昭乌达盟现有森林,绝大部分为天然次生林。树种主要为桦树、山杨,其次是柞、椴、柳、云杉等;在山脊上也有零星的生长着落叶松。桦、扬、柞、柳多为萌芽更新。桦、杨的林龄在Ⅲ——Ⅴ龄级,干形弯曲、尖削度大,并因长期的萌芽分蘖,树木多罹心腐,林形不好,多成簇状,分布不集中,零散小片占多数。疏密度多在0.3——0.5左右,0.8以上者很少。 Zhaowuda League existing forest, the vast majority of natural secondary forest. Trees are mainly birch, aspen, followed by oak, linden, willow, spruce, etc .; also sporadic growth in the ridge larch. Birch, Yang, oak, willow for the budding update. Betula platyphylla and Betula platyphylla stand in Ⅲ - Ⅴ age class, dry bending, sharp taper, and due to long - term sprouting and tillering, more trees suffering from heart rot, forest shape is not good, more clusters, the distribution is not concentrated, Scattered pieces accounted for the majority. Density of more than 0.3--0.5, 0.8 or more rarely.