基于"压力-状态-响应"框架的长江上游防护林健康评价

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。

HEALTH ASSESSMENT OF PROTECTION FOREST BASED ON PRESSURE STATE RESPONSE MODEL

Protection forest health assessment is the basic programs for improving its ecological service function and scientific management. Based on the Pressure State Response (PSR) model,the health assessment index system included 20 indices was constructed for protection forest in the upper reaches of the Yangtze River,and each weight of the indices in the system was evaluated by analytical hierarchy process (AHP)，and modified by entropy technology.Utilizing the method of health indices to assess the state of main forest community in the sampling plots,the results showed that (1) The average health index in the Guansi River Valley was 4695；(2)The forest health data of tested forest community are as follows:Quercetum(55.43),mixed Alnus Cupressus forest(52.54),mixed Pinus Cupressus forest(50.84),Cupressus funebris forest(49.68),Pinus massoniana forest(38.92).Health assessment of protection forest could be a way for improving the spatial allocation and stand structure of protection forest in the upper reaches of the Yangtze River.