Effects of oral nitroethane administration on enteric methane emissions and ruminal fermentation in cattle

Brown, Erin G.; Anderson, Robin C.; Carstens, G. E.; Bañuelos, Héctor Gutiérrez; McReynolds, J. L.; Slay, Lisa J.; Callaway, Todd R.; Nisbet, David J.

doi:10.1016/j.anifeedsci.2011.04.017

Cited by 33 publications

(24 citation statements)

References 26 publications

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“…Studies by Anderson and colleagues have shown that short-chain nitro-compounds such as nitroethane, 2 nitroethanol, 2-nitro-1-propanol and 3-nitro-1-propionic acid, dimethyl-2-nitroglutarate and 2-nitro-methyl-propionate inhibit ruminal CH 4 production in vitro (for references, see Anderson et al 2010) and nitroethane and 2-nitro-1-propanol have been shown to reduce CH 4 -producing activity in vivo (Anderson et al 2006;GutierrezBañuelos et al 2007;Brown et al 2011). These nitrocompounds inhibit both CH 4 and formate synthesis (Anderson et al 2008).…”

Section: Inhibition Of Methanogenesis With Short-chain Nitrocompoundsmentioning

confidence: 99%

“…Inhibition of methanogenesis is accompanied by increased formate production when BCM (a coenzyme M inhibitor) and other CH 4 analogues are incubated with methanogens or complex consortia of methanogens Bleicher and Winter 1994). In contrast to the majority of inhibitors, these nitro-compounds do not bring about marked changes in the molar proportions of VFA produced by the mixed microbial population (Bleicher and Winter 1994;Anderson et al 2003;Brown et al 2011). Any H 2 released by reversal of cofactor reduction does not yet have an identified sink other than that attributable to reduction of the nitrocompound itself, and on the basis of stoichiometry, this could account for only a small fraction of the H 2 removed (Božic et al 2009).…”

Section: Inhibition Of Methanogenesis With Short-chain Nitrocompoundsmentioning

confidence: 99%

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Interactions between microbial consortia in biofilms: a paradigm shift in rumen microbial ecology and enteric methane mitigation

Leng¹

2014

Anim. Prod. Sci.

140

105

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Abstract. Minimising enteric CH 4 emissions from ruminants is a current research priority because CH 4 contributes to global warming. The most effective mitigation strategy is to adjust the animal's diet to complement locally available feed resources so that optimal production is gained from a minimum of animals. This essay concentrates on a second strategy -the use of feed additives that are toxic to methanogens or that redirect H 2 (and electrons) to inhibit enteric CH 4 emissions from individual animals. Much of the published research in this area is contradictory and may be explained when the microbial ecology of the rumen is considered.Rumen microbes mostly exist in organised consortia within biofilms composed of self-secreted extracellular polymeric substances attached to or within feed particles. In these biofilms, individual colonies are positioned to optimise their use of preferred intermediates from an overall process of organic matter fermentation that generates end-products the animal can utilise. Synthesis of CH 4 within biofilms prevents a rise in the partial pressure of H 2 (pH 2 ) to levels that inhibit bacterial dehydrogenases, and so reduce fermentation rate, feed intake and digestibility. In this context, hypotheses are advanced to explain changes in hydrogen disposal from the biofilms in the rumen resulting from use of anti-methanogenic feed additives as follows.Nitrate acts as an alternative electron sink when it is reduced via NO 2 -to NH 3 and CH 4 synthesis is reduced. However, efficiency of CH 4 mitigation is always lower than that predicted and decreases as NO 3 -ingestion increases. Suggested reasons include (1) variable levels of absorption of NO 3 -or NO 2 -from the rumen and (2) increases in H 2 production. One suggestion is that NO 3 -reduction may lower pH 2 at the surface of biofilms, thereby creating an ecological niche for growth of syntrophic bacteria that oxidise propionate and/or butyrate to acetate with release of H 2 .Chlorinated hydrocarbons also inhibit CH 4 synthesis and increase H 2 and formate production by some rumen methanogens. Formate diffuses from the biofilm and is converted to HCO 3 -and H 2 in rumen fluid and is then excreted via the breath. Short-chain nitro-compounds inhibit both CH 4 and formate synthesis when added to ruminal fluid but have little or no effect in redirecting H 2 to other sinks, so the pH 2 within biofilms may increase to levels that support reductive acetogenesis. Biochar or activated charcoal may also alter biofilm activity and reduce net CH 4 synthesis; direct electron transfer between microbes within biofilms may also be involved. A final suggestion is that, during their sessile life stage, protozoa interact with biofilm communities and help maintain pH 2 in the biofilm, supporting methanogenesis.

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Section: Inhibition Of Methanogenesis With Short-chain Nitrocompoundsmentioning

confidence: 99%

Section: Inhibition Of Methanogenesis With Short-chain Nitrocompoundsmentioning

confidence: 99%

Interactions between microbial consortia in biofilms: a paradigm shift in rumen microbial ecology and enteric methane mitigation

Leng¹

2014

Anim. Prod. Sci.

140

105

View full text Add to dashboard Cite

show abstract

“…These less toxic nitro compounds may have the potential to be used as an alternative to decrease CH 4 production in ruminants (Gutierrez-Banuelos et al 2007 ;Brown et al 2011 ). These less toxic nitro compounds may have the potential to be used as an alternative to decrease CH 4 production in ruminants (Gutierrez-Banuelos et al 2007 ;Brown et al 2011 ).…”

Section: Nitro Compoundsmentioning

confidence: 99%

Climate Change Impact on Livestock: Adaptation and Mitigation

Sejian¹,

Gaughan²,

Baumgard³

et al. 2015

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“…These less toxic nitro compounds may have the potential to be used as an alternative to decrease CH 4 production in ruminants (Gutierrez-Banuelos et al 2007 ;Brown et al 2011 ). In the presence of the appropriate nitro compound, formate, lactate and H 2 served as electron donors of D. detoxifi cans .…”

Section: Nitro Compoundsmentioning

confidence: 99%

Overview on Adaptation, Mitigation and Amelioration Strategies to Improve Livestock Production Under the Changing Climatic Scenario

Sejian

Samal

Haque

et al. 2015

Climate Change Impact on Livestock: Adaptation and Mitigation

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Livestock production is thought to be adversely affected by detrimental effects of extreme climatic conditions. Consequently, adaptation, mitigation and amelioration of detrimental effects of extreme climates have played a major role in combating the climatic impact in livestock production. While measures to reduce the growth of greenhouse gas emissions are an important response to the threat of climate change, adaptation to climate change will also form a necessary part of the response. The salient adaptation strategies are developing less sensitive breeds, improving water availability, improving animal health, promoting women empowerment, developing various policy issues, establishing early warning systems and developing suitable capacity building programmes for different stakeholders. Developing adaptation strategies is therefore an important part of ensuring that countries are

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Effects of oral nitroethane administration on enteric methane emissions and ruminal fermentation in cattle

Cited by 33 publications

References 26 publications

Interactions between microbial consortia in biofilms: a paradigm shift in rumen microbial ecology and enteric methane mitigation

Interactions between microbial consortia in biofilms: a paradigm shift in rumen microbial ecology and enteric methane mitigation

Climate Change Impact on Livestock: Adaptation and Mitigation

Overview on Adaptation, Mitigation and Amelioration Strategies to Improve Livestock Production Under the Changing Climatic Scenario

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