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以甘肃省江河两岸区、国家级国家级自然保护区、黄土高原丘陵沟壑区和沙漠接壤区等4种不同生态区位不同类型公益林为对象,利用层次分析法建立了甘肃省4种生态区位公益林生态效益评价指标体系,并结合野外调查及实验室分析数据,对不同生态区位不同林分类型公益林生态效益进行评分。结果表明:对同一生态区位,乔木林生态效益大于灌木林,阔叶混交林生态效益大于针叶纯林;对同一林分类型,阔叶混交林具有较高的水源涵养、土壤保持及生物多样性保护功能,针叶纯林保持水土流失功能高于其生物多样性保护功能,阔叶纯林和灌木林则具有较高的水源涵养功能。
Taking four types of public welfare forests in the four different ecological regions as the banks of the banks of the Yangtze and Yellow Rivers in Gansu Province, the national-level nature reserves in the Loess Plateau, the hilly and gully regions in the Loess Plateau, and desert regions as the targets, four kinds of public welfare zones in Gansu Province Based on field investigation and laboratory analysis data, ecological benefits of different types of forest in different ecological locations were scored. The results showed that: for the same ecological location, the ecological benefit of arbor forest is greater than that of shrub forest and broad-leaved mixed forest, and the ecological benefit of coniferous forest and broad-leaved mixed forest is higher than that of pure coniferous forest. For the same forest type and broad-leaved mixed forest, higher ecological protection, conservation of water and conservation of biodiversity Function, conifer pure forest to maintain soil erosion function is higher than its biodiversity conservation function, broad leaved forest and shrubs have high water conservation function.