Having an upright or curved central trunk. 15 ~ 20 large and medium-sized fruiting branches are planted directly on the central trunk in a wheel shape, without layers and main branches. After molding, the crown is about 2.5 meters high and the crown diameter 1.5 ~ 2.0 meters, which is cylindrical. This tree pruning technique is simple and easy to master, and it is suitable for high-density orchards with 1.5 ~ 2m× 2.5 ~ 3m.

(2) Plastic method

After planting, the stem can be fixed at 80 ~ 120 cm according to the strength of the seedlings. At the same time, the buds below 40 cm are erased. Within the height range of 40 ~ 120 cm, the fully developed buds distributed in a wheel shape on the central trunk are selected every 10 cm, and the rest buds are erased. In the germination stage, all the selected buds are smeared.

Select the newly grown branches as the main branches, and flatten the other side branches as the bearing branch group. Each side branch is extended about 30 cm, leaving about 10 cm for heavy coring, and the central trunk is moderately coring every 50 cm. When cutting in winter, each branch group should be cut short appropriately, and the central trunk should be cut short. In the germination stage, leafy branches or extremely short branches on the trunk are carved out. Summer is the same as the first year. From early May to early June, the top branches and non-backbone branches can be treated with torsion center to promote the formation of flower buds. When the height of 1 annual tree is more than 1.5 m, the trees with more lateral branches can use chemical control to promote flowering and control the crown in the spring and summer of next year, so that the growth of new shoots can be maintained at about 20 cm. It will take two years to form.

Within 2 ~ 3 years after planting, the crown of the tree is controlled by chemical control technology in the growing season, so that the tree can grow while bearing fruit. Fine pruning of fruiting branches in winter after fruiting.

In the process of shaping cylindrical trees, we should pay attention to the following aspects: for varieties with weak dryness, in order to maintain the growth advantage of the central stem, we should control the growth of competitive branches and twist the tips if necessary. For varieties with strong dryness, branches with medium or weak growth potential can be changed to make the middle trunk bend and extend. ? To prevent the branches from getting bigger, it is necessary to control the branches that are too big and too prosperous as soon as possible. ? Large branches should be leveled, the upright branches drawn from the back of the middle and rear parts should be strictly controlled, and the growth should be controlled by re-coring or twisting the tips. ? After molding, it is necessary to prevent the crown from being strong and weak, and the central trunk cannot be controlled by short joints. We should use slow release without cutting to weaken the growth, and then we will be happy when the growth is weakened after the top of the central stem bears fruit.

Slender spindle-shaped and cylindrical tree-shaped, when bud seedlings are used for shaping, when the new shoots grow to about 75 cm high, the top shoots are removed and fixed by 20 cm, and then shaped as above. Formed a year later. In order to prevent the distortion of the central trunk, a hedge frame can be set up at a young age to assist in plastic surgery.