Fruit trees are perennial woody plants, and their life and year have many different and complicated changes. In particular, the vegetative organs such as branches, leaves and roots are often in the dynamic process of constant renewal and aging, balance and imbalance, coordination and imbalance, and the contradiction between the internal physiology and the external environment of trees continues to occur and transform. If you don't make timely and necessary pruning adjustments, the following problems will inevitably appear in the long run.

(1) The tree vigor is different, and the height is uneven: if the fruit trees are left to grow naturally without proper pruning at an early age, even if the size and thickness of the seedlings are the same at first, their growth speed and strength will be very different. Especially the small trees weakened by unexpected factors, if they are not properly cared for and supported, the strong trees will seize the favorable space and make them unable to grow and develop normally. Finally, the strength of the trees is different, and the height of the trees is uneven.

(2) The branches are chaotic and the subordination is unknown: a reasonable tree structure should have branches, big and small, long and short, orderly distribution and clear subordination. Trees that are not pruned for a long time often have mixed branches and long branches, and there is no way to lose the relationship between the leader and the led.

3) Dense foliage and many pests and diseases: Most fruit trees that grow naturally without pruning are dense and crowded, and pesticides are difficult to control, which often become the most favorable habitat for pests and diseases.

4) The crown of the tree is closed, and the light is insufficient: in the natural development state, the branches of fruit trees often cannot stand upright, forming a "head-holding" growth. The periphery is closed, the inner cavity is short of light, the tree body accumulates less nutrition, and the branches are difficult to blossom and bear fruit. It seriously affects the flower bud differentiation and fruiting of branches.

) The inner room is empty, and the result moves out: the lack of light caused by long-term stagnation will inevitably make the branches and leaves in the inner room lose their ability to synthesize nutrients and have to live by parasites. In the long run, it will "starve to death", which will eventually lead to the bare inner cavity of the crown, and the result will move to the periphery.

Difference of fruit state between pruning and non-pruning fruit trees

(6) Partial imbalance, overall imbalance: naturally growing trees and branches show more competition than coordination and cooperation. In the long run, the overall growth and development of the crown will be unbalanced.

(7) Delayed fruiting, low yield and poor quality: trees that are completely allowed to grow naturally will inevitably lead to delayed fruiting of young trees due to the intensification of the above contradictions. Even if it bears fruit, it is prone to "big and small years" and the output is unstable. The size, color and taste of fruit will be seriously affected.