1, natural round head shape
The trunk has 3-5 main branches scattered up and down. The main branches are divided into backbone branches and fruiting branches, and the crown of adult trees is round or semicircular. When this kind of tree grows up, the light in the crown is poor, the yield is low, the internal branches are small and the quality is poor.
2. The appearance of natural happiness
The trunk is divided into three main branches, which grow outward respectively. The main branches are divided into auxiliary branches, and the main branches and auxiliary branches grow into fruiting branches and grow alternately. The center of the crown is open, the appearance is round, and the indoor light is sufficient.
3. Trunk shape
There are more than 10 trunk branches directly on the trunk, which are not layered or staggered. They are conical in the early stage, cylindrical in the later stage, and finally inverted oval. As a result, the parts gradually move outward and rise, the illumination in the inner cavity is insufficient, and the output gradually decreases.
4, evacuation layered shape
There are 2-3 layers of main branches on the trunk, each layer has 2-3 main branches, and the main branches are divided into secondary main branches and lateral branches. The main branches of this tree are reduced and the spacing between layers is increased, which solves the problem that the parts move up due to insufficient illumination in the inner room.
Natural round head shape, simple shape, suitable for extensive cultivation and management, many Myrica rubra trees in production at present belong to this tree shape.
Born happy, without a central trunk, it is difficult to shape.
Trunk shape, convenient modeling, more fruit parts, higher yield, but after the full fruit stage, the internal light is insufficient, and the yield decreases.
Vacuuming and layering can basically solve the problem of internal lighting, but the tree-like requirements are high, the operation is troublesome, and improper modeling is easy to cause the phenomenon of strong top and weak bottom.
Therefore, the suitable tree shape should be selected according to the soil, climate, variety characteristics and management level of Myrica rubra.