果树单株产量决定于花量、座果数和果实重量,这些因素是以一定的枝条数量为基础的。教条的顶端优势是指生长着的新梢梢尖或枝条顶芽对侧芽萌发的抑制。枝条的顶端优势对发枝数量、质量、枝类组成、树冠形态、树势均衡等各方面都有重要影响。枝条的顶端优势强,表现为延伸生长的新梢不易发生副梢,一年生枝只先端长出少数生长旺盛的枝条,下部光秃,或仅形成少量短枝。主枝自然成层状排列,树冠表现 Fruit tree yield per plant depends on the flowering, fruit and fruit number, these factors are based on the number of branches. The top edge of dogma refers to the growth of shoot tips or branches of buds on the lateral bud germination inhibition. The superiority of the branches has an important influence on the number of branches, the quality, the composition of branches, the shape of canopy and the equilibrium of trees and so on. Branches of the top edge of the strong performance of the extension of the shoot is not easy to shoot the secondary shoots, annual branches grow only a small number of exuberant branches, the lower part of the bare, or only a small amount of short branches. Main branches naturally layered arrangement, crown performance