Peach trees have a strong vitality, a strong branching ability, and a dense crown, affecting the light of the interior. The peach tree is very hi-light and it is easy to cause the shoots to die when there is not enough sunshine in the interior. After the fruit branch was added, only the long branches were drawn at the top and the short branches were formed at the middle and lower parts. Therefore, it is easy to form light inside the crown, and the phenomenon of rising and shifting of the resulting parts will affect the yield. In order to solve these problems, in addition to strengthening the management of soil, fertilizer, and water, the pruning method should be used to control the extension of the tree crown, improve the lighting conditions, trim the weak branches and the resulting branches, and stabilize the result areas so as to achieve the main results and ensure the yield. . Peach tree update pruning method mainly has the following two kinds:
First, when the single branch updates the result, the lower part will draw the branch at the same time, and the winter branch should leave a strong branch. One is to use a short cut method, leaving 2 to 4 flower buds at the base of the resulting branch. This will allow the results to be obtained while pulling out the shoot tip from the base of the shoot. The second is to use long-term methods (usually used in the higher distribution of flower buds or fruit softer varieties), that is, in the middle and upper branches, leaving more fruits, let it droop naturally, prompting the next pumping new shoots. In winter, all the above parts of the mast must be cut off, leaving only one branch to prepare for the coming year.
Second, the two-branch renewal is better when the tree vigor is weak, the fertilizer is insufficient, or the basal shoot regeneration ability is poor. That is, only 2 to 3 buds are cut at the base of the shoots. After the new shoots are selected, two are left, and the upper branches are gently cut and long-distanced. As a result, 2 to 3 buds are left on the lower branches and the hair is cut. Long branches, used as updates. In winter, the upper branches were cut off from the base and the mother branches. The two pruning methods on the lower branches were the same as those in the previous year, ie, the upper branches were long and long, and the lower branches were cut as the new branches. Every year thereafter, the result is stable and does not rise too fast.
When the tree is aging, it can also be updated with pruning. Peach tree aging showed a large increase in the number of crown branches, and the phenomenon of dead branches was obvious. The result was a severe increase in the number of branches and branches, fruit drop, small fruit size, decreased quality, and a significant reduction in yield. The current period should strengthen the amount of pruning on the basis of strengthening the management of fertilizers and water and controlling pests and diseases. The crown is retracted at the perennial branch of the trunk to stimulate growth and protect the tree. However, care should be taken to retain the branch with the ability to produce a result, in order to ensure the production of the year. Using leggy branches and leaf groves to fill in the gaps and fill the gaps, to achieve the purpose of tree crown renewal and rejuvenation. When the main branch is extremely bald and there is no good branching downwards, as long as the main branch has normal skin color and there are no signs of rot in the xylem, the strength can be updated in any site where large branches have been grown, even if the pressure is reduced to 1 to 2 levels. Branches can also stimulate a lot of strong shoots and be well-trained. In 2 to 3 years, new canopies similar to those of the primeval tree can be formed, and yields are significantly increased.
and are supplied sterile.
airways are single use, latex free and are supplied sterile.
Most endotracheal tubes today are made of polyvinyl chloride, but special tubes made of silicone rubber, latex rubber, or stainless steel are also widely used. Most tubes have an inflatable cuff that seals the trachea and bronchial tree to prevent air leaks and inhalation of stomach contents, blood, secretions and other fluids. Catheters without a capsule may also be used, but their use is mainly limited to pediatric patients (in young children, the cricoid cartilage is the narrowest part of the pediatric airway and usually provides an adequate seal for mechanical ventilation).
Types of endotracheal intubation include oral or nasal, with or without a capsule, prefabricated (e.g., RAE (Ring, Adair, and Elwyn) tubes), reinforced tubes, and double-lumen endobronchial tubes. For human use, tube ID sizes range from 2 to 10.5 mm. Sizes are chosen based on the patient's body size, with smaller sizes used for pediatric and neonatal patients. Tubes larger than 6 mm in diameter usually have inflatable cuff. Originally made of red rubber, most modern tubes are made of polyvinyl chloride. Those placed in the laser field could be flexible metals. Robertshaw (and others) developed a double-lumen endobronchial catheter for thoracic surgery. These allow ventilation from one lung while the other collapses, making surgery easier. After the surgery, the deflated lung is re-inflated to examine the fistula (tears). Another type of endotracheal tube has a small second luminal opening above the inflatable cuff that can be used for aspiration in the nasopharyngeal area and above the cuff to aid in extubation (removal). This allows the aspiration of secretions located above the cuff, which helps reduce the risk of chest infection in patients with prolonged intubation.
Disposable Endotracheal Tube
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