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(一) 长白山林区是我国木材生产重要基地之一。由于开发历史较久,原始森林资源日趋减少,采的多育的少,后备资源接续不上,“采育失调”局面,已成为迫切需要解决的重要问题。由于社会主义工农业建设需用木材日益增多,现有资源日趋减少,据初步推测到二十一世纪初,现有可利用的原始成过熟林将采伐殆尽,而解放后营造的人工林和天然幼
(A) Changbai Mountain Forest is one of the important bases for timber production in China. Due to the relatively long history of development, the original forest resources have been declining, the acquisitions have been less, the reserve resources have not continued, and the situation of “procreation and maladjustment” has become an urgent issue that needs urgent solution. Due to the increasing demand for timber for timber industry and agriculture, the available resources have been declining. According to preliminary estimates, by the early twenty-first century, the available mature forests will be depleted. After the liberation, the planted forests And natural young