Effects of dietary crude protein and tannic acid on nitrogen excretion, urinary nitrogenous composition and urine nitrous oxide emissions in beef cattle

2019 ◽  
Vol 103 (6) ◽  
pp. 1675-1683 ◽  
Author(s):  
Ke Zhou ◽  
Yu Bao ◽  
Guangyong Zhao
Keyword(s):  
Nitrous Oxide ◽  
Beef Cattle ◽  
Tannic Acid ◽  
Crude Protein ◽  
Nitrogen Excretion ◽  
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

scholarly journals Effects of Decreasing Dietary Crude Protein Level on Growth Performance, Nutrient Digestion, Serum Metabolites, and Nitrogen Utilization in Growing Goat Kids (Capra. hircus)

Animals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 151 ◽  
Author(s):  
Wen Zhu ◽  
Wei Xu ◽  
Congcong Wei ◽  
Zijun Zhang ◽  
Chunchao Jiang ◽  
...  
Keyword(s):  
Growth Performance ◽  
Crude Protein ◽  
Dry Matter ◽  
Nitrogen Utilization ◽  
Nitrogen Excretion ◽  
Capra Hircus ◽  
Serum Metabolites ◽  
Dietary Crude Protein ◽  
Nutrient Digestion ◽  
Nitrogen Intake

The effects of decreasing dietary crude protein (CP) level on growth performance, nutrient digestion, serum metabolites, and nitrogen utilization in growing goat kids were investigated in the current study. Thirty-six male Anhui white goat kids were randomly assigned to one of three CP content diets: 14.8% (control), 13.4%, and 12.0% of dry matter, respectively. Diets were isoenergetic. The experiment lasted for 14 weeks, with the first two weeks being for adaptation. Results showed that the low-CP diet decreased average daily gain, feed efficiency, digestibility of dry matter, organic matter, crude protein, and fiber. No significant changes were observed in dry-matter intake. With a decrease in dietary CP level, fecal nitrogen excretion (% of nitrogen intake) increased linearly, whereas CP intake, blood urea nitrogen, urinary nitrogen excretion (% of nitrogen intake), and total nitrogen excretion (% of nitrogen intake) decreased. Serum glucose concentration decreased, while concentrations of low-density lipoproteins and non-esterified fatty acids increased with the low-CP diet. In conclusion, decreasing the dietary CP level decreased goats’ nitrogen excretion, but with restrictive effects on growth performance. A diet containing 13.4% CP is optimal for reducing nitrogen excretion without any adverse effect on growth performance of Anhui white goat kids. This concentration is 1.4% points lower than the NRC recommendations and thus is also environmentally beneficial on the input side because it decreases the use of feed (soy) protein.

Pinpointing the lowest protein diet for young male broilers

2003 ◽  
Vol 2003 ◽  
pp. 177-177
Author(s):  
B. Dastar ◽  
A. Golian
Keyword(s):  
Dietary Protein ◽  
Crude Protein ◽  
Broiler Chicken ◽  
Young Male ◽  
Nitrogen Excretion ◽  
Broiler Performance ◽  
Dietary Protein Level ◽  
Dietary Crude Protein ◽  
Indispensable Amino Acids ◽  
Per Se

Protein is one of the most expensive portion of a broiler chicken diet. Overfeeding of protein may reduce broiler production profit as well as polluting soil through extra nitrogen excretion. Many attempts have been made to reduce dietary crude protein (CP) level with no adverse effect on broiler performance, as a result protein per se is no longer a requirement for growing chicken. Controversial results have been published with regard to lowering dietary CP level. The purpose of these studies was to pinpoint out the lowest possible dietary protein level when supplemental indispensable amino acids are maintained in a practical corn-soy diet.

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
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