陇东黄土丘陵沟壑区森林生态服务功能及其价值评估

Forest Ecological Service Function and Its Value Evaluation in the Loess Hilly and Gully Regions of Longdong

探讨陇东黄土丘陵沟壑区森林资源生态服务功能价值,为该区域生态修复保护及森林生态服务功能评估提供可推广、可复制的范式。以泾川县2018年森林资源二类调查数据及相关文献资料为基础,依据《森林生态系统服务功能评估规范》,选取4方面10个指标构建评估体系,采用市场价值法、价格替代法等方法,评估陇东黄土丘陵沟壑区森林生态服务功能价值。结果表明,2019年泾川县森林生态系统总服务价值为283600.0万元。涵养水源服务价值最大,占总服务价值50.76%;文化旅游服务价值最小,占总服务价值的0.0025%;生态林以涵养水服务价值为主,经济林以供给服务价值为主,生态林年服务功能价值为经济林的3.8倍。涵养水源、固碳释氧、产品供给3种价值占总服务价值的80.21%,是主要的生态服务功能价值。因地制宜营造培育混交林,加强现有林分修复改造、提升森林资源质量、创新经营策略成为该区域森林资源管理的重点。

In order to explore the ecological service value of forest resources in the loess hilly and gully areas of Longdong(Eastern Gansu),to provide a popular and replicable paradigm for ecological restoration,protection and forest ecological service evaluation in this region.Based on the second-class forest resource survey data of Jingchuan County in 2018 and related literature data,and in accordance with the"Forest Ecosystem Service Function Evaluation Specification"of China,10 indicators from 4 aspects were selected to construct an evaluation system.Methods such as market value method and price substitution method were adopted to conduct the evaluation.The results showed that the total service value of the forest ecosystem in Jingchuan County in 2019 was 283.6000 million yuan.The service value of water conservation was the largest,accounting for 50.76%of the total;the cultural tourism service value was the smallest,accounting for 0.0025%of the total;ecological forests were mainly based on the value of water conservation services,non-timber forest was dominated by the value of supply services,and the annual service function of ecological forests.The ecological value was 3.8 times of the non-timber forest.The three values of water conservation,carbon fixation and oxygen release,and product supply accounted for 80.21%of the total service value,which were the main values for ecological service functions.The key tasks of forest resource management in the region were suggested:to build and cultivate mixed forests according to local conditions,strengthen the restoration and reconstruction of existing forest stands,improve the quality of forest resources,and innovate the management strategies.