干旱对生物能源供应系统风险和生物量组成的影响

Amber N. Hoover, Rachel M. Emerson, J. Hansen, Damon S. Hartley, Allison E. Ray
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引用次数: 4

摘要

生物能源是世界范围内重要的可再生能源选择,但该行业容易受到包括生物质能供应在内的无数风险的影响,干旱是其中的一个因素。干旱期间农作物产量下降,增加了农业的年复一年的风险。特别是对可再生能源产业来说,干旱对农作物的影响是巨大而复杂的。本章讨论了目前关于干旱如何影响可再生能源生物质的知识状况,因为它与干生物质产量和化学有关,后者严重影响生产成本和最终产品产量。先进的供应系统是减少生物质供应风险的一种选择。在干旱等不可控事件中,这些系统导致作物产量更高、变化更小;然而,由于干旱对植物化学的影响,干旱年份供应的材料质量仍可能有所不同。本章对四种生物能源作物的化学成分进行了分析,发现干旱年份的碳水化合物和木质素都比干旱年份有所减少。这些化学变化可以通过抑制剂的形成和预处理过程中可降解性的改变来影响生化转化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Drought Impacts on Bioenergy Supply System Risk and Biomass Composition
Bioenergy is an important renewable energy option worldwide, but the industry is susceptible to a myriad of risks including biomass supply, of which drought plays a role. Crops yields decrease during drought, increasing year-to-year risk for the agricultural industry. For the renewable energy industry, in particular, the effect of drought on crops is substantial and complex. This chapter discusses the current state of knowledge regarding how drought affects biomass destined for renewable energy as it relates to dry biomass yields and chemistry, the latter of which heavily impacts cost of production and final product yields. Advanced supply systems are one option for reducing biomass supply risk. These systems lead to higher, less variable crop yields during uncontrollable events like drought; however, the quality of material supplied in a drought year may still vary as drought impacts plant chemistry. This chapter provides analysis for chemical composition of four bioenergy crops observing that both carbohydrates and lignin decrease during a drought year compared to a year with minimal to no drought. These chemical changes can impact biochemical conversion through inhibitor formation and altering degradability during pretreatment.
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