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冰川冻土 ›› 2002, Vol. 24 ›› Issue (4): 374-379.

• 研究论文 • 上一篇    下一篇

干旱区农业生态经济系统的能值分析——以黑河流域中游张掖地区为例

陈东景, 徐中民   

  1. 中国科学院, 寒区旱区环境与工程研究所冻土工程国家重点实验室, 甘肃, 兰州, 730000
  • 收稿日期:2002-05-09 修回日期:2002-06-16 出版日期:2002-08-25 发布日期:2012-04-26
  • 基金资助:
    中国科学院知识创新工程重大项目(KZCX1-09-04;KZCX1-10-03)资助

Emergy Amalysis of Agricultural Eco-Economic System in Arid Region of Northwest China——A Case Study of Zhangye Prefecture in Heihe River

CHEN Dong-jing, XU Zhong-min   

  1. State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou Gansu 730000, China
  • Received:2002-05-09 Revised:2002-06-16 Online:2002-08-25 Published:2012-04-26

摘要: 能值理论(emergytheory)是综合分析生态经济系统的各种能量流的转换机理,并定量研究生态效益与经济效益及其关系的重要理论.在简要阐述能值理论有关内容的基础上,以黑河流域中游张掖地区农业生态经济系统为例进行了实证研究.根据能值的投入产出分析的结果表明,张掖地区的农业发展存在许多问题:环境负荷不断增加、产出率降低、产品经济成本增加、能值持续性指数下降等,这使得该区农业的持续发展受到严重影响.应采取一定的措施来增加农业生态经济系统的产出能力,减小农业生态环境的压力。

关键词: 能值理论, 生态经济系统, 绿洲农业, 可持续发展

Abstract: Emergy theory offered by Odum H T was applied widely to track energy flow and evaluate ecological and economic benefit in eco-economic system. In the paper, basic concepts were explained in brief. Then an empirical analysis of agricultural eco-economic system in Zhangye Prefecture in the middle reaches of the Heihe River was made. A paradigm (1999) of the emergy flow of agricultural eco-economic system was presented in Zhangye Prefecture, together with the main indices that reflect the situation of the system. For the last five years (1995-1999), the analysis showed that environmental load increased from 0.816 to 1.564, yield ratio decreased from 2.116 to 1.902, the ratio of economic input which reflects economic cost of product rose from 3.93 to 6.33, and the index of sustainability reduced from 2.59 to 1.216 in Zhangye district. These indices, which reflect the efficiency of resources use, showed that the development of agricultural eco-economic system faced severe situation in Zhangye Prefecture. Some measures, such as changing agriculture’s structure and increasing the price of water resource etc., should be taken to improve agricultural product conditions in order to achieve sustainable development of agriculture in Zhangye Prefecture. Emergy technique is probably useful at integrated environmental and economic accounting.

Key words: emergy theory, eco-economic system, oasis agriculture, sustainable development, Zhangye Prefecture

中图分类号: 

  • F323.22