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Ammonia And Hydrogen Sulfide Flux From Beef Cattle Pens: Implications For Air Quality Measurement Methodologies And Evaluation Of Emission Controls, Jacek A. Koziel, David B. Parker, Bok-Haeng Baek, Kevin J. Bush, Marty Rhoades, Zena Perschbacher-Buser
Ammonia And Hydrogen Sulfide Flux From Beef Cattle Pens: Implications For Air Quality Measurement Methodologies And Evaluation Of Emission Controls, Jacek A. Koziel, David B. Parker, Bok-Haeng Baek, Kevin J. Bush, Marty Rhoades, Zena Perschbacher-Buser
Jacek A. Koziel
Ammonia (NH 3 ) and hydrogen sulfide (H 2 S) are emitted from beef cattle feedlots with NH 3 being greater by nearly three orders of magnitude. Nearly 30% of the U.S. beef cattle are fed in the High Plains of Texas. Earlier research indicates that abatement technologies may be needed to significantly reduce NH 3 emissions. To date, little is known about the appropriate measurement methods to evaluate the effectiveness of NH 3 emission controls. In this research, we determined the (a) variability of NH 3 and H 2 S fluxes within a single pen and (b) the relationships …
Application Rate And Timing Effects On Urease Inhibitor Performance For Minimizing Ammonia Emissions From Beef Cattle Feedyards, David B. Parker, Syam Pandrangi, L. Wayne Greene, Lal K. Almas, N. Andy Cole, Marty B. Rhoades, Jacek A. Koziel
Application Rate And Timing Effects On Urease Inhibitor Performance For Minimizing Ammonia Emissions From Beef Cattle Feedyards, David B. Parker, Syam Pandrangi, L. Wayne Greene, Lal K. Almas, N. Andy Cole, Marty B. Rhoades, Jacek A. Koziel
Jacek A. Koziel
A laboratory study was conducted to evaluate how rate and timing of urease inhibitor application affects ammonia emissions from simulated beef cattle feedyard surfaces. The urease inhibitor N-(n-butyl)thiophosphoric triamide (NBPT) was applied at rates of 0, 1 and 2 kg/ha, at 8, 16, and 32 day frequencies, and with or without simulated rainfall. Synthetic urine was added every 2 days to the manure surface. Gaseous NH3 was trapped in a sulfuric acid solution using a vacuum system and analyzed for nitrogen using automated procedures. NBPT applied every 8 days was most effective, with the 1 and 2 kg/ha NBPT treatments …