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For facility fruit trees, root growth is controlled through root pruning, which in turn modulates the growth and development of the shoot, which is more direct and effective than direct action on the ground. Root pruning can produce a series of benign reactions to the tree body: the vegetative growth of the tree is weakened, the tree is dwarfed, the proportion of short branches is increased, and flower buds are more differentiated. Nitrogen levels in the tree declined, carbon levels increased, and the ratio of carbon to nitrogen increased, favoring flowering. In the cultivation of fruit trees, the root trimming technique can be used more to facilitate the control of flowering and safer summer. The time of root pruning is appropriate for flowering and new shoots and long-term. Wang tree can be pruned twice. The moderate tree can be pruned once. The weak tree is not pruned. The effect of root pruning usually lasts for 30 to 45 days and then restores root construction. There are two main types of methods for root pruning. The physical pruning method uses artificial or mechanical physical means to cut the root (especially the vertical root, the thick root) to achieve the purpose of pruning. The manual method can be used to cut out the root system and cut the root with scissors or other tools. The root system can also be cut off within a certain range by a special mechanical device. The chemical pruning method utilizes some chemicals to kill or inhibit the growth of roots for pruning purposes. The commonly used chemical drugs are mainly copper ion preparations such as copper carbonate, copper sulfate, copper naphthenate, and the like. These chemicals can be used to inhibit lateral roots and can also be used to remove straight roots. Regardless of the type of root pruning method, in the specific application, comprehensive consideration should be given based on factors such as tree age, growth and development status, and production purpose. Flexible control should be used. Do not use excessive amounts, resulting in large injuries and many side effects. Effect.