Arid
DOI10.1039/c5ee00242g
The potential of CAM crops as a globally significant bioenergy resource: moving from ’fuel or food’ to ’fuel and more food’
Mason, P. Michael1,2; Glover, Katherine2; Smith, J. Andrew C.3; Willis, Kathy J.4; Woods, Jeremy5; Thompson, Ian P.1
通讯作者Mason, P. Michael
来源期刊ENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
EISSN1754-5706
出版年2015
卷号8期号:8页码:2320-2329
英文摘要

Bioenergy is widely seen as being in competition with food for land resources. This note examines the potential of plants that use the mode of photosynthesis known as crassulacean acid metabolism (CAM) to generate globally significant quantities of renewable electricity without displacing productive agriculture and perhaps even increasing food supply. CAM plants require of the order of 10-fold less water per unit of dry biomass produced than do common C-3 and C-4 crops, and because of their succulence are endowed with substantial water-storage capacities that helps to buffer intermittent water availability. This allows them to thrive in areas where traditional agriculture struggles, either because of low rainfall, or because the seasonality or unpredictability of rainfall is too great to allow profitable arable farming. Although as a group these plants are understudied, sufficient data are available to support estimates of the contribution they might make to global electricity supply if used as feedstock for anaerobic digestion. Two CAM species are examined here as potential bioenergy crops: Opuntia ficus-indica and Euphorbia tirucalli. Both show the high degree of drought tolerance typical of CAM plants and produce promising yields with low rainfall. Even CAM plants in semi-arid areas may have opportunity costs in terms of lost agricultural potential, but an alternative approach to bioenergy may allow the food value of land to be increased whilst using the land for energy. Global power generation from gas is around 5 PW h per year. The data suggests that 5 PW h of electricity per year could be generated from CAM plants cultivated on between 100 and 380 million hectares of semi-arid land, equivalent to between 4% and 15% of the potential resource.


类型Article
语种英语
国家England
收录类别SCI-E
WOS记录号WOS:000358730600006
WOS关键词OPUNTIA-FICUS-INDICA ; CRASSULACEAN ACID METABOLISM ; WATER-USE EFFICIENCY ; PRICKLY-PEAR ; BIOLOGICAL-CONTROL ; BIOFUEL FEEDSTOCK ; SOUTH-AFRICA ; L. MILL. ; CACTACEAE ; PLANTS
WOS类目Chemistry, Multidisciplinary ; Energy & Fuels ; Engineering, Chemical ; Environmental Sciences
WOS研究方向Chemistry ; Energy & Fuels ; Engineering ; Environmental Sciences & Ecology
来源机构University of Oxford
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/186916
作者单位1.Univ Oxford, Dept Engn Sci, Oxford OX1 3PJ, England;
2.Trop Power Ltd, Oxford OX4 4EF, England;
3.Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, England;
4.Royal Bot Gardens, Richmond TW9 3AB, Surrey, England;
5.Univ London Imperial Coll Sci Technol & Med, Ctr Environm Policy, London SW7 2AZ, England
推荐引用方式
GB/T 7714
Mason, P. Michael,Glover, Katherine,Smith, J. Andrew C.,等. The potential of CAM crops as a globally significant bioenergy resource: moving from ’fuel or food’ to ’fuel and more food’[J]. University of Oxford,2015,8(8):2320-2329.
APA Mason, P. Michael,Glover, Katherine,Smith, J. Andrew C.,Willis, Kathy J.,Woods, Jeremy,&Thompson, Ian P..(2015).The potential of CAM crops as a globally significant bioenergy resource: moving from ’fuel or food’ to ’fuel and more food’.ENERGY & ENVIRONMENTAL SCIENCE,8(8),2320-2329.
MLA Mason, P. Michael,et al."The potential of CAM crops as a globally significant bioenergy resource: moving from ’fuel or food’ to ’fuel and more food’".ENERGY & ENVIRONMENTAL SCIENCE 8.8(2015):2320-2329.
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