摘要
甜高粱作为能源作物在世界范围内广受关注,但目前对于甜高粱的空间分布及乙醇生产潜力尚缺乏专门的定量研究。依据气候、土壤、地形和土地利用等空间数据以及相关文献资料,探讨了甜高粱在中国的空间适宜分布。研究表明,我国大部分区域均可种植甜高粱;其中可种植的未利用地面积达5919.2×104hm2,主要集中于新疆和内蒙古等省区;而最适宜甜高粱种植的未利用地面积为286.7×104hm2,主要分布在黑龙江、内蒙古、山东和吉林等地。中国未利用地甜高粱乙醇生产潜力较大,在不考虑其它社会经济限制因素下,总乙醇生产潜力可达11838.5×104t以上。最适宜未利用地的甜高粱乙醇生产潜力为573.4×104-2637.8×104t,平均为1075.2×104t,可满足中国目前E20乙醇汽油84.8%的需求。如在适宜性较差和较适宜的未利用地种植甜高粱,应充分考虑开发成本和能源投入等问题。
As one of the important bio-energy crops,sweet sorghum（Sorghum bicolor（Linn.） Moench subsp bicolor） has attracted the attention of scientific community and decision makers of the world since decades.However,insufficient study has been done about the spatial suitability distribution and ethanol potential of sweet sorghum in China.This paper aims to investigate and evaluate suitability of sweet sorghum across the country′s spatial scales.Data used for the analysis include the spatial data of climate,soil,topography,and land use,and literatures relevant for sweet sorghum studies.It is found from the study,that most of the provinces in China are suitable for sweet sorghum production.However,the suitability levels for sweet sorghum production vary among the regions.Taking unused land as an example,a total of 59.19 million ha of unused land is available for sweet sorghum production,which is mainly located in Xinjiang Uygur Autonomous Region and Inner Mongolia Autonomous Region.The most suitable areas for the production is about 2.87 million ha,those areas are mainly distributed in Inner Mongolia Autonomous Region,Heilongjiang,Shandong and Jilin provinces,and characterized with appropriate natural conditions such as rainfall,soil fertility and land slopes.This study indicates that the ethanol potential of sweet sorghum could reach more than 118.39 million tons from unused land in general,and 5.73-26.38 million tons from the most suitable unused land,with an average level of 10.75 million tons.This amount of ethanol production could meet 84.8% of current demand for E20 gasoline of China.It is suggested from the study,that the cost and energy input should be taken into consideration if more production is expected from less suitable land areas.
出处
《生态学报》
CAS
CSCD
北大核心
2010年第17期4765-4770,共6页
Acta Ecologica Sinica
基金
国家重点基础研究发展计划项目(2009CB421106)
国家科技支撑计划项目(2006BAC18B01)
关键词
甜高粱
生物乙醇
空间分布
乙醇生产潜力
sweet sorghum
bio-ethanol
suitability distribution
ethanol production potential
