长白山重点国有林区森林资源动态分析--以临江林业局为例

以临江林业局为例,分析了1977—2008年长白山重点国有林区森林资源动态变化情况,并提出今后森林资源经营管理的建议.结果表明:临江林业局林业用地面积和有林地面积均呈先下降后上升趋势,林地利用效率逐渐提高.1977—1997年,天然林面积逐年大幅减少,减少率约为37%,而后逐年上升;阔叶林蓄积所占比例大幅减少,针叶林蓄积比例大幅增加,针阔混交林蓄积占比趋向合理;1987年,中龄林面积和蓄积比例均很大;2008年林分各龄组面积和蓄积占比趋向合理.

Dynamics Analysis of the State-owned Forest Resource in Changbai Mountain---Taking Linjiang Forestry Bureau as an Example

The dynamic changes of forest resources in Changbai Mountain were analyzed during 1977—2008 , taking Linjiang Forestry Bureau as an example. The results show :Forestry land area and forest area declined before rising trend,the utilization efficiency of forestry land increased gradually. Natural forest area was greatly reduced year by year during 1977—1997 and reduction rate was 37%,then decreased year by year. Broad-leaved accumulation of sharply reduced, coniferous forest accumulation greatly increased, and accumulation of mixed needle tends to be reasonable. Mid-maturation forest area and volume proportion are very big in 1987,and the forest area and volume of each age group tend to be reasonable in 2008 .