Exergetic assessment for ecological economic system: Chinese agriculture

doi:10.1016/j.ecolmodel.2008.10.006

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	Exergetic assessment for ecological economic system: Chinese agriculture
	Chen, G. Q. ; Jiang, M. M. ; Yang, Z. F. ; Chen, B. ; Ji, Xi ; Zhou, J. B.
刊名	ecological modelling
	2009
关键词	Exergy Environmental resources Agriculture Ecological economy RESOURCE ANALYSIS NORWEGIAN SOCIETY ENERGY EMERGY CONVERSION ACCOUNT FUELS POWER
DOI	10.1016/j.ecolmodel.2008.10.006
英文摘要	Based on the thermodynamic concept of exergy as a unified measure for environmental resources and economic products, a framework for systems assessment is presented for ecological economies. With a typical systems diagram devised for a general ecological economy with four arm fluxes for free local natural resources, purchased economic investment, environmental impact and economic yield, system indices of the renewability index, exergy yield ratio, exergy investment ratio, environmental resource to yield ratio, system transformity and environmental stress index are defined for a congregated systems ecological assessment with essential implications to sustainability. As a detailed case study to the Chinese agriculture from 1980 to 2000 with cropping, forestry, stockbreeding and fishery sectors, extensive exergy account and systems assessment are carried out with emphasis on annual and structural variations against social political transitions. For the overall agriculture as a congregated ecological stage, the value of the system transformity is found around 10, the typical value for the general ecological hierarchy as well devised by Odum associated with Lindeman's Tenth Law. (C) 2008 Elsevier B.V All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000263209400011&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Ecology; SCI(E); EI; 27; ARTICLE; 3; 397-410; 220
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154943]
专题	工学院
推荐引用方式 GB/T 7714	Chen, G. Q.,Jiang, M. M.,Yang, Z. F.,et al. Exergetic assessment for ecological economic system: Chinese agriculture[J]. ecological modelling,2009.
APA	Chen, G. Q.,Jiang, M. M.,Yang, Z. F.,Chen, B.,Ji, Xi,&Zhou, J. B..(2009).Exergetic assessment for ecological economic system: Chinese agriculture.ecological modelling.
MLA	Chen, G. Q.,et al."Exergetic assessment for ecological economic system: Chinese agriculture".ecological modelling (2009).