Miscanthus biomass productivity within US croplands and its potential impact on soil organic carbon
Abstract
Interest in bioenergy crops is increasing due to their potential to reduce greenhouse gas emissions and dependence on fossil fuels. Here, we combined process-based and geospatial models to estimate the potential biomass productivity of miscanthus and its potential impact on soil carbon stocks in the croplands of the continental United States. The optimum (climatic potential) rainfed productivity for field-dried miscanthus biomass ranged from 1 to 23 Mg biomass ha-1 yr-1, with a spatial average of 13 Mg ha-1 yr-1 and a coefficient of variation of 30%. This variation resulted primarily from the spatial heterogeneity of effective rainfall, growing degree days, temperature, and solar radiation interception. Cultivating miscanthus would result in a soil organic carbon (SOC) sequestration at the rate of 0.16–0.82 Mg C ha-1 yr-1 across the croplands due to cessation of tillage and increased biomass carbon input into the soil system. We identified about 81 million ha of cropland, primarily in the eastern United States, that could sustain economically viable (>10 Mg ha-1 yr-1) production without supplemental irrigation, of which about 14 million ha would reach optimal miscanthus growth. To meet targets of the US Energy Independence and Security Act of 2007 using miscanthus as feedstock, 19 million hamore »
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States). Environmental Science Division; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Earth Sciences Division; Univ. of California Berkeley, Berkeley, CA (United States). Energy and Resources Group
- Univ. of California Berkeley, Berkeley, CA (United States). Energy and Resources Group
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1396036
- Grant/Contract Number:
- AC02-06CH11357; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Global Change Biology. Bioenergy
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 4; Journal ID: ISSN 1757-1693
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; biofuel; biomass; carbon sequestration; cropland; miscanthus; soil organic carbon
Citation Formats
Mishra, Umakant, Torn, Margaret S., and Fingerman, Kevin. Miscanthus biomass productivity within US croplands and its potential impact on soil organic carbon. United States: N. p., 2012.
Web. doi:10.1111/j.1757-1707.2012.01201.x.
Mishra, Umakant, Torn, Margaret S., & Fingerman, Kevin. Miscanthus biomass productivity within US croplands and its potential impact on soil organic carbon. United States. https://doi.org/10.1111/j.1757-1707.2012.01201.x
Mishra, Umakant, Torn, Margaret S., and Fingerman, Kevin. Fri .
"Miscanthus biomass productivity within US croplands and its potential impact on soil organic carbon". United States. https://doi.org/10.1111/j.1757-1707.2012.01201.x. https://www.osti.gov/servlets/purl/1396036.
@article{osti_1396036,
title = {Miscanthus biomass productivity within US croplands and its potential impact on soil organic carbon},
author = {Mishra, Umakant and Torn, Margaret S. and Fingerman, Kevin},
abstractNote = {Interest in bioenergy crops is increasing due to their potential to reduce greenhouse gas emissions and dependence on fossil fuels. Here, we combined process-based and geospatial models to estimate the potential biomass productivity of miscanthus and its potential impact on soil carbon stocks in the croplands of the continental United States. The optimum (climatic potential) rainfed productivity for field-dried miscanthus biomass ranged from 1 to 23 Mg biomass ha-1 yr-1, with a spatial average of 13 Mg ha-1 yr-1 and a coefficient of variation of 30%. This variation resulted primarily from the spatial heterogeneity of effective rainfall, growing degree days, temperature, and solar radiation interception. Cultivating miscanthus would result in a soil organic carbon (SOC) sequestration at the rate of 0.16–0.82 Mg C ha-1 yr-1 across the croplands due to cessation of tillage and increased biomass carbon input into the soil system. We identified about 81 million ha of cropland, primarily in the eastern United States, that could sustain economically viable (>10 Mg ha-1 yr-1) production without supplemental irrigation, of which about 14 million ha would reach optimal miscanthus growth. To meet targets of the US Energy Independence and Security Act of 2007 using miscanthus as feedstock, 19 million ha of cropland would be needed (spatial average 13 Mg ha-1 yr-1) or about 16% less than is currently dedicated to US corn-based ethanol production.},
doi = {10.1111/j.1757-1707.2012.01201.x},
journal = {Global Change Biology. Bioenergy},
number = 4,
volume = 5,
place = {United States},
year = {Fri Aug 10 00:00:00 EDT 2012},
month = {Fri Aug 10 00:00:00 EDT 2012}
}
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