基于能值理论的中国农业生态经济系统投入产出研究

Input and Output Study of Agricultural Eco-economic System of China Based on the Theory of Emergy Analysis

应用Odum H T的能值理论方法,对中国农业生态经济系统的能值投入产出进行了研究.结果表明:1983年到2007年,中国农业生态经济系统总投入能值呈稳定增长趋势,从2.07×1024sej增至4.71×1024sej,年均增长5.31%,但总投入的增长几乎全是辅助能值的贡献.对中国农业生态经济系统能值产出进行分解比较后发现,中国农业生态经济系统的发展速度由高到低依次为渔业、畜牧业、林业、种植业.为了促进中国农业的可持续发展,应加强可更新资源的利用,增大农业的科学技术研究和推广力度,优化系统的投能结构.

Based on the theory of emergy analysis created by Odum H T, this article investigates quantita tively the emergy flow of agricultural eco-economic systems in China. from 1983 to 2007,The full emergy input of agricultural eco-economic systems in China show a trend of stabilization, from 2.07×10^24 sej increased to 4.71×10^24 sej, the average year rise rate is 5.31%. But the full emergy input is almost the contribute of assistant emergy. The study indicate the develop speed of agricultural eco-economic system in China is fishery forest farming. In order to accelerate sustainable develop of China agriculture, We should strengthen utilization of rebrith environment emergy, aggrandizement effort of study and extend technology, optimize structure of input emergy.