北京市八达岭林场森林生态系统健康性评价

以野外实地调查为基础．在可操作性、科学性、可比性、可接受性原则指导下，采用复合结构功能指标法对八达岭林场各小班林分物种多样性、群落层次结构、郁闭度、灌木层盏度、年龄结构、林分蓄积量、土壤侵蚀程度、病虫害危害程度进行健康评价并划分4个等级，在林分尺度上森林的理想结构可简单表述为复层、异龄、混交林结构，具有比较发达的灌木层和草本层，并且具有较高的生物多样性和生物生产力。这样的结构具有较高的稳定性、抗干扰性和活力。是健康森林群落的理想结构，以此为八达岭林场森林健康经营提供科学的理论依据。

Health Assessment of Forest Ecosystem in Badaling Forest Center

Based on field investigation, guided by the principle of maneuverability, sciences, comparability, acceptability, this paper took health assessment of Badaling forest center about plant species diversity, construction of forest community, canopy density, cover of shrub community, age structure, stand, soil erosion, plant diseases and insects pests and measured for ordination by adopting the complex structure and function indicator method, which set off 4 ordination for forest ecosystem. Health forests of small scale are the structure of more layer and age, mixed forest, better layer of shrub and grass, better biodiversity and productivity, which are better stability, anti-interfere and vigor . This is a kind of better structure of forest health community which offers the scientific theory of forest health management for Badaling forest center.