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《Bulletin of Soil and Water Conservation》 2012-01
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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

ZHANG Jun-mou1,SHI Hui-chun2,3(1.School of Tourism,Gansu United University,Lanzhou,Gansu 730000,China; 2.College of Geography and Environmental Science,Northwest Normal University,Lanzhou, Gansu 730070,China;3.Key Laboratory of Permafrost Engineering,Institute of Environment and Engineering in the Cold and Drought Area,Chinese Academy of Sciences,Lanzhou,Gansu 730000,China)  
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.
【Fund】: 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)
【CateGory Index】: F323.22
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