After young trees are planted, they usually begin to bear fruit in 4 ~ 5 years, and the early yield growth rate is small. Although young trees are mainly short fruit branches, the number of medium-long fruit branches is also quite large; Mature trees mainly bear short fruit branches, but there are still many medium-long fruit branches.
The ability of fruit-setting table to produce branches is weak, generally only 1 branch is produced, and it is not easy to form short fruit-setting branches with many branches; The life span of short fruit branches is medium and long, and the fruiting parts move out quickly. The continuous fruiting ability of fruit branches is weak, and the fruit setting rate is low if the perennial short fruit branches or short fruit branches are not rejuvenated in time. The new fruit branches bear better fruit, and the tender branch group is sensitive to pruning and easy to renew and rejuvenate.
When shaping young trees, it is better to have sparse trunk shape, and pay attention to the opening of the main branch angle when pruning to prevent the middle branch from being too strong. The specific method is to keep the extension branches of the main branch lightly and leave more branches on the main branch. The branches on the main branch should be as sparse or not as sparse as possible to increase the growth of the main branch and prevent the middle branch from being too strong. For large trees with medium trunk and high strength, the method of medium trunk and falling head can be used to change the sparse trunk shape into a delayed open heart shape.
The lateral branches on the main branches of Dangshan crisp pear young trees are often difficult to distinguish from the auxiliary branches or big branches, mainly the middle branches are easy to gain weight. Therefore, this situation should not be dealt with urgently, but when the age of the tree is about 10 years, the lateral branches should be gradually distinguished from the branches by shrinking some auxiliary branches or other restraining measures.
The shoot group of Dangshan crisp pear is composed of short fruit branches, which are generally few and most of them do not need thinning. For large and medium-sized branches that extend too long year after year, attention should be paid to shrinking and pruning to promote the vigorous growth of the back branches and stabilize the fruiting parts. For leafy trees, you can throw more medium and long branches and take them back after the flower buds form and bear fruit, so as to give full play to the bearing capacity of new branches. The middle branch of Dangshan crisp pear or the longer fruit-bearing branch drawn from the fruit-bearing table can be pruned by putting it first and then shrinking it.