scholarly journals Nitrous oxide emissions from the urine of beef cattle as regulated by dietary crude protein and gallic acid1

2018 ◽  
Vol 96 (9) ◽  
pp. 3699-3711 ◽  
Author(s):  
Yu Bao ◽  
Ke Zhou ◽  
Guangyong Zhao
Keyword(s):  
Nitrous Oxide ◽  
Beef Cattle ◽  
Crude Protein ◽  
Nitrous Oxide Emissions ◽  
Dietary Crude Protein

scholarly journals Effect of dietary crude protein modification on ammonia and nitrous oxide concentration on a tie-stall dairy barn floor

2010 ◽  
Vol 93 (7) ◽  
pp. 3158-3165 ◽  
Author(s):  
H. Arriaga ◽  
G. Salcedo ◽  
L. Martínez-Suller ◽  
S. Calsamiglia ◽  
P. Merino
Keyword(s):  
Nitrous Oxide ◽  
Crude Protein ◽  
Protein Modification ◽  
Dietary Crude Protein ◽  
Oxide Concentration ◽  
Nitrous Oxide Concentration

Toward Modeling of Nitrous Oxide Emissions Following Precipitation, Urine, and Feces Deposition on Beef Cattle Feedyard Surfaces

2020 ◽  
Vol 63 (5) ◽  
pp. 1371-1384
Author(s):  
David B. Parker ◽  
Kenneth D. Casey ◽  
Kristin E. Hales ◽  
Heidi M. Waldrip ◽  
Byeng Min ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Beef Cattle ◽  
Greenhouse Gas ◽  
Empirical Modeling ◽  
Nitrous Oxide Emissions ◽  
N2o Emissions ◽  
List Type ◽  
Equivalent Mass ◽  
Fresh Feces ◽  
Feces Deposition

HighlightsNitrous oxide is a greenhouse gas emitted from feedyard pen surfaces.Experiments were conducted to quantify nitrous oxide emissions from precipitation, urine, and feces.Nitrous oxide emissions from urine were about 30% of those from equal amounts of precipitation.Regression equations were developed for empirical modeling of emissions.Abstract. The amount of moisture deposited annually as urine (~320 mm) and feces (~95 mm) on typical semi-arid Texas beef cattle feedyard pens is considerable compared to the regional 470 mm mean annual precipitation. Precipitation is a primary factor affecting nitrous oxide (N2O) emissions from manure, but specific effects of urine and feces deposition are unknown. The objectives of this research were to (1) quantify N2O emissions following precipitation, urine, and feces deposition on a dry feedyard manure surface, and (2) develop equations for future empirical modeling of these emissions. Four experiments (Exp.) were conducted using recirculating flux chambers to quantify N2O emissions. Exp. 1 had treatments (TRT) of water (W), artificial urine (AU), and two urines collected from beef cattle fed high-quality forage (FU) or corn-based concentrate (CU). Exp. 2 had TRT of W, AU, and two feces levels (Fx1 and Fx2). In Exp. 3, N2O emissions were quantified from fresh feces pats. In Exp. 4, the effect of rainfall pH on N2O emissions was evaluated. Results from Exp. 1 showed that the W TRT had the highest mean cumulative N2O emission, while AU, FU, and CU ranged from 31.0% to 70.0% of W on an equal volume-applied basis. There was little correlation between N2O emissions and urine or water nitrogen (N) content. In Exp. 2, W again had the highest cumulative N2O. Cumulative N2O emissions expressed per unit of water added were 29.0, 3.8, 4.5, and 5.1 mg N kg-1 water added for W, AU, Fx1, and Fx2, respectively. In Exp. 3, fresh feces pats emitted no direct N2O, but N2O originated from the dry manure beneath the feces pat due to wetting. In Exp. 4, the highest N2O emissions occurred at pH 5 and pH 8, with lower emissions at pH 6 and pH 7. This research has shown that the addition of moisture to the pen surface from urine and feces contributes considerably to N2O emissions as compared to precipitation alone. The following recommendations were developed for future empirical modeling purposes: (1) N2O emissions from urine should be calculated as 32.7% of those emissions from the equivalent mass deposition of water, and (2) N2O emissions resulting from the mass of water in feces should be calculated as 15.6% of those emissions from the equivalent mass deposition of water. Keywords: Beef cattle, Greenhouse gas, Manure, Nitrous oxide, Urine, Precipitation.

Effect of Dietary Crude Protein on Ammonia Emissions From Open-Lot Beef Cattle Feedyards

2003 ◽  
Author(s):  
Syamalakumar Pandrangi ◽  
David B. Parker ◽  
L. Wayne Greene ◽  
Lal K. Almas ◽  
Marty B. Rhoades ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Crude Protein ◽  
Ammonia Emissions ◽  
Dietary Crude Protein

<i>Empirical Model of Annual Nitrous Oxide Emissions from Open-Lot Beef Cattle Feedyard Pens (Version 2)</i>

2019 ◽  
Author(s):  
David B. Parker ◽  
Kenneth D. Casey ◽  
Erin L. Cortus ◽  
Byeng R. Min ◽  
Heidi M. Waldrip ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Beef Cattle ◽  
Empirical Model ◽  
Nitrous Oxide Emissions

Nitrapyrin Reduced Nitrous Oxide Emissions from Beef Cattle Urine Patches on a Semiarid Tame Pasture

2017 ◽  
Vol 81 (6) ◽  
pp. 1537-1547 ◽  
Author(s):  
Ben W. Thomas ◽  
Xinlei Gao ◽  
Jessica L. Stoeckli ◽  
Ryan Beck ◽  
Kui Liu ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Beef Cattle ◽  
Nitrous Oxide Emissions
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