基于能源足迹改进模型的农业区可持续性分析  

Sustainability Analysis in Agricultural Area Based on Modified Energy Ecological Footprint Model

作　　者：方恺[1] 沈万斌[1] 王黎黎[1] 

机构地区：[1]吉林大学环境与资源学院,吉林长春130012

出　　处：《地理与地理信息科学》2010年第6期66-69,共4页Geography and Geo-Information Science

基　　金：国家重点基础研究发展规划项目(2004CB418505);吉林大学研究生创新基金项目

摘　　要：为克服小尺度区域生态足迹计算中能源足迹比例过高、进而导致评价结果过于消极的问题,对能源足迹模型进行了改进:将不同类型土地对CO2的吸收均纳入计算,并引入净生态系统生产力表征植被的碳吸收能力。应用改进前后的两个模型对传统农业区——浙江省桐庐县金牛村的可持续性进行了分析,结果显示:2005-2007年根据传统能源足迹计算的金牛村生态足迹从0.857 hm2增到1.049 hm2,生态赤字从0.481 hm2增到0.652 hm2;根据改进能源足迹计算的生态足迹从0.743 hm2增到0.936 hm2,生态赤字从0.368 hm2增到0.539 hm2。与传统能源足迹相比,改进能源足迹降低约0.113 hm2,其占全村生态足迹的比重减少了12%～15%,结果较理想。研究表明,人为活动对环境的影响已超出生态可承载能力,当地农业呈现不可持续的发展趋势。改进模型更能准确反映研究区自然资源的利用状况,对正确评价传统农业可持续性具有积极意义。To solve the problem of too high proportion of energy ecological footprint in small-scale regional ecological footprint which leaded to a hyper-pessimistie evaluation results, the energy ecological footprint model was modified by taking CO2 absorption of diverse lands into account and introducing net ecosystem productivity to characterize the carbon absorption capacity of vegetation. The sustainability of Jinniu Village, a traditional agricultural area, was analyzed by using traditional and modified models. The results showed that during the period of 2005-2007, the ecological footprint of Jinniu Village increased from 0.857 hm^2 to 1. 049 hm^2 and the ecological deficit ascended from 0. 481 hm^2 to 0. 652 hm^2 based on the traditional model,while the ecological footprint increased from 0. 743 hm^2 to 0. 936 hm^2 and the ecological deficit ascended from 0. 368 hm^2 to 0. 539 hm^2 based on the modified model. It was indicated that the environmental impact of human activities had exceeded the ecological capacity, which represented an unsustainable development tendency. Comparing with the traditional energy ecological footprint, the counterpart decreased by approximately 0. 113 hm^2 ,and its proportion in total ecological footprint descended by 12% -15%, which demonstrated a more optimistic result. In the meanwhile, the reason for differences between two models and the advanta- ges and disadvantages of the modified model was analyzed. It was pointed out that the new model reflect the natural resource utilization of study area＇s natural resources more objectively,which could promote the assessment of the sustainability on traditional agriculture area in a precise way.

关 键 词：生态足迹 能源足迹 净生态系统生产力 传统农业区 

分 类 号：Q149[生物学—生态学]