2019
DOI: 10.3168/jds.2018-15647
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Molecular hydrogen produced by elemental magnesium inhibits rumen fermentation and enhances methanogenesis in dairy cows

Abstract: Hydrogen is a key metabolite that connects microbial fermentation and methanogenesis in the rumen. This study was to investigate the effects of elevated H 2 produced by elemental Mg on rumen fermentation and methanogenesis in dairy cows. Four nonlactating Chinese Holstein dairy cows were employed for this experiment in a replicated crossover design. The 2 dietary treatments included a basal diet supplemented with Mg(OH) 2 (14.5 g/kg of feed dry matter) or elemental Mg (6.00 g/kg of feed dry matter). When compa… Show more

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Cited by 11 publications
(9 citation statements)
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“…Ruminococcaceae has been demonstrated to be sensitive to starch, increased abundance of Ruminococcaceae in broilers from WCON group might also be related to lower ileal starch digestibility, because the addition of xylanase has been reported to increase starch digestibility (Choct et al, 1999;McCafferty et al, 2019a). The metagenome-assembled genomes of Mollicutes_RF9 group also have the CAZyme related with starch degradation, thus lower concentration of undigested starch flowing into the cecum might limit the growth of Mollicutes_RF9 (Ma et al, 2019) produce butyrate; in addition, genus norank_f_Lachnospiraceae, Shuttleworthia, and Ruminococcus_torques_group have been observed to be related to better performance (Torok et al, 2011;Lee et al, 2017;McCafferty et al, 2019a;Li et al, 2020). Genera (Hydrogenoanaerobacterium and Ruminococcaceae_V9D2013_group) from the phylum Firmicutes are also suggested to effectively produce butyrate (Fang et al, 2020;Ilaria et al, 2020;Sun et al, 2020).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Ruminococcaceae has been demonstrated to be sensitive to starch, increased abundance of Ruminococcaceae in broilers from WCON group might also be related to lower ileal starch digestibility, because the addition of xylanase has been reported to increase starch digestibility (Choct et al, 1999;McCafferty et al, 2019a). The metagenome-assembled genomes of Mollicutes_RF9 group also have the CAZyme related with starch degradation, thus lower concentration of undigested starch flowing into the cecum might limit the growth of Mollicutes_RF9 (Ma et al, 2019) produce butyrate; in addition, genus norank_f_Lachnospiraceae, Shuttleworthia, and Ruminococcus_torques_group have been observed to be related to better performance (Torok et al, 2011;Lee et al, 2017;McCafferty et al, 2019a;Li et al, 2020). Genera (Hydrogenoanaerobacterium and Ruminococcaceae_V9D2013_group) from the phylum Firmicutes are also suggested to effectively produce butyrate (Fang et al, 2020;Ilaria et al, 2020;Sun et al, 2020).…”
Section: Discussionmentioning
confidence: 99%
“…Ruminococcaceae has been demonstrated to be sensitive to starch, increased abundance of Ruminococcaceae in broilers from WCON group might also be related to lower ileal starch digestibility, because the addition of xylanase has been reported to increase starch digestibility ( Choct et al, 1999 ; McCafferty et al, 2019a ). The metagenome-assembled genomes of Mollicutes_RF9 group also have the CAZyme related with starch degradation, thus lower concentration of undigested starch flowing into the cecum might limit the growth of Mollicutes_RF9 ( Ma et al, 2019 ).…”
Section: Discussionmentioning
confidence: 99%
“…A factor potentially masking the effects of H 2 gas added to microbial cultures headspace is lack of equilibrium with dissolved H 2 (Wang et al, 2016). In that regard, two in vivo studies in which dissolved H 2 was indirectly delivered through the reaction of elemental magnesium (Mg) with water, reported decreases in total VFA concentration as a result of the augmented dissolved H 2 concentration (Wang et al, 2017;Ma et al, 2019), although the limitations of VFA concentration as a metric of rumen fermentation pointed out above are again acknowledged.…”
Section: Effects Of Dihydrogen Accumulation On the Rates Of Fermentatmentioning
confidence: 99%
“…Samples for DNA extraction were freeze-dried and then physically disrupted using a bead beater for 1 min. Microbial DNA extraction of samples was performed following the protocol described by Yu and Morrison (2004) and slightly modified by Ma et al (2019). The concentration and purity of total DNA were measured using an ND-2000 spectrophotometer (NanoDrop Technologies).…”
Section: Sample Analysesmentioning
confidence: 99%