大兴安岭不同类型低质林改造效果的综合评价

Effect of Different Types of Low-quality Forest Transformation in Daxing'an Mountains on Comprehensive Evaluation

在大兴安岭林区选取针阔混交林、蒙古栎林(Xylosma racemosuz)、白桦林(Betula platyphylla)、山杨林(Populus davidiana Dode)、阔叶混交林5种不同类型低质林作为改造试验区,建立涵盖枯落物持水性能、植被生物多样性、土壤物理化学性质、土壤碳通量、更新苗木生长状况等38项指标的综合评价指标体系,运用主成分分析法对不同类型低质林的改造效果进行综合评价。结果表明:不同类型低质林的改造效果,综合得分从大到小依次为针阔混交林、蒙古栎林、阔叶混交林、白桦林、山杨林,不同类型低质林改造后,针阔混交低质林的改造效果最好。

We selected coniferous and broad-leaved mixed forest, Quercus mongolica forest （Xylosma racemosuz）, Betula platyphylla forest （Betula platyphylla）, Populus dividiana forest （Populus davidiana Dode） and broadleaved mixed forest of the five different types of low quality forest in Daxing＇ an Mountains, to study the litter material properties, biological diversity, soil physical properties, soil chemical properties, soil carbon flux and updated seedling growth of 38 indicators, and used apply principal component analysis to evaluate different types of low quality forest transformation effect. The de- scending order of the transformation effect of different types of low quality forest were coniferous and broad-leaved mixed forest （0.808）, Quercus mongolica forest （0.141）, broadleaved mixed forest （ -0.058）, Betula platyphylla forest （ -0.292）, and Populus dividiana forest （- 0. 598 ）. After the transformation of different types of low quality forest in Daxing＇ an Mountains, the effect of transformation of coniferous and broad-leaved mixed forest was the best.