MANAGING FARMS FOR ENVIRONMENTAL STEWARDSHIP AND PROFIT
Location: Pasture Systems & Watershed Management Research
Title: Mass balance evaluation of alcohol emission from cattle feed
Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 7, 2011
Publication Date: August 28, 2011
Citation: Hafner, S.D., Montes, F., Rotz, C.A., Howard, C. 2011. Mass balance evaluation of alcohol emission from cattle feed [abstract]. American Chemical Society Abstracts. Paper No. 186.
Interpretive Summary: An interpretive summary is not required.
Silage on dairy farms has been recognized as an important source of volatile organic compounds (VOCs) to the atmosphere, and therefore a contributor to tropospheric ozone. Considering reactivity and likely emission rates, ethanol, 1-propanol, and acetaldehyde probably make the largest contribution to ozone formation. Accurate estimates of emission rates of these compounds are not available. Previous studies have measured VOC emission rates using flux chambers, which underestimate rates in the field, or wind tunnels, which may provide more accurate estimates. In this work we describe a mass balance approach for estimating VOC emission from cattle feed, and measurements of ethanol, 1-propanol, methanol, and acetaldehyde emission from corn silage on a dairy farm in Maryland, USA. We anticipate that our approach will provide more accurate estimates of emission rates and the effect of temperature and air flow on emission from silage under farm conditions.