2012年湖南省农业生态系统的能值分析  

Emergy Analysis for Agro-ecosystem of Hu'nan Province in 2012

作　　者：周科平[1] 王明球[1] 李斌[1] 张岳[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《水土保持通报》2015年第1期297-302,共6页Bulletin of Soil and Water Conservation

基　　金："十二五"国家科技支撑计划项目"废弃矿区尾矿处理与循环利用技术及示范"(2012BAC09B02);"十二五"国家科技支撑计划项目"复杂地下金属矿二步开采与回收技术"(2013BAB02B05)

摘　　要：[目的]构建农业生态系统的能值评价体系,完善能值分析数据库。[方法]利用能值分析理论,选取能值密度、人均能值使用量、能值自给率、能值投资率、净能值产出率、能值货币比、环境负载率和可持续发展指数等8个指标;通过计算投入能值和产出能值的方法,对2012年湖南省农业生态系统能值进行了分析。[结果]8个评价指标的计算值分别为1.15×1012,3.4×1015 sej,22.35%,3.47,1.5,3.15×1012 sej/$,3.56和0.42。[结论]湖南省农业生态系统能值整体处于中等水平。解决农业能值投入结构是改善该农业生态系统的重要手段。[Objective] To build the emergy evaluation system of agro-eeosystem. [Methods] analysis theory, eight evaluation indicators including emergy density, emergy use per person, emergy self-sufficient ratio, emergy investment ratio, net emergy yield ratio, emergy dollar ratio, environmental loading ratio, and sustain- able development index were chosen to establish the agro-ecosystem evaluating system. By calculating the input and output emergy, agro-ecosystem of Hu＇nan Province in 2012 was analyzed. [Results] The calculat- ed value of eight evaluation indicators mentioned above was 1.15 × 1012 sej/m2 , 3.4 × 1015 sej, 22.35 %, 3.47, 1.5, 3.15 ×1012sej/$ , 3.56 and 0.42, respectively. [Conclusion] The agro-ecosystem of Hu＇nan Province is overall at middle level, and changing the emergy investment structure is the main way to improve the agro- ecosystem.

关 键 词：能值理论 生态经济 农业生态系统 湖南省 

分 类 号：S181[农业科学—农业基础科学]