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利用多因子综合分析和生命周期分析的研究方法,对中国西南5省区(重庆、四川、云南、贵州、广西)适宜木薯种植的宜能边际土地资源潜力、适宜性等级等进行研究,并对该区发展木薯燃料乙醇的能量生产及温室气体减排潜力进行了分析,结果表明:1)西南5省区适宜与较适宜木薯发展的土地资源分别为88.49万和456.62万hm2,主要集中于广西、云南,其中,广西适宜与较适宜的土地资源分别为83.30万和253.64万hm2,云南适宜与较适宜的土地资源分别为5.19万和162.36万hm2;2)若这些土地资源全部被利用,则该区木薯燃料乙醇的净能量最大总生产潜力为6 254.590万GJ/a;3)同时,该区规模化生产木薯燃料乙醇的总温室气体减排潜力为139.016万t/a。本研究结果可为国家及地方政府环境保护、温室气体减排目标和相关产业政策的制定提供参考。
Using multifactor analysis and life cycle analysis, this paper studied the potential and suitability of marginal land suitable for cassava cultivation in 5 provinces (southwest China) (Chongqing, Sichuan, Yunnan, Guizhou and Guangxi) The results showed that: (1) The land resources suitable and suitable for cassava development in 5 provinces and autonomous regions in Southwest China were 884,900 and 4,566,200 hm2 respectively, mainly concentrated in Guangxi , Yunnan, of which, the suitable and suitable land resources in Guangxi were 833,000 and 2,536,400 hm2 respectively, while the suitable and suitable land resources in Yunnan were 51,900 and 1,623,600 hm2, respectively; 2) If all these land resources were utilized, The maximum net production potential of cassava fuel ethanol in this area is 6,245,900 GJ / a; 3) Meanwhile, the total greenhouse gas emission reduction potential of large-scale production of cassava fuel ethanol in this area is 1,390,160 t / a. The results of this study can provide reference for the environmental protection, greenhouse gas emission reduction targets and related industrial policies of national and local governments.