Cultivation of natural cup-shaped crown: after transplanting the annual grafted seedlings, leave the dry height 1 m, cut off the top, cut off the mouth buds and leave strong buds. Keep pulling out new branches below 1 m, and you can choose to be the main branch. Generally, new branches 30-40 cm above the ground are left as the first main branches; 20-30cm above the first main branch, selecting a new branch as the second main branch; At 1 m, that is, the new branch extracted from the cutting bud is the third main branch. The three main branches should be evenly distributed around the trunk, and it is best not to rotate. When pruning in summer, the upright branches, sprouting branches and sprouting rootstocks on the main branches should be removed to avoid affecting the growth and early formation of the main branches. When cutting in the winter of the following year, the main branch is cut short, and the tender buds are cut off to keep the strong buds, so as to cultivate the extension branches of the main branch. In addition, select and leave suitable side branches on each main branch. It should be noted that the side branches at the same level stay in the same direction, so as not to cross each other and affect the tree shape and ventilation.

Cultivation of natural happy crown: after transplanting the annual grafted seedlings, the stems should be fixed at 40- 60 cm. Generally, three main branches (a few of them have four or five main branches) are selected in the plastic belt above the fixed height of the trunk, and the main branches should be evenly distributed, keeping about 45 degrees from the central trunk and growing radially. Remove all remaining branches. When cutting in the next winter, cut the main branch by 30-50 cm to prepare for the promotion of side branches. Other branches, branches sprouting on the trunk and buds on the rootstock should also be removed. This forms a natural and happy crown shape. There are many kinds, and the harm is common. Adult aphids and nymphs suck the sap of leaves, and after the young leaves are killed, they roll horizontally to the opposite side, contract irregularly, and finally dry up and fall off. After the adult leaves are killed, the leaves generally curl and droop, and in severe cases, the surfaces of the leaves are dirty, dry and fall off. The control method is generally 800~ 1000 times of 20% avermectin triazophos EC; Or 800- 1000 times of imidacloprid; Or 4.5% beta-cypermethrin EC 1000 ~ 1500 times.