96-1 Greenhouse Gas Emissions from a Beef Cattle Feedlot.

See more from this Division: ASA Section: Environmental Quality
See more from this Session: Emissions from Livestock Production: I

Monday, November 16, 2015: 1:05 PM
Minneapolis Convention Center, M100 D

Mei Bai, The University of Melbourne, University of Melbourne, Richmond, VIC, AUSTRALIA, Thomas Flesch, Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada, Sean McGinn, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada and Deli Chen, School of Agriculture and Food, The University of Melbourne, Parkville, Victoria, Australia
Abstract:
Abstract

Beef cattle emit large amounts of the greenhouse gas (GHG) CH4 and N2O, as well as NH3 that contributes to N2O emission when deposited to land. A short-term campaign was conducted at a beef cattle feedlot in Victoria, Australia, to quantify CH4, N2O and NH3 emissions from the pens, manure stockpile and surface run-off pond. Open-path concentration sensors were used with an inverse-dispersion technique to estimate emissions. Daily average emissions of CH4, N2O and NH3 were 132, 0 and 117 g animal-1 d-1 from the cattle pens, and 22, 2 and 9 g animal-1 d-1 from the manure stockpile.  Emissions of CH4 and NH3 from the runoff pond were small. The CH4 yield from the cattle pens was 13 g kg-1 (dry matter intake basis; DMI), and the feedlot NH3-N emission was 48% of fed N. Extrapolating these results to the feedlot population of cattle across Australia would mean that feedlots contribute approximately 2% of the national feedlots emissions, with 75% of total GHG emissions from cattle pen.

See more from this Division: ASA Section: Environmental Quality
See more from this Session: Emissions from Livestock Production: I

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