五马河流域农田生态系统服务价值评估

为贵州省农田生态系统服务研究与赤水河流域生态环境建设提供参考,利用五马河流域国产高分一号和高分二号遥感影像,通过人机交互判读解译与实地验证获得研究区农田的空间分布,参考《千年生态系统评估》的分类方法,采用市场价值法、影子工程法、机会成本法等方法对五马河流域农田生态系统的7项服务功能进行物质量及价值量评估。结果表明:五马河流域农田生态系统每年提供的服务总价值为56 546.5万元,单位服务价值为30 838.1元/hm~2;其中,产品提供价值为9 964.3万元,气候调节价值为8 868.2元,光合释氧价值为3 687.0万元,土壤保持价值为9 826.2万元,固碳价值为5 398.2万元,水源涵养价值为10 724.7万元,生物多样性价值为8 077.8万元。

Evaluation on Farmland Ecosystem Service Value in Wuma River Watershed

The spatial distribution of farmland in Wuma River Watershed is obtained by using domestic GF-1 and GF-2 remote sensing image,human-computer interactive interpretation and on-site verification,and the substance amount and value quantity of seven service functions of farmland ecosystem in Wuma River Watershed are evaluated by referring to the classification method of " Millennium Ecosystem Assessment",and using market valuation method,shadow engineering method and opportunity cost method to provide a reference for research of farmland ecosystem service and ecological environment construction of Chishui River Watershed in Guizhou.Results:Total annual service value and unit service value of farmland ecosystem in Wuma River Watershed is 56 546.5 × 104 Yuan and 30 838.1 Yuan/hm2 respectively.The value of availability products,climate regulation,oxygen released from photosynthesis,soil conservation,carbon sequestration,water conservation and biological diversity is 9 964.3 × 104 Yuan,8 868.2×104 Yuan,3 687.0×104 Yuan,9 826.2×104 Yuan,5 398.2×104 Yuan,10 724.7×104 Yuan and 8 077.8 × 104 Yuan respectively.