Adjusting the tree structure
If the pear tree has large branches and chaos, the crown is tall, the strong and weak is weak, the peripheral branches are dense, the hollow is empty, and the result is shifted outwards, the following pruning measures can be taken:
1. Adjust the tree shape due to the appropriate conditions of the tree. Retract the large, excessively long, large branches that are left as main and collateral. 2. Reasonably sparse the cross-branched and overlapping branches of the internal organs, and eliminate the dry branches, diseased shoots, and thin and weak branches. 3. For the main, lateral branches grow upright and thick perennial competition branches, dense and space-free from the base sparse, both sides of the space from the lower part of the retraction. 4. For the posterior bald light leg branches and weakening collaterals retracted to a robust site to promote strong growth. 5. For the sagging result, the branch group retracts to the strong branches and raises the branches. The short fruit branch groups with too many dense inner branches are weak and strong, and stay straight and stay away. After several years of pruning and transformation, it finally achieved ventilation and light transmission, and the total branch amount and leaf area coefficient tended to be reasonable. Diseases and insect pests reduced year by year, and peripheral results gradually turned into internal and external three-dimensional results.
High flowering branches
In order to increase the inner part of the indica and complement the pollinated tree, shoots sprouted from the bare part of the branch can be used to obtain the high branch. Select one-year squid for stout and full-filled buds on the tree of the same variety or pollination type, leave 2-4 buds, and use high-cutting or splicing methods in early spring. According to the survey, the highest plant yield in the year of high tree accession was 13 kilograms higher than that of the unplanted plant.
Disease prevention and pest control
The main diseases of pear trees are black scab, black spot, etc. The main pests are pear, pear, woodworm, and moth. Every year, the garden is completely cleared in winter to scrape off the skins on the trunks and branches. Before spraying, 3 to 5 degrees of Baume Lime Sulfur Mixture plus 500 times of sodium pentachlorophenol are used: After germination to before fruit ripening, the occurrence rule of major pests and diseases , spray once every 10 to 20 days once bactericidal, insecticide mixed pharmaceuticals, spraying 4 to 6 times; late in the fruit harvest spray 1 to 2 times long residual period of sterilization, insecticide mixture to prevent early defoliation caused by pest outbreaks .
Scientific fertilization
After the fruit is harvested in late August, the special compound fertilizer for fruit trees is 1 to 1.5 kg. In addition, in combination with spraying, spring shoots are sprayed 1 to 2 times with zinc sulfate and magnesium sulfate, and sprayed with 3 to 5 times of potassium dihydrogen phosphate and urea after fruiting.
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