Submitted to: American Society of Agricultural Engineers Meetings Papers
Publication Type: Abstract Only
Publication Acceptance Date: 6/2/2003
Publication Date: 7/27/2003
Citation: Pandrangi, S., Parker, D.B., Greene, L.W., Almas, L.K., Rhoades, M.B., Cole, N.A. Effect of Dietary Crude Protein on Ammonia Emissions from Open-lot Beef Cattle Feedyards. CD-ROM. Las Vegas, NV. American Society Of Agricultural Engineers Meetings Papers. 2003.
Technical Abstract: A laboratory study was performed to compare ammonia emissions from simulated feedlot surfaces. Beef cattle manure was collected from open lot pens at the USDA-ARS feedlot in Bushland, TX. Treatments within the pens consisted of two dietary crude protein concentrations (11.5 and 13%) and two protein sources (urea and cottonseed meal). Manure collected from the pens was placed into Tupperware® chambers in the laboratory. Chambers were sealed and ammonia was trapped in an acid solution for 15 days using a vacuum system. Results suggest that as the protein concentration in the diet increases, potential daily ammonia emissions increase. The source of crude protein had little effect on ammonia emissions.