After the leaves of the apple tree fall to the next year before budding, it is the pruning period in winter. If the cutting and cutting protection is not good, it will lead to poor wound healing ability, serious rot disease infestation, and damage to the tree. Therefore, care should be taken to protect the cutting edge when trimming.
When pruning, you should first pay attention to the number and location of the larger cutting cuts in the whole tree, especially if there are too many large cuts on the trunk, otherwise it will affect the tree vigor. Secondly, the cutting edge of the shears should be smooth, and there should be no burrs, especially the larger saw edge should be smoothed with a sharp knife to facilitate healing.
How to protect the cutting edge
Try to avoid pruning during the absolute low temperature period. The so-called absolute low temperature period refers to the severe cold weather of March 9 and 49. Pruning during the absolute low temperature period will cause frostbite of the cut, which will affect nutrient delivery in the coming year, and will be prone to rot and nutrient deficiency.
When removing large branches, try not to leave piles. If the piles are too long, they will rot inward from the saw cut until it spreads to the main trunk. Ordinary fruit growers believe that keeping the pile longer and removing the rotted section will help protect the backbone. In fact, this kind of thinking is wrong, and it will not easily lead to rot if there is no stake.
When using scissors to thin branches, be sure to have the big blade down, and the small blade's crush on the remaining branches will easily cause rot. When the small blade is up, the crush of the small blade is on the removed branches, leaving a smooth cut.
For fruit trees with rot disease and viral mosaic disease, different shears and saws should be used when pruning. The cutting saw used on the diseased tree and then used on the healthy tree will cause cross infection of the disease. Therefore, the cutting saw needs to be disinfected in time, otherwise the mosaic disease will be transmitted with the cutting saw, which will seriously affect the economic benefits.
After pruning, the cutting edge of the scissors must be applied to protect it. This medication is very important. Applying to seal the wound while trimming can not only prevent water loss, but also prevent the infection of rotting bacteria and promote healing.
Clever use of cutting edges
Adjust the direction of the branches. According to the growth space of the branches, cut the buds under the cut mouth appropriately to make them change the growth direction of the original branches and grow rapidly; for back branches or leggy branches, they can be changed into oblique branches or new results by retraction The branch group weakens the vegetative growth advantage, eases the tree vigor, promotes reproductive growth, and blooms and bears earlier.
Adjust the result branch group. For the overgrown main branch or branch group, there are more sparse branches at the base, causing more injuries, weakening the growth vigor, reducing the growth, to control the growth of the branch group; removing the large branches or leggy growth on the back, sides or other places When branching, if a larger space is formed after all the branches are thinned out, stubble thinning can be used. That is, leave 0.5 to 2 cm of branches at the base of the thinned branches, and let small branches germinate at the base to occupy space.
Use the cut sprout on the back cleverly to prevent sunburn on the main stem. When removing the large branches on the back, if the surroundings are too empty, the main branches will be easily sunburned in summer, and some short piles will be intentionally left during winter pruning to allow the branches to germinate in the coming year. These branches can play a role in blocking sunlight, which is equivalent to putting a "sun umbrella" on the main branch.
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