Feed additives and other interventions for decreasing methane emissions

Nevel, Christian Van; Demeyer, Daniël

doi:10.1002/9783527615353.ch17

Cited by 63 publications

(57 citation statements)

References 114 publications

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“…The addition of HMA and PMDI to both feeds caused a reduction in methane output and in the proportion of acetic acid, and an increase in the proportions of propionic and butyric acids and hydrogen output, agreeing with observations reported for BES and BCM by Van Nevel and Demeyer (1995) and Goel et al (2009), respectively. HMAs caused a decrease in methane output through changes in the direction of fermentation rather than in the extent of fermentation, whereas PMDI appeared to decrease methane output through a combined effect on the extent and direction of fermentation.…”

Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidesupporting

confidence: 80%

“…Although not a HMA, in other reports (Van Nevel and Demeyer 1995;Choi et al 2004) PMDI has been grouped with HMA, primarily because it is thought to share a similar action as BES to inhibit methanogenesis (Martin and Macy 1985). PMDI adversely affected the in vitro fermentation of both feeds to a greater extent than did BES or BCM, as evidenced by the lower aDMd for ryegrass and a lower tVFA/ DMi for both feeds with PMDI.…”

Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidementioning

confidence: 99%

“…A gradual decrease in methane output was observed with an increasing concentration of BES (1-40 mM), whereas methane output was not detectable at a BCM concentration of !5 mM. If there is a connection between this observation and the known persistency of BCM as an inhibitor of methane emissions, as shown in vivo (McCrabb et al 1997), as compared with a lack of persistency observed for BES (Van Nevel and Demeyer 1995), the development of future inhibitors of enteric methanogenesis would warrant closer attention to the mode of action of BCM. The extent of reduction in methane output with increasing concentration of BES was more pronounced for GS+B than for ryegrass.…”

Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidementioning

confidence: 99%

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Reducing in vitro rumen methanogenesis for two contrasting diets using a series of inclusion rates of different additives

et al. 2014

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Abstract. Eleven individual additives were incubated with either perennial ryegrass or with grass silage+barley grain (50 : 50) and the in vitro methane output was assessed using the gas production technique (GPT). Additives were: fatty acids (lauric, oleic, linoleic and linolenic acids), halogenated methane analogues (bromoethanesulfonate and bromochloromethane), pyromellitic diimide, statins (mevastatin and lovastatin), a probiotic (Saccharomyces cerevisiae) and an unsaturated dicarboxylic acid (fumaric acid). Each additive was included at a range of concentrations. Effects on methane output per gram of feed dry matter (DM) incubated (CH 4 /DMi) and disappeared (CH 4 /DMd), as well as other fermentation variables, were evaluated after 24 h of incubation. The addition of increased concentrations of individual fatty acids, bromoethanesulfonate and pyromellitic diimide caused a dose-dependent decline in methane output (CH 4 /DMi, CH 4 / DMd), when incubated with either perennial ryegrass or grass silage+barley grain. No methane output was detected for either feed with the addition of !5 mM bromochloromethane. The statins were ineffective inhibitors of methane output regardless of feed type. For perennial ryegrass, S. cerevisiae caused a dose-dependent decline in CH 4 /DMd and fumaric acid a dose-dependent decline in CH 4 /DMi and CH 4 /DMd. The effectiveness of lauric, oleic, linoleic and linolenic acids and bromoethanesulfonate to reduce methane output was more pronounced when incubated with grass silage+barley grain than with perennial ryegrass, and therefore the type of feed is an important component for any future in vitro and in vivo studies to be undertaken with these additives. Thus, incorporating different feed types in the initial in vitro screening protocols of all new additives is recommended.Additional keywords: in vitro total gas production technique, rumen fermentation modifiers, ruminant diets.

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Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidesupporting

confidence: 80%

Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidementioning

confidence: 99%

Section: Halogenated Methane Analogues (Hma) and Pyromellitic Diimidementioning

confidence: 99%

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Reducing in vitro rumen methanogenesis for two contrasting diets using a series of inclusion rates of different additives

et al. 2014

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“…Since reductive acetogens are hydrogen consumers, in the anaerobic environment of rumen and hindgut they are in direct competition with the hydrogenothrophic methanogens which utilise 4 moles H, to reduce 1 mole CO, into 1 mole CH, (Miller and Wolin, 1986;Van Nevel and Demeyer, 1995). Indeed, a n inverse relation between bacterial numbers responsible for RA and M has been observed i n termite caeca (Brauman et al, 1992) and human and r a t faecal material (Lajoie et al, 1988;Gibson et al, 1990), although RA and M can occur simultaneously De Graeve et al, 1990).…”

