Rapid Communication: Ranking dairy cows for methane emissions measured using respiration chamber or GreenFeed techniques during early, peak, and late lactation

2017 ◽  
Vol 95 (7) ◽  
pp. 3154
Author(s):  
J. Rischewski ◽  
A. Bielak ◽  
G. Nürnberg ◽  
M. Derno ◽  
B. Kuhla
Keyword(s):  
Dairy Cows ◽  
Methane Emissions ◽  
Respiration Chamber ◽  
Rapid Communication ◽  
Early Peak

scholarly journals Grape marc reduces methane emissions when fed to dairy cows

2014 ◽  
Vol 97 (8) ◽  
pp. 5073-5087 ◽  
Author(s):  
P.J. Moate ◽  
S.R.O. Williams ◽  
V.A. Torok ◽  
M.C. Hannah ◽  
B.E. Ribaux ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Methane Emissions ◽  
Grape Marc

79 Comparison of enteric methane emissions between Holstein heifers and steers using respiration chamber data

2021 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Xianjiang Chen ◽  
Christopher Reynolds ◽  
Les Crompton ◽  
Huiru Zheng ◽  
Haiying Wang ◽  
...  
Keyword(s):  
Methane Emissions ◽  
Respiration Chamber ◽  
Enteric Methane ◽  
Enteric Methane Emissions

scholarly journals PSII-17 Program Chair Poster Pick: Effect of ruminal protozoa on methane emissions in ruminants – a meta-analysis

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 397-398
Author(s):  
Xiaoxia Dai ◽  
Kenneth Kalscheur ◽  
Pekka Huhtanen ◽  
Antonio Faciola
Keyword(s):  
Dairy Cows ◽  
Meta Analysis ◽  
Random Effect ◽  
Negative Relationship ◽  
Small Ruminants ◽  
Methane Emissions ◽  
Mitigation Strategies ◽  
Positive Relationships ◽  
Ruminal Fermentation ◽  
The Relationship

Abstract The effects of ruminal protozoa (RP) concentration on methane emissions from ruminants were evaluated in a meta-analysis using 67 publications reporting data from 85 in vivo experiments. Experiments included in the database reported methane emissions (g/kg DMI) and RP (log10 cells/mL) from the same group of animals. Quantitative data including diet chemical composition, ruminal fermentation, total tract digestibility, and milk production; and qualitative information including methane mitigation strategies, animal type, and methane measurement methods were also collected. The studies were conducted in dairy cows (51%), beef steers (32%) and small ruminants (32%). 70% of the studies reported a reduction in methane emissions. Supplemental lipids reduced methane emissions 95% of the time. The relationship between methane emissions and RP concentration was evaluated as a random coefficient model with the experiment as a random effect and weighted by the inverse pooled SEM squared, including the possibility of covariance between the slope and the intercept. A quadratic effect of RP concentration on methane emissions was detected: CH4= -28.8 + 12.2 × RP-0.64 × RP2. To detect potential interfering factors in the relationship, the influence of several qualitative and quantitative factors were separately tested. Acetate, butyrate, and isobutyrate molar proportions had positive relationships with methane emissions and influenced the relationship between RP concentration and methane emissions, where the presence of ruminal fermentation variables reduced the effects of RP concentration in methane emissions. Total tract digestibility of DM, OM, and CP had negative relationships while NDF digestibility had a positive relationship with methane emissions; however, they only changed the magnitude of intercept and slope of RP and RP2 for the relationship. For dairy cows, milk fat and protein concentrations had positive relationships and milk yield had a negative relationship with methane emissions and changed the magnitude of intercept and slope of RP and RP2 for the relationship.

scholarly journals Milk metabolome reveals variations on enteric methane emissions from dairy cows fed a specific inhibitor of the methanogenesis pathway

2021 ◽  
Author(s):  
Bénédict Yanibada ◽  
Ulli Hohenester ◽  
Mélanie Pétéra ◽  
Cécile Canlet ◽  
Stéphanie Durand ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Specific Inhibitor ◽  
Methane Emissions ◽  
Enteric Methane ◽  
Enteric Methane Emissions

scholarly journals Replacement of Soybean Meal With Soybean Cake Reduces Methane Emissions in Dairy Cows and an Assessment of a Face-Mask Technique for Methane Measurement

2019 ◽  
Vol 6 ◽  
Author(s):  
Sylvia Rocha Silveira ◽  
Stephanie Amelia Terry ◽  
Tamara Elaine Biffin ◽  
Rogério Martins Maurício ◽  
Luiz Gustavo Ribeiro Pereira ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Soybean Meal ◽  
Face Mask ◽  
Methane Emissions ◽  
Soybean Cake ◽  
Methane Measurement
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