1. Winter pruning: The main methods of winter pruning are short cutting, dewatering, retraction and slow release. When pear branches are mostly upright, it is advisable to use inner buds or double buds to turn the main head to open the angle. The methods of cutting, thinning and retracting are the same as those of other fruit trees.
(1) Slow release: Also called throwing release or long release, even if the annual branches are not pruned, slow release can slow down the growth, increase the short and middle branches, which is powerful for nutrient accumulation, promote the thickening of branches, slow down the vigorous branches and turn them into flower buds. Young trees can bear fruit early and slow down oblique branches.
(2) Extrapolation of fruit buds or double buds: pruning the elongated branches in winter to make the cuttings grow upright, with the second or third buds in the elongation direction required by the shaping branches, and then the cuttings grow upright in the next year, forcing the branches with the second or third buds to open obliquely, cutting off the branches with the second or third buds in winter, and then taking the branches with the second or third buds as extended branches.
(3) Turn the main branch and change the head: by the method of retraction and pruning, the perennial back branch with an angle, that is, the branch under the main branch, will replace the main branch to extend outwards, or use the branch on the back, that is, the branch on the main branch, to narrow the angle to the left and right or change it to the required extension direction.
2. Pruning in summer: Pruning in summer should generally be light, because trees grow vigorously and are sensitive in growth period, and pruning has a greater inhibitory effect. The method comprises bud smearing, bud removing, core removing, twig cutting, ring cutting, branch pulling and branch hanging.