摘要
以草地地上生物量为基础,运用经济学的市场价值法、物质量法、水量平衡法等方法对太仆寺旗和沽源县境内的农牧交错区草地的固定CO2、释放O2、土壤侵蚀控制、涵养水源、营养物质循环5项生态系统服务功能进行初步的评估。结果表明:由这5项功能构成的生态系统服务的间接价值在农区为16 668元/(hm2.a),在草原区为17 223元/(hm2.a)。尽管草原区的间接价值比农区的高3.33%,但研究所选的农牧交错区由于农业活动的干扰,并没有导致草地生态系统服务功能间接价值的显著下降。这说明维持现阶段的农业活动或退耕还草可能促进草地生态系统生态经济价值的可持续性发展;但若继续开垦和破坏草地,草地生态系统的服务功能可能会显著下降,草地所具有的生态屏障作用也会减弱甚至消失。
Based on above-ground biomass of rangeland, the fixation of CO2, release of O2, soil erosion control, conservation of water source and nutrient cycles which were 5 rangeland ecosystem services in northern agro-pastoral ecotone （which lies in Taipusi banner and Guyuan league） were evaluated using market value approach, material balance approach, water budget approach in this paper. The result showed the indirect value of five rangeland ecosystem services in farmland zone and in rangeland zone were 16 668yuan/（hm^2·a） and 17 223 yuan/（hm^2· a）. Although the later was higher 3.33% than the first, it didn＇t lead to significant decrease of indirect value of ecosystem services in study agro-pastoral ecotone site because of the interference of cultivation activities. This indicated that maintaining agricultural activities or returning more farmland to grass might promote sustainable development and ecological role of natural rangeland ecosystem. However, if cultivated or destroyed rangeland continuously, ecosystem services of rangeland would decrease, and ecological barrier role of rangeland also would drop or disappear.
出处
《草业科学》
CAS
CSCD
北大核心
2009年第9期18-23,共6页
Pratacultural Science
基金
国家"十一五"科技支撑项目(2006BAD16B01)
国家重大基础研究项目("973"项目
2007CB106800)
