由于长期过量采伐，东北国有林区的林木资源锐减，为了尽快恢复森林资源，维系森林生态系统的平衡，从８０年代起，国有林业企业相继进行了产业结构调整，开发利用林区的土地资源、生物资源、水草资源等，发展以种植、养殖、采集、加工为主的林业多种经营，收到了较好的经... Due to the long-term over-harvesting, the forest resources in the northeast state-owned forest areas have been sharply reduced. In order to restore forest resources as soon as possible and maintain the balance of forest ecosystems, starting from the 1980s, the state-owned forestry enterprises successively carried out industrial restructuring and development and utilization of forest land resources , Biological resources, aquatic resources, the development of planting, breeding, collecting, processing based forestry diversified operations, received better ...