Pruning principle: For the whole hedge, the lower branches and leaves should receive as much sunlight as possible to avoid withering due to excessive shading. Therefore, the lower part of the crown should be wider and narrower, and it is usually better to use a regular trapezoid or steamed bread shape. For natural hedgerows, appropriate measures should be taken to adjust tree vigor and rejuvenation according to the habits of different tree species and local climate. Used for slow-growing hedges, flower hedges and fruit hedges (such as azaleas and pyracantha, etc.). ), most of them are untrimmed hedges or only local branches are adjusted.
There are several forms of pruning according to different shapes: one is single-layer pruning with the same height; The second type is double-layer, which consists of two layers of materials with different heights; Third, there are more than two layers of multi-layer style, and the space effect is rich. From the perspective of prevention and shielding effect, two-layer and multi-layer are better.