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dc.contributor.authorA. Aguilar, Orlando
dc.contributor.authorMaghirang, Ronaldo
dc.contributor.authorW. Rice, Charles
dc.date.accessioned2018-03-16T20:24:35Z
dc.date.available2018-03-16T20:24:35Z
dc.date.issued03/10/2014
dc.identifierhttp://journals.sagepub.com/doi/abs/10.4137/ASWR.S12841
dc.identifier.issn11786221
dc.identifier.urihttp://ridda2.utp.ac.pa/handle/123456789/4424
dc.descriptionEmission of greenhouse gases, including nitrous oxide (N2O), from open beef cattle feedlots is becoming an environmental concern; however, research measuring emission rates of N2O from open beef cattle feedlots has been limited. This study was conducted to quantify N2O emission fluxes as affected by pen surface conditions, in a commercial beef cattle feedlot in the state of Kansas, USA, from July 2010 through September 2011. The measurement period represented typical feedlot conditions, with air temperatures ranging from -24 to 39°C. Static flux chambers were used to collect gas samples from pen surfaces at 0, 15, and 30 minutes. Gas samples were analyzed with a gas chromatograph and from the measured concentrations, fluxes were calculated. Median emission flux from the moist/muddy surface condition was 2.03 mg m−2 hour−1, which was about 20 times larger than the N2O fluxes from the other pen surface conditions. In addition, N2O peaks from the moist/muddy pen surface condition were six times larger than emission peaks previously reported for agricultural soils.en_US
dc.description.abstractEmission of greenhouse gases, including nitrous oxide (N2O), from open beef cattle feedlots is becoming an environmental concern; however, research measuring emission rates of N2O from open beef cattle feedlots has been limited. This study was conducted to quantify N2O emission fluxes as affected by pen surface conditions, in a commercial beef cattle feedlot in the state of Kansas, USA, from July 2010 through September 2011. The measurement period represented typical feedlot conditions, with air temperatures ranging from -24 to 39°C. Static flux chambers were used to collect gas samples from pen surfaces at 0, 15, and 30 minutes. Gas samples were analyzed with a gas chromatograph and from the measured concentrations, fluxes were calculated. Median emission flux from the moist/muddy surface condition was 2.03 mg m−2 hour−1, which was about 20 times larger than the N2O fluxes from the other pen surface conditions. In addition, N2O peaks from the moist/muddy pen surface condition were six times larger than emission peaks previously reported for agricultural soils.en_US
dc.language.isoenen_US
dc.rightshttp://www.creativecommons.org/licenses/by-nc/3.0/
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectfeedlot surface emissionsen_US
dc.subjectgreenhouse gasesen_US
dc.subjectnitrous oxide fluxen_US
dc.subjectstatic flux chambersen_US
dc.titleNitrous Oxide Fluxes from a Commercial Beef Cattle Feedlot in Kansasen_US
dc.typeinfo:eu-repo/semantics/articleen_US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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