摘要
草地农业生态系统的能量分析从能流着手进行草地农业生态系统的功能量化分析,是草地农业生态系统重要的研究方法之一。分析了草地农业生态系统能量分析目前存在的问题,介绍了Odum的能值分析理论对传统能量分析方法的新发展,将能值分析的方法、基本步骤和评价指标引入草地农业生态系统中,提出了草地农业生态系统能值分析方法推广中亟待解决的难点和应用中的一些设想。
Traditional energy analysis of grassland agro-ecosystem, from the viewpoint of energy flow, is a quantitative study on the function of grassland agro-ecosystem. However, it has drawbacks in many aspects. One is that various energy types, including materials and services, cannot be compared or totaled only by energy quantity. It may result in inaccurate analysis and economic index, which will misguide us in the forming of relevant policies. This will endanger sustainable agriculture and development. Emergy Analysis created by Odum is a new method to evaluate natural capital and ecosystem services . With the unified unit, emergy theory can bridge the natural system and social-economic system. Ecologists and ecological economists have applied the theory all over the world, and the trend is continuous. This paper recommends the main steps and the indices of using emergy analysis method in grassland agro-ecosystem research. It points out the urge problems in development process of emergy analysis technology and theory, and gives some tentative plans in practice of grassland agro-ecosystem.
出处
《草业学报》
CSCD
2005年第4期1-7,共7页
Acta Prataculturae Sinica
基金
国家自然科学基金项目(90102011)
农业部草地农业生态系统学重点开放实验室经费资助。
