The main tree structures of apricot and plum are natural happiness, small crown layered shape, evacuated two-layer happiness and free spindle shape. When pruning, we should choose different tree structures according to the growth and development characteristics of different varieties and site conditions, and we should master the principle of shaping according to trees when pruning. For example, Di Wei, Dinosaur Egg, Flavor Queen, etc. should be planted in the soil with good site conditions, and the trees with natural gaps and evacuation on the second floor should be adopted. In the soil with poor site conditions, the trees with small crowns and evacuation on the second floor should be adopted. Other varieties mainly use small crown layered, evacuated two-story open-heart trees and free spindle-shaped trees.

(1) Master the principle of combining density with confidentiality. Apricot varieties such as David, Dinosaur Egg and Flavor Queen have strong apical advantages, and 2-3 strong branches can germinate at the shoot tips, resulting in dense branches and affecting the light in the crown. Therefore, the upper and peripheral branches of the crown are more sparse and not short; For the more vigorous annual vegetative branches in the crown, those that can be cultivated into fruiting branches should be kept, and those that cannot be cultivated into fruiting branches should be eliminated in time.

② The original fixed backbone branches are not moving. For some temporary fruiting branches that grow too densely (especially there are too many big branches in the middle and upper part of the crown), if the internal ventilation and light transmission are poor, a part should be properly thinned to improve the lighting conditions.

③ For oblique or transverse L ~ 2-year-old branches, if the top growth is weak, they can be placed for a long time without pruning; On the contrary, if the top growth potential is strong, it can be shortened to about 1/3 of the whole branch, which is beneficial to the bud germination at the base of the branch.

(4) For the bouquetlike and short fruiting branches that have been bearing fruit for 3-5 years continuously, when they gradually droop and age, they should be drained from the base, and a large number of new branches around them should be used as fruiting branches to maintain strong fruiting ability.

⑤ For the perennial fruiting branch group, if its fruiting ability decreases gradually, it should be retracted to strong buds to make its fruiting part compact and restore its growth potential.

⑥ Fruiting branches are generally not pruned. If there are too many bouquets and short branches growing on a fruiting base branch, you can keep the upper branches and remove the lower ones.

⑦ Don't cut short the weak branches, recover the drooping branches in time and raise the angle to help rejuvenate; For parallel branches, leave one long and one short, or one strong and one weak, or leave one to go: for overlapping branches, stretch and shrink, or press and lift, which is beneficial to the rejuvenation of branches and the growth of new branches.