Pruning on the fruit tree has the effect of promoting the growth of shoots, multi-branching, and long-branched branches; while the pruning of fruit trees as a whole has the effect of reducing the amount of foliage and reducing the growth. This promotion and inhibition of the performance of the tree at the same time, called the dual role of pruning.
The short branches can reduce the number of shoots and buds, relatively improve the nutritional status of the shoot buds, so that the remaining buds can sprout and prosper, and enhance the local growth potential; but it is due to the reduction of the number of shoots and buds that make them short. The total growth of the truncated shoots is also relatively reduced, which is often reflected in the differences in treatment of the same branches. For example, the annual branch selected as the backbone branch is short in the middle full shoots, and the shears give off a robust new shoot, which shows the promotion of pruning; but the total leaf amount decreases due to a short cut, resulting in slow growth of the thickening, Its thickness is significantly smaller than that of the non-short truncated auxiliaries, showing the inhibitory effect of pruning.
Thinning of the branches at the lower part of the branches can promote the growth of the branches, while the branches at the upper part of the branches can have the effect of weakening the growth potential. This also shows the dual effect of pruning. When using the back branches, it can not only increase the growth potential of the pruning branches, but also increase the vertical angle of the pruning branches, weakening their total growth, and also show the dual role of pruning.
The dual roles of pruning are extensive, some are expected and some are hoped to be avoided. To be familiar with the different pruning methods, pruning, trimming sites, and the overall, local effects on fruit trees, can only receive good results.