During the dormant period of pear trees, from the deciduous to the next year, a small amount of nutrients still flow back in the direction of twigs - large branches - trunk - roots, and accumulated in the roots. Before the spring germination, the nutrients began to flow from the bottom to the top of the ground as the sap flows, and the order is exactly opposite to the reflux. Compared with the growth period, the tree activity in the dormant period is relatively weak, and the above-ground branches have relatively low storage nutrients, which is suitable for winter shearing. How to manage the pear tree dormancy period? The following management measures should be taken:
1. Pay attention to timely scraping the backbone and main branches and other old branches and roots, and burn them intensively to eliminate the wintering pests in the cracks of the bark; thoroughly cure the rot disease, the ring disease lesions, and immediately burn them.
2. Combine the winter shears, remove the pests and diseases, remove the diseased fruit, clean the leaves and fruit, and spray the whole tree once.
3. When the lack of fruit gardens is mastered, the whole garden is filled with water once, which can eliminate a large number of wintering pests, which is very beneficial for the safe wintering of fruit trees.
4. Winter pear trees have no leaves and are in a dormant state. Most of the stored nutrients have been transported to the roots and branches. At this time, cutting out the useless branches can save a lot of nutrients, which is conducive to the growth of trees in the next year and enhance the tree potential. The main tasks of winter shearing are crown shaping, branch bud adjustment, branch group renewal, smoothing various branches, fixing the growth angle and posture of the main branches, adjusting the size, density and structure of the resulting branches, handling irregular branches, and controlling trees. Total amount of branches and amount of flower buds.
5. The flower buds of pear trees are easier to identify. When winter shears, the trees are advanced and sparse. For excessive flowering branches, the number of flower buds is reduced according to the branching flower buds or moderately retracted. For the Xiaonian tree, it should be seen that the flower stays and the flower is cut, which can reduce the consumption of nutrients stored in the tree. The vegetative shoots are short-cut, and the branches are replaced to reduce the formation of flower buds in the coming year. Weak trees with no flowers or less flowers are selected for high-quality leaf buds, and excessive inferior leaf buds are cut off, which is good for improving the quality of new shoots, enhancing photosynthesis efficiency, and restoring tree potential.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
There are two kinds of external fixations for pelvic fractures, namely temporary fixation and therapeutic fixation.
Temporary fixation depends on on-site assistance. Assuming that the patient has serious open injury, severe hemorrhagic shock, and serious fracture dislocation, the rescue personnel will provide temporary external fixation support to maintain the stability of the pelvis, reduce secondary injuries, and correct the continuous aggravation of hemorrhagic loss on the scene. The therapeutic external fixation stent is used to correct the dislocation of the fracture through routine examination after admission, evaluation of the injury, and external fixation installation through treatment, maintain the relative stability of the fracture, create a very quiet environment for the fracture healing, and lay the foundation for the healing of the fracture. External fixation is an important method for pelvic fractures.
Pelvic External Fixation,pelvic ex fix,Pelvic External Fixator,pelvic fixator
Jiangsu Aomed Ortho Medical Technology Co.,Ltd , https://www.medthofixation.com