基于能值理论的成都平原秸秆再利用方式-中国生态农业学报.DOC

基于能值理论的秸秆利用生态足迹评估 —以成都平原典型稻麦轮作区为例 摘 要能值分析与生态足迹分析相结合秸秆利用合理性区域秸秆的人均生态足迹以及人均生态承载力·cap-1和0.0342 hm2·cap-1，其人均生态盈余达0.0178 hm2·cap-1和0.0081 hm2·cap-1；2011年大邑县稻草和麦秆利用的人均生态足迹分别为0.0516 hm2·cap-1和0.0209 hm2·cap-1，其人均生态盈余达0.0094 hm2·cap-1和0.0008 hm2·cap-1。这表明广汉市和大邑县的秸秆利用还存在一定程度的消纳空间，尤其是现有秸秆处理结构中未经合理利用甚至废弃的秸秆资源，如能充分再利用，必定会带来显著地社会经济效益和环境生态效益。 关键词 秸秆 能值 生态足迹 成都平原 Ecological footprint evaluation on utilization of straw resources based on emergy theory: a case study in the typical region of rice–wheat rotation in Chengdu Plain Abstract Applying emergy theory and ecological footprint theory, taking Guanghan and Dayi as the typical region of rice–wheat rotation in Chengdu Plain, based on statistical data and survey data in 2011, the utilization status of straw resources was analyzed. Firstly, the emergy of different utilization ways of straw was respectively calculated, and then the values of ecological footprint per capita and ecological capacity per capita were estimated and analyzed by using ecological footprint analysis method. The results showed that the ecological footprint values of the ways of dealing with rice and wheat straw resources in Guanghan were 0.0661 hm2·cap-1 and 0.0342 hm2·cap-1, and the ecological surplus values of the ways were 0.0178 hm2·cap-1 and 0.0081 hm2·cap-1, respectively. The ecological footprint values of the ways of dealing with rice and wheat straw resources in Dayi were 0.0516 hm2·cap-1 and 0.0209 hm2·cap-1, and the ecological surplus values of the ways were 0.0094 hm2·cap-1 and 0.0008 hm2·cap-1, respectively. These indicated there was still some room in the reutilization of straw resources in Guanghan and Dayi. Especially if the unused part of current straw resources should be reused fully, it will greatly promote the agricultural development and acquire the significant economical, ecological and environmental benefits. Key words Straw, Emergy, Ecological footprint, Chengdu Plain 生态足迹模型是可持续发展评价的一种重要方法，它是通过测量人类对自然生态服务的需求与自然所能提供的生态服务之间的差距（基于土地面积的量化指