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

ZHOU Keping; WANG Mingqiu; LI Bin; ZHANG Yue

doi:10.13961/j.cnki.stbctb.2015.01.054

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

- Emergy Analysis for Agro-ecosystem of Hu'nan Province in 2012
- Bulletin of Soiland Water Conservation Vol. 35, Issue 1, Pages: 297-302(2015)
- 作者机构：
  
  中南大学资源与安全工程学院,湖南,长沙,410083
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.01.054
  CLC：
- Published：2015
- 稿件说明：
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ZHOU Keping, WANG Mingqiu, LI Bin, et al. Emergy Analysis for Agro-ecosystem of Hu'nan Province in 2012[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 297-302.
DOI：

ZHOU Keping, WANG Mingqiu, LI Bin, et al. Emergy Analysis for Agro-ecosystem of Hu'nan Province in 2012[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 297-302. DOI： 10.13961/j.cnki.stbctb.2015.01.054.

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1.15×10

3.4×10

sej

22.35%

3.47

1.5

3.15×10

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。

Abstract

[Objective] To build the emergy evaluation system of agro-ecosystem.[Methods] Based on the emergy 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 sustainable 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 calculated value of eight evaluation indicators mentioned above was 1.15×1012sej/m2

3.4×1015sej

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

Keywords

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