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长江上游防护林健康评价对提高防护林生态服务功能有着重要作用。基于“压力-状态-响应”分析框架,选取20项指标建立了长江上游防护林健康评价指标体系,并利用熵技术修正层次分析法确定评价指标体系的权重;运用等级赋分法对评价指标无量钢化,使不同区域的防护林健康评价结果具有可比性。利用健康指数法对官司河流域的主要防护林群落马尾松林、柏树林、栎树林、松柏混交林、桤柏混交林健康水平进行定量化研究。评价结果表明:官司河流域防护林综合健康指数为46.95,各种类型防护林健康指数从高到低依次为:栎树林(55.43)>桤柏混交林(52.54)>松柏混交林(50.84)>柏树林(49.68)>马尾松林(38.92)。研究结果对于长江上游防护林的空间配置与结构优化有一定的参考价值。
The evaluation of shelter forest health in the upper reaches of the Yangtze River plays an important role in improving the ecological service function of shelterbelts. Based on the “pressure-state-response ” analysis framework, 20 indicators were selected to establish the health evaluation index system of shelterbelts in the upper reaches of the Yangtze River. The entropy technique was used to modify the AHP to determine the weight of the evaluation index system. Immeasurable steel, so that different regions of shelterbelt health assessment results are comparable. The health index of the main shelterbelt community in Guansihe River Basin was used to quantify the health status of Pinus massoniana, Cypress, Oak, Mixed coniferous and Cypress forests. The evaluation results showed that the comprehensive health index of shelterbelts in Guansihe watershed was 46.95, and the health indexes of shelterbelts in various types ranged from high to low: oak forest (55.43)> cypress mixed forest (52.54)> coniferous mixed forest (50.84)> cypress forest (49.68)> Pinus massoniana (38.92). The research results have certain reference value for the spatial distribution and structure optimization of shelterbelts in the upper reaches of the Yangtze River.