Natural round head shape is also called natural semicircle. It is mostly used to transform dry fruit trees in mountainous areas, but it is rarely used in flat and high-yield orchards. The method of shaping is to let the seedlings develop naturally after cutting at a certain height. Only the redundant branches are thinned out every year, and the non-overlapping and non-coexisting main branches, side branches and fruiting branches are arranged reasonably, and the remaining branches inserted in the air are leveled as much as possible to make them blossom and bear fruit. After 7-8 years of cultivation, 6-7 main branches are retained, naturally forming a round head shape. Crown height and crown diameter depend on the specific situation.

This model has the advantages of light pruning, simple crown shaping process, fast forming and early effect. However, the internal ventilation and light transmission are often poor in the middle and late stage, which affects the three-dimensional effect and fruit quality. At this time, we should pay attention to thinning the main branches and branches with weak density and shelter from the wind and light.

In a word, the big crown shape is a tree structure adopted under the condition of sparse planting. Generally, the height of the tree is more than 4 meters, the crown width is more than 5 meters, and the spacing between plants is more than 5 meters ×6 meters.