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Nitrous Oxide Fluxes from a Commercial Beef Cattle Feedlot in Kansas

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Date
2014-03-10
2014-03-10
Author
A. Aguilar, Orlando
Maghirang, Ronaldo
W. Rice, Charles
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Abstract
Emission 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.
URL
http://journals.sagepub.com/doi/abs/10.4137/ASWR.S12841
URI
http://ridda2.utp.ac.pa/handle/123456789/4424
http://ridda2.utp.ac.pa/handle/123456789/4424
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  • Facultad de Ingeniería Mecánica [42]
License
https://creativecommons.org/licenses/by-nc-sa/4.0/
info:eu-repo/semantics/openAccess

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