The global potential for Agave as a biofuel feedstock
The global potential for Agave as a biofuel feedstock
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DOI：
10.1111/j.1757-1707.2010.01077.x
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发表时间：
2011-02-01
影响因子：
5.6
通讯作者：
Long, Stephen P.
中科院分区：
文献类型：
--
作者：
Davis, Sarah C.;Dohleman, Frank G.;Long, Stephen P.
热带和亚热带的大片地区过于干旱或退化，无法支持粮食作物，但龙舌兰物种可能适合这些地区的生物燃料生产。我们回顾了龙舌兰物种作为生物燃料原料的生态生理学，农艺学和土地利用率的背景下，这属全球的潜力。报告了龙舌兰属的干生物量产量，按年计算，在没有灌溉的情况下，根据物种和地点，从< 1到34兆公顷/年不等。一些最具生产力的物种尚未进行商业规模的评估。大约0.6 Mha以前用于种植粗纤维龙舌兰的土地已经停产，主要是由于与合成纤维的竞争。从理论上讲，如果龙舌兰被重新建立为生物能源原料，而不引起间接的土地利用变化，仅这一作物面积就可以提供61亿升乙醇。全球近五分之一的陆地表面是半干旱的，这表明可能有很大的机会扩大龙舌兰作物作为原料，但需要更多的田间试验来确定不同龙舌兰物种的耐受性界限。
Large areas of the tropics and subtropics are too arid or degraded to support food crops, but Agave species may be suitable for biofuel production in these regions. We review the potential of Agave species as biofuel feedstocks in the context of ecophysiology, agronomy, and land availability for this genus globally. Reported dry biomass yields of Agave spp., when annualized, range from < 1 to 34 Mg ha-1 yr-1 without irrigation, depending on species and location. Some of the most productive species have not yet been evaluated at a commercial scale. Approximately 0.6 Mha of land previously used to grow Agave for coarse fibers have fallen out of production, largely as a result of competition with synthetic fibers. Theoretically, this crop area alone could provide 6.1 billion L of ethanol if Agave were re-established as a bioenergy feedstock without causing indirect land use change. Almost one-fifth of the global land surface is semiarid, suggesting there may be large opportunities for expansion of Agave crops for feedstock, but more field trials are needed to determine tolerance boundaries for different Agave species.