在森林的结构组成方面,由单一的树种形成的森林称做纯林,由两种以上的树种组成的森林称为混交林.因为混交林具有纯林所没有的许多优点,营造混交林日益受到普遍重视. In terms of the structural composition of forests, forests formed from a single tree species are called pure forests, and forests composed of two or more species are called mixed forests. Because mixed forests have many advantages that pure forests do not have, growing mixed forests Generally valued.