Emergy Efficiency and Structural Adjustment of Hunan Agro-ecosystem  

湖南农业生态系统的能值效率与结构调整(英文)

作　　者：侯茂章[1] 朱玉林[1] 

机构地区：[1]中南林业科技大学经济学院,湖南长沙410004

出　　处：《Agricultural Science & Technology》2012年第12期2648-2654,共7页农业科学与技术（英文版）

基　　金：Supported by Hunan Provincial Situation and Decision Consultation Project (2012BZZ16);National Social Science Fund of China(11BJY029);Youth Fund Project of Central South University of Forestry and Technology(2011ZB003)~~

摘　　要：[Objective] To analyze the efficiency of Hunan agro-ecosystem in 1980- 2010. [Method] This paper adopts the emergy methods to evaluate the emergy input and output. [Result] The growth of total emergy input was mainly caused by the auxiliary factors in this phase. The proportion of the nonrenewable purchased emergy input to the total auxiliary emergy input increased from 21.80% in 1980 to 33.04% in 2010. In 1980-2010 the total emergy output of the system increased by 2.43 times, the proportions of the stock farming emergy output and fishery emergy output to the total emergy output increased sharply, while those of the planting emergy output and forestry emergy output showed a considerable decline. [Conclusion] The emergy yield ratio of this system was improved but its sustainability was worrying.[目的]分析1980-2010年湖南农业生态系统的产出效率。[方法]本文主要采用能值方法来评估湖南农业生态系统的能值投入与产出。[结果]研究期间湖南农业生态系统的能值总投入增长主要是由各类辅助能投入增加导致的。不可再生的工业辅助能值投入占总辅助能值投入的比例从1980年的21.80%上升到2010年的33.04%。研究期间湖南农业生态系统的能值总产出增加了2.43倍,其中畜牧业和渔业的能值产出占总能值产出的比率大幅增加,而种植业和林业的能值产出占总能值产出的比率有一定程度下降。[结论]湖南农业生态系统的能值产出率有所改善,但其可持续性并不乐观。

关 键 词：Emergy input Emergy output AGRO-ECOSYSTEM Emergy yield ratio Structural adjustment 

分 类 号：S181[农业科学—农业基础科学]