基于生态环境损失的农业生态系统能值分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Emergy Analysis of Agricultural Ecosystem Based on Ecological Environment Loss

Author(s):: Wang Huiliang; Wu Zening; Guo Xi; Guo Ruili; School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou, Henan 450001

Keywords:: ecological environmental loss; agriculture ecosyste; memergy analysis; Zhengzhou

摘要:: 针对目前研究中没有考虑生态环境损失的问题,提出了基于生态环境损失的农业生态系统能值分析研究思路和方法.以郑州市为例,计算了郑州市2000~2009年农业生态系统的能值投入和产出,以及农业生态环境能值损失和相关能值指标.结果显示,郑州市近10年农业生产造成的平均生态环境损失为2.44×1021 sej,占能值产出的15.47%,与现有国内外研究认为农业外部成本占农业收入的6%~30%的结论基本吻合；系统能值产出在扣除农业生态环境损失后,平均净能值产出率从2.86下降到2.45,平均可持续发展指数从1.19下降到1.01,说明农业生态环境损失对系统生产效率和可持续影响显著.

Abstract:: Emergy analysis of agriculture ecosystem was a hot topic of academic group nowadays. Concerned with the loss of ecological environment, an improved emergy analysis of agriculture ecosystem was proposed based on the calculation of agriculture ecological environment loss. Taking Zhengzhou as the example, this pa-per discussed how to apply it to practice. The results showed that the average ecological environmental loss of Zhengzhou from 2000 to 2009 was 2. 44 × 1021 sej,accounting for 15. 47% of economic emergy out of agricul-ture ecosystem. The method was rational for its conclusion was in agreement with the domestic and internation-al research results,the proportion of agricultural externality to agricultural income was 6% ~30%. Given the agriculture ecological environment loss subtracted from economic emergy output, the average Net emergy yield ratio EYRL fallen from 2. 86 to 2. 45, and the average emergy sustainable indices ESIL from 1. 19 to 1. 01, in-dicating that the influence of ecological environmental loss on eco-efficiency and performance of system was significant.