基于能值理论的集贤县农业生态系统可持续性评价

从能量流动着手,利用能值分析理论和方法对集贤县2008 ～ 2012年农业生态系统的能值投入产出情况、生态系统运行情况、环境承载情况做了定量分析.分析发现,集贤县高科技物资投入量比较少,经济发展对环境资源的依赖程度较高,但对环境造成的承栽压力较小,环境资源未得到最有效的利用.农业发展水平不高,农业生态系统的发展水平还未达到高效利用,农业发展仍有很大的发展潜力.但因不可更新环境资源能值利用率较高,系统的可持续发展能力较低,需提高农牧民的文化素质,引进高科技生产技术,增加农业生产的技术含量,有效利用集贤县农业生态系统中丰富的物质能源,提高农业生产效率,加速农业生态发展.

Assessment of Eco-system Sustainable Development in Jixian County Based on Emergy Theory

Starting from the energy flow,the input-output condition,work efficiency,and environmental load of the agro-ecosystem in Jixian County were systematically assessed based on the method of energy analysis from 2004 to 2012.Analysis found that the high-techmaterial input less investment in high-techmaterials economic development high dependence on environmental resources,but carries less pressure on the environment,environmental resources have not been the most effective use,agricultural development level is not high.The agriculture development level has not yet reached the efficient use.Agricultural development still has great potential for development.But because of higher utilization of environmental resources,and lower capacity for sustainable development,the cultural quality of farmers and herdsmen should be improved.The hightech production technology should be introduced to increase agricultural production technology,improve agricultural productivity,accelerate the development of ecological agriculture.