Proceedings 2008 |
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CD-AY-332 |
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Emerging Biofuel Crops & Technologies United States energy policy requires 36 billion gallons of ethanol by the year 2022, with 21 billion gallons coming from cellulosic feedstocks. This has served as a catalyst for ramping up technological advancement with 2nd gerneration biofuel crops including perennial warm season grass crops and other non-food crop bioenergy sources. Further complicating the issue is the convergence of several factors which significantly increase the production demand on global agricultural systems. These factors include: increased population levels; increased affluence and commensurate increases in demand for diets higher in meat protein; and, utilization of agricultural commodities for renewable fuels. This presentation will focus on recent advancements in bioenergy crops including crops designed for marginally productive lands not currently managed for food crop production. Additionally, the presentation will assess the environmental aspects of alternative liquid fuel production, particularly in the area of net greenhouse gas (GHG) production, and carbon sequestration potential. As we move to cellulosic sources of feedstock for ethanol production, questions arise on the potential soil carbon and greenhouse gas implications in cropping systems where corn stover or other plant biomass is removed. On the somewhat marginal soils typical of the Great Lakes Region, we calculate that a minimum of 7500 lb of corn stover is needed per acre in each cycle of a corn soybean rotation just to maintain soil organic matter at current levels. Kurt Thelen Associate Professor and Extension Specialist |