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dc.contributor.authorDalley, D. E.en
dc.contributor.authorIsherwood, Peteren
dc.contributor.authorSykes Andrew, R.en
dc.contributor.authorRobson, Alexander B.en
dc.date.accessioned2009-03-11T02:08:18Z
dc.date.issued1996-09en
dc.identifier.issn1173-8405en
dc.identifier.urihttps://hdl.handle.net/10182/881
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 H₂S0₄ or NaOH. The samples were centrifuged at 30 000 g for 30 min and magnesium (Mg) concentration measured in the 30 000 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.en
dc.format.extent1-11en
dc.language.isoenen
dc.publisherLincoln University. Centre for Computing and Biometricsen
dc.relationThe original publication is available from - Lincoln University. Centre for Computing and Biometrics - http://hdl.handle.net/10182/881en
dc.relation.ispartofseriesApplied Computing Research Reporten
dc.subjectmagnesium solubilityen
dc.subjectsheepen
dc.subjectpHen
dc.titleEffect of in vitro manipulation of pH on magnesium solubility in ruminal and caecal digesta in sheepen
dc.typeMonograph
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300400 Animal Production::300403 Animal nutritionen
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
dc.subject.anzsrc1402 Applied Economicsen
dc.subject.anzsrc0806 Information Systemsen
pubs.editionNo. 96/07en
pubs.organisational-group/LU
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.publication-statusPublisheden
pubs.publisher-urlhttp://hdl.handle.net/10182/881en
dc.publisher.placeLincoln, Canterburyen


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