(1) Only 1 trunk is left on each single tree. After planting pomegranate seedlings that year, select 1 upright strong branches to cut off at 70 cm, and all the other tillers are cut off. Three or four new branches sprouted in the plastic belt 30-40cm below the cutting opening in winter of that year were kept according to the orientation, in which the first branch under the cutting opening was selected as the central trunk, and the other two or three branches were used as the main branches, forming an included angle of 45-50 degrees with the central trunk, and all the other branches were thinned out. The drying height is about 33 cm. Cut off the branches selected as the central trunk again at the upper part of 50 ~ 60 cm. In the second winter cuttage, the first branch under the second cuttage is selected as the central trunk, and the next two or three branches are selected as the second layer main branches. In the process of shaping and pruning in the third and fourth years, in addition to maintaining the growth potential of the central trunk and main lateral branches at all levels, it is necessary to sparse many branches and leave the mother branches with moderate results; The sprouting tillers in rhizosphere should be thinned by combining summer bud grafting and winter pruning. Through the above process, the tree is basically completed (figure 16).

Figure 16 Sketch of Young Tree Modeling of Single Trunk Tree

(2) Choose two trunks for each double trunk tree. After planting pomegranate seedlings, select two robust branches, cut 70 cm, and drain all the other branches. In the second, third and fourth years, the pruning method is the same as that of single trunk. According to azimuth180, 4 ~ 5 main branches are left in 2 layers on each trunk. A middle twig should be left between the two trunks, and the height of the trunk formed is about 33 cm, the included angle between the trunk and the ground is about 50, and the included angle between the main branch and the central trunk is about 45 (Figure 17).

(3) Choose three trunks for each tree. After the pomegranate seedlings were planted, three robust branches were selected and cut off at 70 cm. The subsequent shaping and pruning methods were the same as those of single stem. According to the orientation, 4-5 main branches with two layers are selected on each trunk, and many middle branchlets are reserved in the holes between the three trunks. The formed trunk is 33 cm high, the included angle between the trunk and the ground is about 50, and the included angle between the main branch and the central trunk is 45 ~ 50 (Figure 18).

Figure 17 Schematic diagram of double trunk tree shaping

Figure 18 Schematic diagram of three trunk trees shaping

(4) Most pomegranate trees are cuttage propagation, with 3-4 branches per seedling. After surviving, let it grow naturally, and a large number of sprouting branches often appear in the rhizosphere, which can reach more than 20. In the growth process of 1 ~ 5 years, let it grow in the first year, prune it in winter or spring of the next year, select 5 ~ 6 strong tillers as the trunk, and remove all the rest. After pruning in winter, the regenerated tillers and overgrown branches can be thinned to form a semi-circular crown with multiple stems (Figure 19).

Fig. 19 schematic diagram of cluster young tree modeling