The role of engraving
After the seedlings are planted or the branches of the tree are buds, the shoots can be oriented. The saplings are skewed and the buds balance the tree structure. The buds can be extracted from the buds. Branches with horizontal branches and angles are opened, and buds are budded on both sides of the branches and under the buds before germination. The germinated branches can compete with the buds on the back for water and nutrients, inhibit the germination of the buds on the back, and effectively reduce the strips on the back.
Time and purpose of engraving
The spring buds of apple trees are carried out from 15 to 30 days before germination to the early stage of germination. The general time is from mid-to-late March to mid-April. When the time is too early, the wound will lose the water in the tree, and the buds will lose water and freeze. In severe cases, they will die dry.
Specifically, the germination time depends on the purpose of the bud. In order to extract long branches, the buds should be early (15 to 30 days before germination), deep (to the xylem), wide (width greater than the width of the bud), and close (about 0.3 cm from the bud). In order to extract short branches, the buds are late (in the early stage of germination), shallow (to the xylem, but not the xylem), narrow (width less than the width of the bud), and farther (about 0.5 cm from the bud).
Several methods of engraving
The bud is 0.3 to 0.5 cm above the bud of the dried fruit branch, and the cortical screen or a small xylem tube is cut with a knife or a small hacksaw.
1. The center is dried to extend the buds of the branches. 1 to 3 years old strong saplings, newly built in the same year for the strong seedlings from the fourth bud under the cut dry cut, dry height of 70 cm or more, every 3 buds carved 1 bud. The branching part of the biennial part and the upper and lower 20 cm can be made without branching; the direction of the branching is 70-100 cm in dry height, preferably the short branch bud is selected, and the bud marks are selected when there is no short branch bud. The plastic belt has 3 to 4 branches on all sides.
2. The main branch and the main branch extend the buds of the branches. For each year, the buds and the lateral buds of the annual branches are engraved with a bud every 3 to 5 buds. The buds are engraved in the circle, and the germination is 30 to 40 cm in the same direction. The branches are oriented to promote the formation of medium and short branches, and try to avoid overlapping. Generally only in the middle, the tip is 20 to 30 cm, and the base is 20 cm.
3. Auxiliary cultivating branches and buds of the vegetative branches on the main branches. For annual branches with a length of 50 cm or more, except for the top 20 cm and the buds within 20 cm from the center are not scratched, all the buds are wounded, combined with pulling branches, slowing the branching, promoting the formation of short fruit branches and strings. Flowering branches make early results and early yields of young trees.
4. The buds of the missing parts. It is mainly for the lack of the main branch, the auxiliary branch and the branch group. The short branch or the leaf branch is selected to be scratched or injured from the bud, which can promote the new shoot and supplement the missing branch. In the 2 to 3 year old parts, the short branch buds are selected in the direction of the lack of branches, which causes the middle stem to have a long branch every 8 to 15 cm, and the four sides turn into a circle, preferably spiraling upward. The relationship between the annual branches and the long branches is not very large. As long as a short branch can be produced, it is easy to produce long branches in the next year.
Points to note
1. Carved buds are only suitable for buds with low germination rate, difficult to form medium and short branches, or difficult to grow flowers, insufficient branches, and strong saplings, or 1 to 3 years old branches.
2. The bud should start from the annual branch, and the bud on the annual branch is the best. The weak tree and the weak branch should not be engraved, not even continuously.
3. It is necessary to sculpt the buds into branches and balance the tree. More carved side buds, less on the back of the buds; for the thick branches to be more engraved, the thin branches are less engraved; the side branches should be more buds, the main branches should be less buds.
4. The knife or scissors should be used exclusively and disinfected frequently to avoid infection when wounded.
5. In the windy and dry climate in spring, the wound can best leeward and prevent rot.
6. The method of engraving should be correct, not too long or too short, too deep or too shallow, too close or too far, and can not damage the buds.
7. The buds should be picked up from the saplings of the young trees, and the effect is good on the branches within 3 years.
8. Combine engraved buds and pull branches to receive the best results.
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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.
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