① Pruning in the young tree period. In this period, flower buds are mainly removed, with the purpose of expanding the crown, increasing the number of branches and promoting the development of roots. In the spring of the second and third years after planting, the weak branches become thinner, and in the third and fourth years, the crown is still mainly enlarged, but it can bear medium fruit. Generally, the plant yield should be controlled below 1 kg in the third year, with strong branches as the main fruit.

② Pruning of adult trees. At this time, pruning is mainly to control the height of the tree and improve the lighting conditions, mainly to thin branches, and to thin out branches that are too dense, too thin, branches that are damaged by diseases and insect pests and roots. The root activity is stronger than that of open varieties when thinning branches; Vertical varieties go to the center to dry, open the skylight and leave the middle branches. The best fruiting age of boughs is 5? I'm 6 years old, so I need to take it back and update it in time. Weak branches erase flower buds and make them stronger. Adult trees have a lot of flowers, so some buds need to be cut off. Generally, each strong branch has 2? Three flower buds.

③ Regeneration of ancient trees. After planting for about 25 years, the aboveground part of the tree has become old, and the whole tree needs to be updated, that is, all the aboveground parts are sawed off close to the ground and new branches sprout from the base.

2. Pruning of shrub blueberries:

1 cut the fire. That is, during the dormancy period, all the aboveground parts are burned, and new branches germinate again, forming flower buds in the same year and flowering and fruiting in the next year. After that, it will be cut by fire every two years, and it has always maintained vigorous branches.

(2) stubble pruning. Before germination in early spring, the aboveground part should be leveled and sawed off from the base of the plant, and the sawed branches should be left in the orchard, which can play a role in covering soil and improving organic matter.

For reference only * * * to discuss with you.