Spatial and Temporal Dynamics of Soil-Surface Carbon Dioxide Emissions in Bioenergy Corn Rotations and Reconstructed Prairies
dc.contributor.author | Daigh, Aaron | |
dc.contributor.author | Sauer, Thomas | |
dc.contributor.author | Xiao, Xinhua | |
dc.contributor.author | Horton, Robert | |
dc.contributor.department | Agronomy | |
dc.date | 2018-01-25T07:54:07.000 | |
dc.date.accessioned | 2020-06-29T23:04:54Z | |
dc.date.available | 2020-06-29T23:04:54Z | |
dc.date.issued | 2014-01-01 | |
dc.description.abstract | <p>The interest in bioenergy crops has raised questions as to the potential of management strategies to preserve soil C pools and soil quality. Since soil-surface CO<sub>2</sub> effluxes are a major fate of soil C, knowledge of CO<sub>2</sub> efflux’s spatial and temporal trends among bioenergy crops will facilitate advances in research on improving terrestrial C-cycle models as well as decision support tools for policy and land-management. Our objective was to evaluate spatial and temporal dynamics of soil-surface CO<sub>2</sub> effluxes in bioenergy-based corn (<em>Zea mays</em> L.) and reconstructed prairie systems. Systems evaluated included continuous corn (harvested for grain and 50% of the corn stover) with and without a cover crop, mixed prairies (harvested for aboveground biomass) with and without N fertilization, and corn–soybean [<em>Glycine max</em> (L.) Merr.] rotations harvested for grain. Soil-surface CO<sub>2</sub> effluxes, soil temperature, and soil water contents were monitored weekly from July 2008 to September 2011 and hourly during portions of 2010 and 2011. Annual soil-surface CO<sub>2</sub> effluxes were greater in prairies than row crops and are attributed to greater plant root respiration. Soil-surface CO<sub>2</sub> effluxes spatially varied among intra-crop management zones only for continuous corn with stover removal. However, the cover crop reduced CO<sub>2</sub> efflux spatial variability 70% of the time as compared to stover removal without a cover crop. Spatial variability of effluxes was not explained by soil physical properties or conditions. Temperature-induced diurnal fluctuations of CO<sub>2</sub> effluxes were not evident during apparent soil–water redistribution. Further research on the mechanisms behind this process is needed followed by incorporation of mechanisms into CO<sub>2</sub>efflux models.</p> | |
dc.description.comments | <p>This article is published as Daigh, Aaron L., Thomas J. Sauer, Xinhua Xiao, and Robert Horton. "Spatial and temporal dynamics of soil-surface carbon dioxide emissions in bioenergy corn rotations and reconstructed prairies." Soil Science Society of America Journal 78, no. 4 (2014): 1338-1350. doi: <a href="http://dx.doi.org/10.2136" target="_blank">10.2136/sssaj2014.02.0072</a>. Posted with permission.</p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/agron_pubs/400/ | |
dc.identifier.articleid | 1447 | |
dc.identifier.contextkey | 11409293 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | agron_pubs/400 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/4755 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/agron_pubs/400/2014_Horton_SpatialTemporal.pdf|||Sat Jan 15 00:07:45 UTC 2022 | |
dc.source.uri | 10.2136/sssaj2014.02.0072 | |
dc.subject.disciplines | Agriculture | |
dc.subject.disciplines | Agronomy and Crop Sciences | |
dc.subject.disciplines | Natural Resources and Conservation | |
dc.subject.disciplines | Soil Science | |
dc.title | Spatial and Temporal Dynamics of Soil-Surface Carbon Dioxide Emissions in Bioenergy Corn Rotations and Reconstructed Prairies | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | d3fb0917-6868-417e-9695-a010896cfafa | |
relation.isOrgUnitOfPublication | fdd5c06c-bdbe-469c-a38e-51e664fece7a |
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