Sustainable energy crop production
Sustainable energy crop production
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DOI：
10.1016/j.cosust.2014.07.007
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发表时间：
2014-11-01
影响因子：
7.2
通讯作者：
Parton, William
中科院分区：
文献类型：
--
作者：
Del Grosso, Stephen;Smith, Pete;Parton, William
目前，生物燃料只满足世界能源需求的一小部分，但由于旨在减少化石燃料使用和相关环境影响的任务规定，这一比例正在增加。然而，植物基原料替代化石燃料和减轻环境影响的潜力是不确定的。许多不确定性与原料生产的一氧化二氮排放量的量化以及将谷物和生物质用作生物燃料原料导致土地用途转换为补偿性耕作（间接土地用途变化）的程度有关。目前的共识是，甘蔗、多年生纤维素作物和废弃生物质提供了明显的效益，而玉米乙醇和油料种子作物也可能提供效益，如果假定间接的土地利用变化可以忽略不计，如果采用推荐的作物管理做法，如使用增效肥料和最小限度的耕作。未来的研究应更好地量化不同地区种植的不同原料的N2O排放量，最佳管理做法减轻这些排放的能力，以及边际土地和增加作物产量以提供生物质的潜力。
Biofuels currently supply a small portion of the world's energy needs but this is increasing due to mandates intended to reduce use of fossil fuels and the associated environmental impacts. However, the potentials of plant based feedstocks to substitute for fossil fuels and mitigate environmental impacts are uncertain. Much of the uncertainty is related to the quantification of nitrous oxide (N2O) emissions from feedstock production and the extent to which use of grain and biomass for biofuel feedstocks leads to land use conversion for compensatory cropping (indirect land use change). Current consensus is that sugar cane, perennial cellulosic crops, and waste biomass provide clear benefits while corn ethanol and oil seed crops may provide benefits if indirect land use change is assumed to be negligible and if recommended crop management practices, such as use of enhanced efficiency fertilizers and minimal tillage, are employed. Future research should better quantify N2O emissions from different feedstocks grown in different regions, the ability of best management practices to mitigate these emissions, and the potential for marginal lands and increased crop yields to supply biomass.