2013 Fiscal Year Final Research Report
Molecular characterization of ruminal microbes for the augmentation of nitrite reduction and for the supplession of methane emission
| Project/Area Number |
23580377
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Zootechnical science/Grassland science
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| Research Institution | Meiji University |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | ルーメン / ルーメン微生物 / 反芻動物 / メタン抑制 / メタン菌 / 亜硝酸中毒 / 亜硝酸還元 / 硝酸態窒素 |
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| Research Abstract |
The effects of dietary nitrate addition on ruminal fermentation characteristics and microbial populations in goats were investigated. Addition of nitrate resulted in a decrease in the total concentration of ruminal volatile fatty acids, an increase in the acetate:propionate ratio, and increases in the ammonia and lactate concentrations. Populations of methanogens, protozoa, and fungi were greatly decreased as a result of nitrate inclusion in the diet. There was modest or little impact of nitrate on the populations of prevailing species or genus of bacteria in the rumen, whereas Selenomonas ruminantium greatly increased. Quantification of the genes encoding nitrate reductase and nitrite reductase of S. ruminantium showed that these genes were increased by feeding nitrate, suggesting that the growth of nitrate- and nitrite-reducing S. ruminantium is stimulated by nitrate addition. Thus, S. ruminantium is likely to play a major role in nitrate and nitrite reduction in the rumen.
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[Journal Article] Responses in digestion, rumen fermentation and microbial populations to inhibition of methane formation by a halogenated methane analogue2012
Author(s)
Mitsumori M, Shinkai T, Takenaka A, Enishi O, Higuchi K, Kobayashi Y, Nonaka I, Asanuma N, Denman SE, McSweeney CS.
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Journal Title
The British Journal of Nutrition
Volume: Vol.108
Pages: 482-191
DOI
Peer Reviewed
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