论文信息 - Emissions of C02 from energy crop production

Emissions of C02 from energy crop production

Abstract Estimates of CO 2 emissions in kg C dry Mg −1 of biomass produced under present and likely future production technology (with biomass yields in dry Mg ha −1 in parentheses) are: hybrid poplar, 25.8 (11.3) and 21.8 (18.5); sorghum, 32.0 (13.3) and 21.8 (30.2); and switchgrass, 32.9 (9.0) and 29.2 (14.4). The lower yield for each energy crop can be achieved today, while the potential exists to reach the higher yield, and under some circumstances the higher yield can be reached today. On a kg C GJ −1 basis, CO 2 emissions from production of energy crops range from a high of 1.9 for switchgrass to a low of 1.1 at the higher yield for hybrid poplar. These carbon releases are considerably lower than emissions from fossil fuels, which on a kg C GJ −1 bases are 13.78, 22.29, and 24.65 for natural gas, petroleum, and coal, respectively.

Robert D. Perlack | Anthony F Turhollow | R. Perlack | A. Turhollow

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