由于果农对密植苹果树的整形修剪方法了解较少,仍按传统的大冠稀植树进行整形修剪,培养比较大的主枝,造成了空间较小,树冠郁闭,通风透光条件恶化,致使树体内部光秃,下部枝组衰弱,甚至死亡,密植树的优点不能显示出来。为此,对密植苹果园要进行改造。改造的主要原则是:减树高,控枝展。一般2—3年进行,具体方法如下:第一年。(1)冬剪时强行落头。将中心干落至 As the fruit growers know little about the plastic pruning methods of the densely-populated apple trees, they are still trimmed and pruned according to the traditional large-crown and thin-planting trees, resulting in smaller space, canopy crowns, deteriorated ventilation and light conditions, resulting in The inside of the tree is bare and the branches of the lower branches are weak and even dead. The advantages of dense tree planting can not be shown. To this end, close planting apple orchard to be transformed. The main principles of transformation are: reduce the height of tree branches. Generally 2-3 years, the specific method is as follows: The first year. (1) forced to drop the winter shear. The center down to