基于能值分析的聊城市农业生态系统可持续性研究  

Study on Sustainability of Agricultural Ecosystem in Liaocheng City based on Emergy Analysis

作　　者：徐梦辰[1] 

机构地区：[1]聊城大学环境与规划学院,山东聊城252059

出　　处：《天津农业科学》2015年第9期29-33,43,共6页Tianjin Agricultural Sciences

基　　金：国家自然科学基金(40901276);山东省软科学项目(2009RKB01052)

摘　　要：根据2003—2012年聊城市农业生态系统数据,运用能值理论方法,分析该市生态农业的投入与产出,采用可更新资源能值比率、能值自给率、净能值产出率、能值投资率、环境负载率和可持续发展指数等指标,对聊城市农业生态系统进行全面评价。结果表明:在能值投入上,主要依赖于后期的工业辅助能,而对当地环境资源的依赖程度较低;在能值产出上,畜牧业取得长足发展,已超过种植业,成为优势产业;研究区农业生态系统属于消费型,可持续发展指数逐年降低,仅维持在0.1以下,环境负荷率逐年升高,最高达15.5,区域环境压力大,生态状况难以改善。聊城市今后应大力发展节水灌溉农业,积极引进先进技术,调整工业辅助能投入,提高能值受益率,探索建立多层次、高功能的生态农业模式。Through analyzing the emergy input and output of agro-ecosystem of Liaocheng, discussed the security of agro-ecosystem structure. This paper helped coordinate the relationship between agriculture production and ecological environment and provides ref- erences for scientific management of the sustainable development of Liaocheng. Based on the data of agro-ecosystem of Liaocheng in 2003-2012, used the methods of emergy and calculated some indicators of emergy, such as renewable resources emergy ratio, emergy self-sufficiency ratio, net emergy yield ratio, emergy investment ratio, environmental loading ratio and emergy sustainable index to analyze comprehensively on agriculture system of Liaocheng City. The research results showed on the emergy input, agriculture e- cosystem rely mainly on industrial auxiliary emergy and the level of dependence on the local environment resources was low; on the emergy output, animal husbandry had a substantial progress, becoming a dominant industry, and exceeded the planting industry; the agro-eeosystem system in the study area belonged to consumer type, with the emergy sustainable index decreasing gradually （only keep below 0.01） and the environmental loading ratio increasing year by year （the most up to 15.5）. The regional environmental pressure was enormous and ecological status was difficult to improve. Future agricultural ecosystem management should vigorously de- velop water-saving irrigation agriculture with actively introducing advanced technology, adjusting industrial auxiliary energy input and enhancing emergy value benefit rate. Explored establishing multi-level and high function of ecological agriculture model.

关 键 词：农业生态系统 能值分析 可持续发展 聊城市 

分 类 号：F062.2[经济管理—政治经济学]