 2 years (not A), can restore the tree potential, normal results.
3 re-updates are generally effective when the jujube stocks are between 300 and 500, and they must be renewed. The same stocks and potential buds should be selected and sawn off 2/3 of the branches to create new shoots and re-form the canopy. Strengthen the tree under the tree management, tree maintenance for 2 years (without opening A) to restore normal results.
To update the old tree, pay attention to the relationship between the master and the slave. Cut out the mouth with a wax coating to prevent cracking of the wound. Store the rain to rot. Backbone branch updates must be completed at one time and cannot be performed in batches. Most importantly, renewal pruning should be carried out on the basis of strengthening the management of underground manure and water.
Parenteral nutrition (PN) is provided intravenously as the nutritional support for patients before and after surgery and those in critical condition. Total nutrition from parenteralnutrition is called total parenteralnutrition (TPN).
TPN bag, TPN, EVA TPN bag, total parenteral nutrition bag,Enteral Feeding Set, Enteral Feeding bag, Nutrition Infusion, parenteralnutrition, IVH
Huali Technology Co., Ltd , https://www.jlhualitech.com