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dc.contributor.authorDalley, DE
dc.contributor.authorIsherwood, Peter
dc.contributor.authorSykes, Andrew
dc.contributor.authorRobson, Alexander
dc.date.accessioned2008-03-26T22:35:14Z
dc.date.available1997-08-01
dc.date.issued1997-08
dc.identifierhttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1997XR82900013&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=42fe17854fe8be72a22db98beb5d2208
dc.identifier.citationDalley, D. E., Isherwood, P., Sykes, A. R., & Robson, A. B. (1997). Effect of in vitro manipulation of pH on magnesium solubility in ruminal and caecal digesta in sheep. Journal of Agricultural Science, 129(1), 107-111.
dc.identifier.issn0021-8596
dc.identifier.otherXR829 (isidoc)
dc.identifier.urihttps://hdl.handle.net/10182/384
dc.description.abstractRumen and caecal digesta were collected, under anaesthetic, from eight sheep offered either hay, pelleted concentrate or pasture at the Johnston Memorial Laboratory, Lincoln University during 1991. Subsamples of digesta were incubated at 39°C for 1 h after adjustment of pH within the range 0·5–12 by the addition of H₂SO₄ or NaOH. The samples were centrifuged at 30000 g for 30 min and magnesium (Mg) concentration measured in the 30000 g supernatant fraction and in total digesta to assess Mg solubility. In rumen digesta, Mg solubility declined from 0·86 at pH 5 to 0·30 at pH 7 and differences in response between diets were small. Magnesium solubility in caecal digesta was generally higher than in ruminal digesta, and particularly at pH values >6. At pH 7 the difference was twofold. Moreover, differences were observed between diets in the rate of decline in solubility in caecal digesta with increasing pH. At pH 5, 0·90 of Mg from hay and concentrate diets was soluble compared with only 0·8 for pasture. At pH 7, Mg solubility in caecal digesta from hay and concentrate-fed animals was almost double that from pasture-fed animals (0·64 and 0·62 v. 0·36, respectively). The implications of the findings for Mg homoeostasis in ruminants are discussed.
dc.format.extentpp.107-111
dc.languageen
dc.language.isoen
dc.publisherCambridge University Press
dc.relationThe original publication is available from Cambridge University Press - https://doi.org/10.1017/S0021859697004486
dc.relation.urihttps://doi.org/10.1017/S0021859697004486
dc.rightsCopyright © 1997 Cambridge University Press
dc.subjectsheep
dc.subjectmagnesium solubility
dc.subjectpH
dc.titleEffect of in vitro manipulation of pH on magnesium solubility in ruminal and caecal digesta in sheep
dc.typeJournal Article
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300400 Animal Production::300403 Animal nutrition
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Agricultural Sciences
dc.identifier.doi10.1017/S0021859697004486
dc.subject.anzsrc07 Agricultural and Veterinary Sciences
dc.relation.isPartOfJournal of Agricultural Science
pubs.issue1
pubs.organisational-group|LU
pubs.organisational-group|LU|Agriculture and Life Sciences
pubs.organisational-group|LU|Agriculture and Life Sciences|AGSC
pubs.publication-statusPublished
pubs.volume129
dc.identifier.eissn1469-5146


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