高速公路绿地生态系统与农田生态系统服务价值的对比研究——以郑州西南环高速公路为例

Comparison of ecosystem service value of freeway and agriculture——A case study of Southwest Zhengzhou City freeway.

根据黄土沟壑地带高速公路建设不同时期生态系统特征和生态服务功能的内涵,选择了水土保持、固定CO2、释放O2、滞尘、吸收有害气体、营养元素循环等指标,采用物质量和价值量相结合的评价方法,使用市场价值法、影子工程法、生产成本法、机会成本法研究了郑州西南绕城高速公路不同时期生态系统服务功能经济价值。结果表明:研究区建设前农业生态系统服务功能价值平均每年为424.2万元,建设期间为197.5万元,生态防护后为484.6万元。生态防护前后生态服务价值的差异极为显著,防护后生态服务价值超过原农业生态系统价值。

In accordance with the characteristics of freeway ecosystem and the connotation of ecosystem service, soil and water conservation, CO2 fixation, O2 release, dust absorption, deleterious gas （ SO2 ） absorption and nutrient elements cycling were selected as indexes to evaluate ecosystem service at different periods of the southwest suburban freeway of Zhengzhou City by a combination of matter and value quantities based on market value method, shallow engineering method, production cost method and opportunity cost method. Results show total annual service values of agro-ecosystem in the research area to be 4. 242 million Yuan, that of freeway ecosystem before and after ecological protection are 1. 975 and 4. 846 million Yuan respectively. Ecological service values are remarkably different among ecosystems in different freeway service periods.