Section: A3 Competition and Similarity Between M And Ramentioning

confidence: 99%

“…A variety of interventions to reduce methane production, including RA, were studied and reviewed by Van Nevel and Demeyer (1995). Replacing rumen M by RA would lead to a n additional third benefit: the production of a n energy rich compound (acetate) from CO, (Nollet e f al., 1997a).…”

Section: B4 the Presence Of Fermentable Substratesmentioning

confidence: 99%

Reductive Acetogenesis in the Hindgut and Attempts to its Induction in the Rumen—A Review

Fievez

Piattoni

Mbanzamihigo

et al. 1999

Journal of Applied Animal Research

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Fievez, V., Piattoni, F., Mbanzamihigo, L. and Demeyer, D. 1999. Reductive acetogenesis in the hindgut and attempts to its induction in the rumen-A review. J. Appl. Anim. Res., 16: 1-22. Hiridgut ferrneiitatiori differs froin ruinen fermentation b. y a. lower methane production and the presence of reductive acetogenesis (RA).Moreover, it has been showii tha.t with ageing RA is rephced coinpletely (ruinen) or partially (hindgut) A. IntroductionBesides methanogenesis (M), non assimilatory sulphate reduction and/ or reductive acetogenesis (RA) have been identified as major pathways of microbial competition for metabolic hydrogen, formed during bacterial fermentation in anaerobic microbial ecosystems. However, these alternative hydrogen sinks to M do not function in the rumen, although bacteria able to use them have been isolated . After a short introduction to the characteristics of RA, this paper intends to give a global review of the research carried out in our laboratory over the past five years, related both to the relative importance of RA and M and to the possibilities for induction of RA in the rumen. A.1. RA in the gastro-intestinal tractBacteria are defined as reductive acetogens when they are able to reduce 2 moles of CO, to 1 mole of acetate, either autotrophically or heterotrophically, e.g. homoacetogenesis (Fisher et al., 1932; Wieringa, 1936, Prins andLankhorst, 1977).The heterotrophic growth of hom,oacetogens is characterised by the (almost) complete conversion of monosaccharides to acetate (Ljungdahl, 1986 Moreover, most of the hoinoacetogens are able to reduce exogenous CO,> autotrophically with molecular H,: 2 CO, + 4H, 3 CH,COOH + 2HiO ( 3 ) . This ability of mixothrophic growth (i.e. autotrophically on CO,-H, --a n d heterotrophically on monosaccharides) enables these acetogens to survive in almost every anaerobic environment and could explain their rather high growth yields (Ljungdahl, 1986). A.2. Detection of the occurrence of RAThe amounts of end products formed in ruinen fermentation are related through the stoichiometery of the overall reaction concerned (Wolin, 1960). This allows calculation of the net amounts of "metabolic hydrogen" produced and recovered in reduced end products. The agreement of the amounts of end products formed within a fermentation, with the overall reactions proposed, can then be evaluated by calculation of a "hydrogen recovery (2Hr)" (Marty and Demeyer, 1973): 100 * (2P + 2B + 4CHJ / (2A + P + 4B), with A, P, B and CH, equal to the molar amounts of acetate, propionate, butyrate and methane, respectively.With rumen contents such recoveries range between 80 and 90% (Demeyer, 1991), whereas with hindgut contents from different species, values were much lower, suggesting the presence of other hydrogen consuming reactions, mainly RA (Henderson a n d Deineyer and De Graeve, 1991). However, this calculation does not allow to differentiate reaction (2) from (3) and, therefore, in this paper RA is used for both reactions. A.3. Competition and similarity betwee...

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Climate Change Impact on Livestock: Adaptation and Mitigation

Sejian¹,

Gaughan²,

Baumgard³

et al. 2015

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Feed additives and other interventions for decreasing methane emissions

Cited by 63 publications

References 114 publications

Reducing in vitro rumen methanogenesis for two contrasting diets using a series of inclusion rates of different additives

Reducing in vitro rumen methanogenesis for two contrasting diets using a series of inclusion rates of different additives

Reductive Acetogenesis in the Hindgut and Attempts to its Induction in the Rumen—A Review

Climate Change Impact on Livestock: Adaptation and Mitigation

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