乔木是具有明显直立的主干而上部有分枝的树木。而亚乔木便是乔木树种中的那些小乔木，它们通常比较矮小，在林分中处于次林层地位。传统的林木概念一般都指乔木树种，开发利用的重点都偏移在乔木树种中，而亚乔木却被冷落无人问津。因此，亚乔木资源一直未被人们重视。近年来? Trees are trees with apparently erect trunks and branches above. The tree is the arbor tree arbor in the small trees, they are usually relatively small, in the forest in the sub-forest status. The traditional forest concept generally refers to arbor species, the development and utilization of the focus are offset in the arbor tree species, and Ya Qiao Mu was left out nobody cares. Therefore, Yaqiao wood resources have not been valued. In recent years?