For unfruitful trees, from April to August, the management of new shoots was emphasized, and the pruning was similar to that of the previous year, with the emphasis on cutting off upright branches and densely overlapping branches and twisting oblique new shoots.

For trees with fruit, after the second peak of fruit drop has passed, when the fruit grows to the size of soybeans, prune new branches. Sparse branches, dense branches and long branches are mainly used, so that the distance between the extension heads of new shoots is kept at 20 ~ 25 cm, and the fruitless branches are retracted or thinned, so as to improve the ventilation and light transmission conditions of the tree and make the fruit develop well.

(2) Pruning in winter

When planting in medium density, because the plants are not connected, the large or medium-sized branches planted on the trunk need to be extended continuously. Generally, the branches with extended heads should be cut first on the slightly dynamic fruit branches or medium-length fruit branches, and the cutting length is 15 ~ 25 cm.

For trees that have already crossed, large and medium-sized fruiting branches do not need to be extended. The key point is to retract, to ensure the internal structure of the tree, the branches are distributed reasonably, and the fruiting parts do not move outward, and the upright flourishing branches on the back and trunk of the fruiting branches are thinned, leaving two buds for developing branches and long branches; Retract the 2-year-old fruiting branches so that the fruiting parts do not move outward; The branch reserve is determined by the branch diameter. Generally, there are 8 ~ 10 fruit branches in the medium-sized branch group and 3 ~ 5 fruit branches in the small-sized branch group. Cut off the bud. Generally, long fruit branches leave 8 ~ 10 flower buds, and short fruit branches leave 4 ~ 6 flower buds. Leave 4 ~ 6 knots for long fruit branches and 2 ~ 4 knots for short fruit branches in the northern region. According to the tree potential, single branch regeneration is carried out according to the ratio of bearing branches to preparatory branches (that is, bearing branches leave two buds) = 1 ~ 2: 1; If the trees are medium or flourishing, cut them down at the rate of 2∶ 1; If the tree is weak, cut 1: 1. Thinning excessive branches, slender branches and upright branches, so that the distance between the extension heads of pruned branches is kept at 20-25 cm, and the branches do not cross. Cut off the central trunk from 1/3 to 1/2 of the current branch length.