Effects of rotating antibiotic and ionophore feed additives on volatile fatty acid production, potential for methane production, and microbial populations of steers consuming a moderate-forage diet

2017 ◽  
Vol 95 (10) ◽  
pp. 4554-4567 ◽  
Author(s):  
W. L. Crossland ◽  
L. O. Tedeschi ◽  
T. R. Callaway ◽  
M. D. Miller ◽  
W. B. Smith ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Methane Production ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Feed Additives ◽  
Microbial Populations ◽  
Production Potential ◽  
Fatty Acid Production

scholarly journals Effect of the macroalgaeAsparagopsis taxiformison methane production and the rumen microbiome assemblage

2018 ◽  
Author(s):  
Breanna Michelle Roque ◽  
Charles Garrett Brooke ◽  
Joshua Ladau ◽  
Tamsen Polley ◽  
Lyndsey Marsh ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Dairy Cattle ◽  
Methane Production ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fatty Acid Production ◽  
Rhodes Grass ◽  
Rumen Microbiome ◽  
Holistic Understanding ◽  
The Us

ABSTRACTBackgroundRecent studies using batch-fermentation suggest that the red macroalgaeAsparagopsis taxiformismight reduce methane (CH4) emission from beef cattle by up to ~99% when added to rhodes grass hay, a common feed in the Australian beef industry. These experiments have shown significant reductions in methane without compromising other fermentation parameters (i.e. volatile fatty acid production) withA. taxiformisorganic matter (OM) inclusion rates of up to 5%. In the study presented here,A. taxiformiswas evaluated for its ability to reduce methane production from dairy cattle fed a mixed ration widely utilized in California; the largest milk producer in the US.ResultsFermentation in a semi-continuousin-vitrorumen system suggests thatA. taxiformiscan reduce methane production from enteric fermentation in dairy cattle by 95% when added at a 5% OM inclusion rate without any obvious negative impacts on volatile fatty acid production. High-throughput 16S ribosomal RNA (rRNA) gene amplicon sequencing showed that seaweed amendment effects rumen microbiome communities consistent with the Anna Karenina hypothesis, with increased beta-diversity, over time scales of approximately three days. The relative abundance of methanogens in the fermentation vessels amended withA. taxiformisdecreased significantly compared to control vessels, but this reduction in methanogen abundance was only significant when averaged over the course of the experiment. Alternatively, significant reductions of methane in theA. taxiformisamended vessels was measured in the early stages of the experiment. This suggests thatA. taxiformishas an immediate effect on the metabolic functionality of rumen methanogens whereas its impact on microbiome assemblage, specifically methanogen abundance, is delayed.ConclusionsThe methane reducing effect ofA. taxiformisduring rumen fermentation makes this macroalgae a promising candidate as a biotic methane mitigation strategy in the largest milk producing state in the US. But its effectin-vivo(i.e. in dairy cattle) remains to be investigated in animal trials. Furthermore, to obtain a holistic understanding of the biochemistry responsible for the significant reduction of methane, gene expression profiles of the rumen microbiome and the host animal are warranted.

scholarly journals Influences of Feed Additives on in vitro Volatile Fatty Acid Production

2015 ◽  
Vol 10 (1) ◽  
pp. 36-42
Author(s):  
A. V. Duncan ◽  
A. Woldeghebriel ◽  
C. Privott ◽  
J. Carver ◽  
B. Holmes ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Feed Additives ◽  
Fatty Acid Production

A Techno-Economic case for Volatile Fatty Acid Production for Increased Sustainability in the Wastewater Treatment Industry

2021 ◽  
Author(s):  
Ganesh K Veluswamy ◽  
Andy Ball ◽  
Richard Dinsdale ◽  
Alan Guwy ◽  
Kalpit Shah
Keyword(s):  
Wastewater Treatment ◽  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fugitive Emissions ◽  
Fatty Acid Production

Methane, the final product of methanogenesis during anaerobic digestion is a low value product (0.1$/m3). Concerns over fugitive emissions from methane coupled with recent reduction in costs of solar and...

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