Young tree pruning Chai Quanxi pointed out that the pear tree young stage generally includes newly planted pear trees and young trees that have not yet yielded 4 to 5 years. Pruning of young pears begins with plastic surgery. After planting, saplings are cut at 80 to 100 cm and set to dry. After germination of new shoots, 7 to 8 buds are left in the plastic band at the top 50 to 70 cm, and 5 to 6 strong branches with different directions and uniform distribution are selected and cultivated. The main branch, all the rest are erased. After the main branch grows 50 to 70 cm, it is plucked or stopped short after growth is stopped, which promotes the secondary branch. Select the branches with strong growth, proper direction and angle as the main branch extension and side branches. The over dense branches, thin branches, diseased and insect branches and branches that disturb the tree shape on the main branch and the side branches are all cut off. The short-stem culture of long branches becomes the fruiting branch group; the short-to-medium branches are trimmed to the top, and the weak ones are slowly released; the branches with small angles are stretched, stretched, and other methods to expand the branch angle, ease the growth advantage of the top, and promote early flowering . Early fruit tree pruning Winter shears in this period are mainly used to cultivate backbone branches and branch groups. The pruning of the backbone extension branches must be shortened year by year, but the proper extension angle must be maintained to prevent the angle from becoming smaller and sagging. For varieties with soft branches, in order to prevent the angle from opening too much, you can first choose a suitable back branch and cultivate it as a new extension branch. When the thickness of the new extension branch is close to the original extension branch, cut the drooping branch head. , Can also be transformed into a back branch group. If the central stem is too strong, it should be properly controlled, that is, the second and fourth branches are used as the trunk extension branch. For the branches that have reached the standard height and the branches in each layer have left enough feet, the method of falling head can be used. , Control the growth of the trunk and promote the thickening of the main branches of each layer. After 2 to 3 years of slow release, retreat and trim. For the main branch lacking side branches, a suitable medium-long branch on the back can be selected. After a moderate short cut, branches are promoted, and then a branch with an appropriate orientation and angle is selected and cultivated as a side branch. The cultivation of branch groups should be treated separately according to the types of new branches that occur on the backbone branches. Fruit tree pruning Chai Quanxi pointed out that after entering the full fruit period, the pear tree began to have a natural renewal of emptiness in the inner chamber and the outward movement of the fruit parts. Therefore, we must solve the problem of gradually updating the result branches. In the early stage of the pear tree, the winter shears should complete the selection and retention of the backbone branches so that they continue to develop. The extension length of the selected backbone extension branches should be determined according to the tree potential, which is generally slightly shorter than the previous period. After 10 years of life, the length of the main branch to extend the cutting length of the branch should generally be placed on the upper part of the spring shoots. At this stage, attention should be paid to easing the tree potential and increasing the number of branches, especially those of short and medium branches, in order to help increase yields steadily. The main task of pruning the pear tree after it is fully fruited is to properly control the yield and maintain a strong tree vigor. Chai Quanxi emphasized that in this period, special attention should be paid to improving the light. The peripheral branches can be appropriately shortened, slow-released, properly sparse or retracted, and the peripheral branches reduced. For trees with dense trunks, thinning of large branches must be carried out annually. Senile tree pruning Chai Quanxi pointed out that for the aging pear tree, under the condition that the fertilizer and water are keeping up, it is necessary to retract in time, change the head and raise the angle, rejuvenate the branch group, and multi-use long branch cultivation branch group. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone Capillary Microcirculation Microscope
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Chai Quanxi emphasized that the number of young pears is small, and branches other than the backbone should be kept as few as possible; the long branches that do not affect the growth of the backbone should be slowly released; and the long branches that affect the growth of the backbone, It can be shortened appropriately, and the growth of long branches can be suppressed by reducing the height of the apex. 
Different pruning methods for different ages of pear trees
Recently, on the issue of Lishu's winter shears, the reporter interviewed Chai Quanxi, deputy principal of education and teaching and fruit tree expert of Lucheng Vocational and Technical Education Center, Hebei Province.