疏外养内,是减少树冠外围枝的数量,促进内膛枝条发育健壮的一种修剪措施。减少外围枝量,就是对外围长势偏旺、枝条数量过多的树,本着“疏大不疏小,疏多不疏少,疏老不疏嫩”的原则,适当疏除或缩剪树冠外围侧生的过密枝条。疏(缩)枝的程度和方法,要根据树 Sparse outside the support, is to reduce the number of branches around the crown, to promote the development of strong muscular borer pruning measures. Reduce the amount of peripheral branches, that is, the external growing prosperous, excessive number of branches of the tree, in the “sparse big sparse, sparsely sparsely, sparsely sparse not dilapidated” principle, appropriate dredging or shrunk the crown Peripheral side of the dense branches. Sparse (shrink) the extent and methods of branches, according to the tree