基于能值分析的干旱区农业生态经济系统可持续发展研究——以石羊河下游民勤县为例
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甘肃省自然科学基金项目“石羊河流域生态系统服务价值及其空间变化规律研究”(3ZS041-A25-002)


A Study of Sustainable Development of Agricultural Eco-economical System in Drought Area Based on Energy Value Analysis——A Case Study of Minqin County in the Lower Reaches of Shiyang River in Gansu Province
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    摘要:

    根据民勤县农业生态经济的实际情况,运用能值研究的方法,选取1994—2003年民勤县农业生态破坏较为典型的时期,对该地区这10a来农业生态系统内的相关能流组分及其指标进行了调查和分析。在这一时期,民勤县农业生态经济系统年均能值投入1.51E+21sej,其中环境资源贡献率仅为22.47%,可更新环境资源仅占总能值投入的15.00%,而人类社会经济投入工业辅助能值在总能值投入中却达57.20%。通过比较分析认为,民勤县能值密度一直处于较低水平。另外,从环境载荷率(ELR)来看,民勤县农业生态系统在河西地区范围内已经表现出石化农业的典型特征。从可持续发展指数(ESI)来看,这10a民勤县农业生态系统发展的可持续性不仅很差而且有逐年下降的趋势。

    Abstract:

    Based on the situation of agricultural eco-economy in Minqin County,select the period from 1994 to 2003,when Minqin County was typical in the damages to ecosystem in the region,using energy value method investigate and analyze the components and their indicators related to energy flow within the agro-ecosystems in that 10 years.In the period,the annual energy inputs in agricultural eco-economic system of the county was 1.51E +21 sej,of which contribution of environmental resources was only 22.47% and renewable environmental resources,only 15.00% of the total energy input,while industry supplemental energy in socio-economic inputs reached as high as 57.20% of the total energy.By comparative analysis,Minqin energy density was found to be in a lower level.In view of the environmental loading ratio(ELR),the agricultural ecosystem of Minqin County presented a typical characteristic of petrochemical agriculture in the Hexi region.In view of the energy-based sustainability index(ESI),the sustainability of the agricultural ecosystem development of Minqin County in the 10 years was not only poor,but also showed a declining trend year by year.

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张军谋,石惠春.基于能值分析的干旱区农业生态经济系统可持续发展研究——以石羊河下游民勤县为例[J].水土保持通报,2012,(1):150-155

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  • 收稿日期:2010-11-16
  • 最后修改日期:2011-04-29
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  • 在线发布日期: 2014-11-25
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