The poor protection of fruit trees by cutting kerfs can result in poor wound healing, serious rot infection, and damage to trees. In most cases, rot disease occurs at the most in the cleavers.
First, how to protect the saw blade
Special attention must be paid to everything from pruning to cutting the mouth.
1, try to avoid the absolute low temperature trim. The so-called absolute cold weather refers to the severe weather in March and April. Absolute cryogenic trimming can lead to cut-off frostbite, affect nutrient delivery in the coming year, and is prone to infection with rot and deficiency.
2. When pruning, attention should be paid to the number and position of the larger slashers in the whole tree. In particular, there should not be too many large wounds on the trunk, otherwise it will affect the tree vigor.
3. Try not to leave piles when you go to big branches. If the pile is too long, it will easily rot inside the kerf area until it spreads to the trunk. Some people think that keeping the pile longer and removing some of it for a while will help protect the trunk. This idea is wrong. If you don't leave piles, it's not easy to cause rot. Why do you need to keep piles?
4, to cut the mouth to smooth. There should be no burrs left, especially if the larger kerfs are to be smoothed with a sharp knife to facilitate healing.
5. When using scissors to cut branches, be sure to use a large edge. The crushing of the small blade on the remaining branches is easy to provoke rot. When the small blade is on the crest, it is crushed on the removed branches and the remaining branches are smooth.
6. For fruit trees with rot, viral mosaic, etc., use different cutting saws when pruning. The use of a cut-off saw on a diseased tree to use on a tree can lead to cross-infection of the disease.
7. After cutting, you must apply a cut kerf for protection. This medication is very important. Cutting and sealing the wound while cutting it can not only prevent the loss of water, but also prevent the infection of rot bacteria and promote healing.
8. The wound is protected with clay. The larger wounds are gelatinized with colloidal slime and then wrapped in plastic film to prevent invasion of diseases and insects, reduce wound water dispersion and facilitate healing.
9. The wounds on the main trunk or large branches can also be bridged in the spring of the second year to connect the upper and lower parts to promote healing.
Second, the clever use of cutting saw mouth
1, adjust the direction of branches. According to the growth space of the shoots, appropriate short cuts prompt the buds under the cuttings to change the growth direction of the original shoots and grow rapidly; for the back branches or the migration long branches, they can be changed into oblique branches or new ones by retraction. The result was that the branch group weakened its vegetative growth advantage, eased tree vigor, promoted reproductive growth, and earlier flowering results.
2, adjust the results of branches. For overgrown main branches or branches, more branches are made at the base, more wounds are created, growth potential is weakened, growth is reduced to control the growth of shoots; large branches or remnants on backs, sides, or other places are removed. When sticking out, if there is a large space after all the evacuation, you can use sparsely. That is, a 0.5-2 cm segment is left at the base of the sparsely removed branches, allowing the base to sprout small branches to occupy space.
3, clever use of cut on the back sprout, prevent sunburn trunk. When removing large branches on the back, if the surroundings are too empty, it is easy to burn the main branch in summer, and it is intentional to leave some short piles in winter to allow it to sprout branches in the coming year. These branches can play a role in blocking the sunlight, which is equivalent to the "parasol" of the main branch.
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