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dc.contributor.author
Zhang, Xiaoyu
dc.contributor.author
Li, Yang
dc.contributor.author
Terranova, Melissa
dc.contributor.author
Ortmann, Sylvia
dc.contributor.author
Kehraus, Saskia
dc.contributor.author
Gerspach, Christian
dc.contributor.author
Kreuzer, Michael
dc.contributor.author
Hummel, Jürgen
dc.contributor.author
Clauss, Marcus
dc.date.accessioned
2022-09-27T06:10:39Z
dc.date.available
2022-09-22T03:34:33Z
dc.date.available
2022-09-27T06:10:39Z
dc.date.issued
2022
dc.identifier.issn
0931-2439
dc.identifier.issn
1439-0396
dc.identifier.other
10.1111/jpn.13773
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/572254
dc.description.abstract
Both in vitro and animal studies indicated that a higher dilution rate is related to a more efficient microbial synthesis and a lower methane (CH4) yield. The latter could be a consequence of the former, as an increase in microbial cell synthesis offers an alternative hydrogen sink competing with methanogenesis. To test this assumption in live animals, we applied a saliva stimulant, pilocarpine, to modify liquid flow rate in cattle. Four non-lactating cows (750 ± 71 kg) were fed forage only (restricted to constant intake) in a 4 × 4 Latin square design with oral doses of 0, 1, 2.5 and 5mg pilocarpine/kg body weight and day. We quantified feed and water intake, ruminal and total tract mean retention time (MRT) of solute and particle markers, ruminal microbial yield (via urinary purine bases or metabolic faecal nitrogen), CH4 emission, digestibility, chewing behaviour, reticular motility and rumen fluid parameters. The effect of induced saliva flow was evident by visibly increased salivation and water intake. Increasing the pilocarpine dosages resulted in a linearly decreased MRT of fluid and small particles (p < 0.001 and p< 0.05, respectively) and methane yield as related to digested DM (p < 0.05), the latter at a magnitude of 5%. No effect of treatment was found on ruminal microbial yield estimated via purine derivates. Metabolic faecal N as an indicator of microbial growth linearly correlated with pilocarpine dosages (p < 0.05). No significant relationship was found between pilocarpine dosages and large particle MRT, nutrient digestibility, ruminal pH and short-chain fatty acids. In conclusion, different from some in vitro studies, there was little indication of a reciprocal effect of CH4 and microbial biomass production in cows fed a forage-only diet.
en_US
dc.language.iso
en
en_US
dc.publisher
Wiley-VCH
en_US
dc.subject
digestion
en_US
dc.subject
methanogenesis
en_US
dc.subject
microbial synthesis
en_US
dc.subject
passage rate
en_US
dc.subject
pilocarpine
en_US
dc.subject
ruminant
en_US
dc.subject
salivation
en_US
dc.title
Effect of induced saliva flow on fluid retention time, ruminal microbial yield and methane emission in cattle
en_US
dc.type
Journal Article
dc.date.published
2022-09-16
ethz.journal.title
Journal of Animal Physiology and Animal Nutrition
ethz.journal.abbreviated
J. Anim. Physiol. Anim. Nutr.
ethz.identifier.wos
ethz.publication.place
Hoboken, NJ
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2022-09-22T03:35:13Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.exportRequired
true
ethz.COinS
ctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.atitle=Effect%20of%20induced%20saliva%20flow%20on%20fluid%20retention%20time,%20ruminal%20microbial%20yield%20and%20methane%20emission%20in%20cattle&amp;rft.jtitle=Journal%20of%20Animal%20Physiology%20and%20Animal%20Nutrition&amp;rft.date=2022&amp;rft.issn=0931-2439&amp;1439-0396&amp;rft.au=Zhang,%20Xiaoyu&amp;Li,%20Yang&amp;Terranova,%20Melissa&amp;Ortmann,%20Sylvia&amp;Kehraus,%20Saskia&amp;rft.genre=article&amp;rft_id=info:doi/10.1111/jpn.13773&amp;
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