论文部分内容阅读
1998年天保工程实施后,长白山林区森林资源进入了恢复性增长阶段。根据第八次全国森林资源清查结果,2009年长白山区18个国有森林工业局活立木蓄积达到4.9亿立方米,比开发初期(1962年)的3.9亿立方米净增1亿立方米。目前长白山林区森林资源存在的主要问题是林分生长缓慢,林地生产力水平低下,林木蓄积生长量仅为每年每公顷1.4—2.9立方米,比经营水平较高的相同立地条件林分平均低50-70%。当务之急就是要重视
After the implementation of the Natural Forest Protection Project in 1998, the forest resources in Changbai Mountain forest area have entered a recovery growth stage. According to the results of the Eighth National Forest Inventory, live wood in 18 state-owned Forest Industry Bureaus in Changbai Mountain in 2009 reached 490 million cubic meters, a net increase of 100 million cubic meters from 390 million cubic meters in the early stage of development (1962). At present, the main problems existing in the forest resources of Changbai Mountain are that the stand growth is slow and the productivity of forest land is low. The growth volume of forest stands is only 1.4-2.9 cubic meters per hectare per year, which is lower than the average site of the same site with higher management level -70%. The top priority is to pay attention