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我局用材林总蓄积和建局初相比,减少了48％。建局初落叶松占80％.白桦占15％,其余5％为柞,杨林,而现在落叶松仅占50％多些,白桦占40％.柞、杨近10％。由于长期过量采伐,除高山陡坡尚有些成过熟林,交通方便,采伐条件较好的地方现有森林林相残破,林木质量下降。我局是国家重要林业基地,必须坚持以营林为基础,加速培育森林资源.实行主伐和抚育伐并举。抓好中幼林抚育和次生林改造,大搞木材综合
Our bureau reduced the total reserve of timber forests by 48% from the beginning of the establishment. Larch accounted for 80% of the original building. White birch accounted for 15% of the remaining 5% oak, Yang Lin, and now the larch only accounts for more than 50%, birch accounted for 40% oak, Yang nearly 10%. Due to the long-term over-harvesting, except for the steep slopes of the mountain, there are still some over-ripening forests, which are easily accessible and where the logging conditions are good. The existing forest stands are broken and the quality of the forest trees is deteriorated. Our bureau is an important national forestry base and must adhere to the basis of silviculture and speed up the cultivation of forest resources. Do a good job of secondary forest tending and secondary forest transformation, engage in comprehensive timber