Journal article
Non-interference measurement of CH4, N2O and NH3 emissions from cattle
M Bai, J Sun, KB Dassanayake, MA Benvenutti, J Hill, OT Denmead, T Flesch, D Chen
Animal Production Science | CSIRO PUBLISHING | Published : 2016
DOI: 10.1071/AN14992
Abstract
A technique combining open-path Fourier transform infrared spectroscopy with an inverse-dispersion model was used to quantify methane (CH4), nitrous oxide (N2O) and ammonia (NH3) emissions from an isolated cattle pen in south-eastern Australia. Twenty-eight Angus steers (1-year old, initial average liveweight 404 kg) were fed a 60% grain diet and kept in a pen (20 × 20 m) for 41 days. Gas concentrations were measured downwind of the pen using an open-path Fourier transform infrared spectroscopy with a path length of 100 m, having a detection sensitivity of 2, 0.3 and 0.4 ppb for CH4, N2O and NH3, respectively. Daily emission rates were 232, 14 and 192 g/cattle.day for CH4, N2O and NH3, respe..
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Funding Acknowledgements
We thank Meat and Livestock Australia and the Livestock Methane Research Cluster for financial support. We acknowledge all staff at Dookie campus for providing materials and technical support on site. We thank Trevor Coates for assisting in processing data. We acknowledge Dr Michael C. Thomas, Dr Shu Kee Lam, and Dr Sean M. McGinn for comments and discussions on this manuscript.