小兴安岭森林资源可持续经营的研究——以鹤北林业局为例

Study on Sustainable Management of Forestry Resources-A Case Study in Hebei Forestry Bureau

本文以鹤北林业局幼龄林、中龄林、近熟林、成熟林和过熟林5个龄组为研究对象,选取有林地单位面积蓄积、单位面积林分总生长量、针阔面积比、森林覆盖率、抚育面积率和可采用材林比6项指标,利用灰色系统理论对各龄组森林资源可持续性进行综合评价。针阔面积比在评价体系中权重较大,树高、胸径、郁闭度之间,两两间呈正相关,生长率与树高、胸径间呈负相关。随着林龄的增长林分的树高、胸径、郁闭度等随之增长,而森林资源可持续性下降,至过熟林后开始上升,林龄处于幼龄林及以红松、椴树、柞树为优势树种的林分森林资源可持续性最佳。

The young stand,middle-aged stand,near mature stand,mature stand and over mature stand in Hebei Forestry Bureau were studied and the following six indices including forest volume,total stand growth per unit area,the ratio of coniferous to broad leave,forest coverage rate,tending area rate and the available timber rate were used to comprehensively evaluate the sustainability of forest resources in each age stand by grey system theory. The weight of coniferous to broad leave ratio was the largest in the evaluation system. The tree height,DBH,and canopy density are positively correlated with each other. The growth rate was negatively correlated with tree height and DBH. Along with the increase of stand age,the height,DBH,and canopy density increased,but the sustainability of forest resources decreased and didn＇t start to rise until over mature stand. The forest resources sustainability of young stand with dominant tree species such as Pinus koraiensis,Tilia tuan,and Quercus palustris was excellent.