摘要
以烟台市 30 块样地为研究对象,采用层次分析法,以样地森林质量为目标层,以林分稳定性、林分生产力、森林生态效能为评价准则层,以单位面积乔木株数、森林健康程度、郁闭度、树种结构、平均胸径、平均树高、土层厚度、单位面积蓄积量、生物多样性保育价值量、植被碳密度等为评价指标构建指标评价体系,综合评价森林质量.结果表明:林分生产力是评价森林质量的主导因素;平均胸径、平均树高、树种结构综合权重最大,占总权重的 0.6181,是评价森林质量的重要因子.从总体上看,样地森林质量集中分布在"一般"和"较差"等级,分别占总样地的 36.67%和26.66%,通过精准提升森林质量,进一步优化林分结构,调整树种组成,全面提高森林质量.
Abstract
Using 30 sample plots in Yantai City as the research object,the Analytic Hierarchy Process(AHP)was employed to comprehensively evaluate the forest quality,including setting forest quality as the target layer,using forest stability,forest productivity,and forest ecological efficiency as evaluation criteria,and constructing an indicator evaluation system based on 10 evaluation indicators(unit area tree density,forest health level,canopy density,tree species structure,average diameter at breast height(DBH),average tree height,soil layer thickness,unit area volume,biodiversity conservation value,and vegetation carbon density).The results indi-cated that forest productivity was the dominant factor in evaluating forest quality,and the average DBH,average tree height,and tree species structure were important evaluation factors bearing the highest comprehensive weight,accounting for 0.6181 of the total.Overall,the forest quality of the sample plots was concentrated in the"average"and"poor"levels,accounting for 36.67% and 26.66% of all,respectively.The comprehensive im-provement of forest quality can be achieved through precise improvement of forest quality,further optimization of stand structure,and adjustment of tree species composition.
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