| 湟水谷地农业生态经济系统的能值分析——以西宁市为例 |
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| 引用本文： | 张小平,何伟,方婷.湟水谷地农业生态经济系统的能值分析——以西宁市为例[J].干旱区地理,2011,34(2):344-354. |
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| 作者姓名： | 张小平 何伟 方婷 |
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| 作者单位： | 西北师范大学地理与环境科学学院,甘肃,兰州,730070 |
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| 基金项目： | 西北师范大学生态经济学重点学科资助项目 |
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| 摘 要： | 运用能值理论与分析方法,采用净能值产出率、环境负荷率、能值密度、人均能值用量、能值产投比及可持续性指数、系统稳定性指数及优势度指数等重要能值指标对位于湟水谷地的西宁市1990-2008年间农业生态经济系统的能值结构作了深入地分析.结果表明:湟水谷地农业生态系统由1990-2004年的低效率开发阶段逐步转变为2005-2...
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| 关 键 词： | 能值分析 湟水谷地 农业生态系统 西宁市 |
Emergy analysis of agricultural eco-economic system in Huangshui Valley: a case of Xining City |
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| ZHANG Xiao-ping,HE Wei,FANG Tin.Emergy analysis of agricultural eco-economic system in Huangshui Valley: a case of Xining City[J].Arid Land Geography,2011,34(2):344-354. |
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| Authors: | ZHANG Xiao-ping HE Wei FANG Tin |
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| Institution: | ZHANG Xiao-ping,HE Wei,FANG Tin(School of Geography and Environmental Science of Northwest Normal University,Lanzhou 730070,Gansu,China) |
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| Abstract: | Based on the theories and methodologies of energy,through some indicators of energy,such as net energy yield ratio,environmental loading ratio,energy density,energy per capita,energy input-output ratio,energy sustainable indices,stability and dominance indexes of system,and so on,the energy structures of agro-ecosystem in Huangshui Valley,Xinning City,Qinghai Province,China,from 1990 to 2004 year were studied.The results show that the development situation of Huangshui Valley agricultural ecosystems was gra... |
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| Keywords: | energy analysis Huangshui valley agro-ecosystem Xining city |
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