果树经整形修剪能造就强健的骨架和良好的树体结构,是果树高产长寿,稳产优质的重要条件。一般果树枝条的生长,受顶端优势、垂直优势、枝粗优势等规律的支配。在果树生产上,为促进幼树迅速扩大树冠,在开始的几年对主、侧枝进行修剪时,往往选择生长最强的一个新技(位于整个大枝最顶端处)作为主、侧枝的延伸枝。这种修剪方法,使延伸枝的生长方向与基技保持直线,故称为“直线延伸”。它能使幼树以最快的速度向外延伸 The pruning of fruit trees can create a strong skeleton and a good tree structure. It is an important condition for fruit trees to have high yield, longevity and high quality. The growth of the general fruit tree branches, by the top edge, the vertical edge, the advantages of branches and other rules of domination. In the production of fruit trees, in order to promote the rapid expansion of saplings, in the first few years, when pruning the main branch and the lateral branch, one of the strongest growth techniques (at the top of the whole branch) is often selected as the main branch of the branch . This pruning method, so that the extension of the extension of the growth direction and the base technology to maintain a straight line, it is called “straight line extension.” It allows saplings to extend outward as quickly as possible