Journal ArticleDOI
Factors affecting rumen methanogens and methane mitigation strategies
Sanjay Kumar,Anil Kumar Puniya,Monica Puniya,Sumit Singh Dagar,Sunil Kumar Sirohi,Kishan Singh,Gareth W. Griffith +6 more
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TLDR
The present article aimed to cover comprehensively the different aspects of rumen methanogenesis such as the phylogeny of methanogens, their microbial ecology, factors affecting methane emission, mitigation strategies and need for further study.Abstract:
The rumen is a highly diverse ecosystem comprising different microbial groups including methanogens that consume a considerable part of the ruminant’s nutrient energy in methane production. The consequences of methanogenesis in the rumen may result in the low productivity and possibly will have a negative impact on the sustainability of the ruminant’s production. Since enteric fermentation emission is one of the major sources of methane and is influenced by a number of environmental factors, diet being the most significant one, a number of in vitro and in vivo trials have been conducted with different feed supplements (halogenated methane analogues, bacteriocins, propionate enhancers, acetogens, fats etc.) for mitigating methane emissions directly or indirectly, yet extensive research is required before reaching a realistic solution. Keeping this in view, the present article aimed to cover comprehensively the different aspects of rumen methanogenesis such as the phylogeny of methanogens, their microbial ecology, factors affecting methane emission, mitigation strategies and need for further study.read more
Citations
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Journal ArticleDOI
Methanogens: methane producers of the rumen and mitigation strategies.
TL;DR: The methanogens identified in the rumens of cattle and sheep, as well as a number of methane mitigation strategies that have been effective in vivo are described.
Journal ArticleDOI
Critical evaluation of essential oils as rumen modifiers in ruminant nutrition: A review
TL;DR: Essential oils appeared to be very promising compounds as they selectively reduced methane production and protein breakdown in both in vitro and in vivo studies, but in some studies, the use of EO as feed additives was accompanied with decreased feed degradability and lowered volatile fatty acid.
BookDOI
Rumen microbiology : from evolution to revolution
TL;DR: This work focuses on the exploration and exploitation of rumen microbes, an underutilized niche for industrially important enzymes in a non-ruminant gut, and the implications for ruminant health and welfare.
Journal ArticleDOI
New aspects and strategies for methane mitigation from ruminants
Sanjay Kumar,Sanjay Kumar,Prasanta Kumar Choudhury,María Dolores Carro,Gareth W. Griffith,Sumit Singh Dagar,Monica Puniya,Serena Calabro,S. R. Ravella,Tejpal Dhewa,Ramesh C. Upadhyay,Sunil Kumar Sirohi,Shivlal Singh Kundu,Metha Wanapat,Anil Kumar Puniya +14 more
TL;DR: The construction of a methanogenic gene catalogue through these approaches will lead to understand the microbiome function, its relation with the host and feeds, and therefore, will form the basis of practically viable and eco-friendly methane mitigation approaches, while improving the ruminant productivity.
Journal ArticleDOI
Associative patterns among anaerobic fungi, methanogenic archaea, and bacterial communities in response to changes in diet and age in the rumen of dairy cows.
TL;DR: Co-occurrence analysis incorporating taxa from bacteria, ARF and archaea revealed syntrophic interactions both within and between microbial domains in response to change in diet as well as age of dairy cows, supporting the hypothesis that the rumen microbiome also matures with age to sustain the growing metabolic needs of the host.
References
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Journal ArticleDOI
Establishment and Development of Ruminal Hydrogenotrophs in Methanogen-Free Lambs
TL;DR: Findings provide the first evidence from animal studies that reductive acetogens can sustain a functional rumen and replace methanogens as a sink for H2 in the rumen.
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Two genetically distinct methyl-coenzyme M reductases in Methanobacterium thermoautotrophicum strain Marburg and ΔH
TL;DR: A second methyl-coenzyme M reductase (MCR II) is discovered in the two strains of Methanobacterium thermoautotrophicum strain Marburg and delta H, which grow on H2 and CO2 as energy source.
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Effect of refined soy oil or whole soybeans on intake, methane output, and performance of young bulls.
TL;DR: The inclusion level of WSB in the current experiment (27%) was beyond the palatability threshold of the bulls used and resulted in a marked decline in intake and performance, suggesting WSB may have a role to play in ruminant diets, but only at a reduced inclusion rate.
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Effect of supplementing myristic acid in dairy cow rations on ruminal methanogenesis and fatty acid profile in milk.
TL;DR: It is suggested that MA could be used to inhibit the activities of methanogens in ruminant animals without altering the conjugated linoleic acid and trans-18:1 fatty acid profile in milk.
Journal ArticleDOI
Fate and effect of quaternary ammonium compounds on a mixed methanogenic culture
TL;DR: Methanogens were inhibited when the total QAC concentration reached 30 mg/L and volatile fatty acids (VFAs) accumulated, however, methane production recovered in 57 days of incubation, and all VFAs were consumed, suggesting that a prolonged incubation period is necessary for the methanogens to overcome the transient inhibition at a relatively low QAC concentrations.