Sparse and layered shape, also called trunk sparse shape, is suitable for sparse trees with deep soil layer and fertile soil. The drying height is generally 50 ~ 70 cm. The whole tree has 5 ~ 6 main branches, divided into 2 ~ 3 layers. The three main branches of the first layer are adjacent or adjacent, with an interval of 20 ~ 40 cm, and are selected within 1 ~ 2 years; The base angle of the main branch is 60 ~ 70. There are 1 ~ 2 main branches on the second floor, which are inserted in the gaps of the main branches on the first floor. The third layer has 1 main branches. The interlayer spacing between the first main branch (the third main branch) and the second main branch (the fourth main branch) is 120 ~ 150 cm, and the second layer is 60 ~ 70 cm away from the third layer. Each of the three main branches at the base has 2-3 lateral branches, the first lateral branch is 60-70cm away from the base of the main branch, and the second lateral branch is 50cm away from the first lateral branch, which is planted opposite to the first lateral branch. The upper main branch can be matched with 1 side branch or not. The height of the tree is controlled at 4 ~ 5m, and the crown width is controlled at 5 ~ 6m.

The form of evacuation stratification starts from the fixed trunk and takes about 5-6 years to complete.

Dwarf stems are cultivated by fixing stems, that is, when seedlings are planted, or before germination after planting, they are cut at a position 80 ~ 100 cm above the ground, so that they can sprout new buds in the plastic band under the incision. This step can also be done in the nursery.

Cultivate central leading cadres and choose the main branches. After the stem was fixed, the buds at the cutting mouth germinated into upright branches in the next spring, and many branches sprouted under the cutting mouth. Choose the healthy and prosperous new shoots growing vertically as the central main stem. When pruning in winter, three branches with different directions and spacing of 20-40 cm (interlayer distance) are selected as three main branches, which are cut short from 80 cm and the main branches are drawn at an angle. Cut short the central trunk at the upper part of the branch 80 ~ 100 cm, and weaken the other branches to keep them strong and avoid overlapping.

In the second year, 1 ~ 3 robust branches were selected from the branches sprouting under the mouth buds of main branches at all levels for lateral branch culture. When the lateral branches grow to 50 cm, pick the core to promote the growth of secondary branches and cultivate them into secondary lateral branches. When the secondary lateral branches grow to 30 ~ 40 cm, the strong seedling heart is continuously taken to cultivate the tertiary lateral branches, and the remaining secondary lateral branches are lightly cut when they are full of buds to promote their early fruiting, which is used as a temporary fruiting branch group. Lateral branches at the same level should avoid crossing. At the same time, the spacing between the primary and secondary side branches is about 40 cm, and the spacing between the secondary and tertiary side branches is about 100 cm, and it should be noted that the direction of the side branches should always be consistent with the extension head of the main branch. Choose two new branches from the upper part of the central trunk as the second main branch. When cutting in winter, retract the main branches properly, adjust the number and extension direction of lateral branches at all levels to avoid overlapping, and retract those that extend too fast; Temporary fruiting branches are reserved, retracted or thinned according to whether there is room for expansion. Truncate the second layer of main branches to promote branches in the coming year.

In the third year, the new shoots that grow vertically are selected as the central main branches, and when they grow to 80 ~ 100 cm, short cutting will promote the growth of the third main branches; Truncate the second layer of main branches and cultivate 1 ~ 2 side branches; When the lateral branches are 30 ~ 40 cm long, the bearing branches are cultured by coring. When pruning in winter, the first and second layers of main branches are moderately retracted, and the fruiting branches on the first layer of main branches are alternately retracted and truncated. For other branches sprouting on the trunk, short branches with extension space are used as auxiliary branches, and all branches without extension space are thinned out.

From the 4th to 6th year, 1 branch was selected as the 3rd layer main branch on the trunk, and the 3rd layer main branch was shortened to promote the growth of lateral branches. Part of the lateral branches are cut short, part of them are kept, and they are alternately updated into fruiting branch group culture. At this point, the basic skeleton structure of evacuation stratification has basically formed. In the process of shaping and pruning in the future, we should deal with the subordinate relationship of various branches, maintain the growth advantage of backbone branches, pay attention to the selection and retention of auxiliary branches and other branches, make full use of space, increase the number of branches and expand the effective fruit area.