The effect of stage of maturity on the biological availability of magnesuim from wheat and orchardgrass fed to sheep

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dc.contributor.authorStager, Cynthia Leeen
dc.contributor.committeechairFontenot, Joseph P.en
dc.contributor.committeememberGerken, Hubert J. Jr.en
dc.contributor.committeememberWebb, Kenneth E. Jr.en
dc.contributor.committeememberMcClure, William H.en
dc.contributor.committeememberWise, Milton B.en
dc.contributor.departmentAnimal Scienceen
dc.date.accessioned2014-03-14T21:49:16Zen
dc.date.adate2012-11-09en
dc.date.available2014-03-14T21:49:16Zen
dc.date.issued1976-12-05en
dc.date.rdate2012-11-09en
dc.date.sdate2012-11-09en
dc.description.abstractWheat, a tetany prone forage, and orchardgrass, a non-tetany prone forage, were cut at three stages of maturity to determine the magnesium availability in these forages for lambs. The forages were dried in forced air ovens and ground through a 2.5 cm screen. The nitrogen contents of the forages were not significantly different between forages but decreased quadratically with maturity in wheat (P < .Ol) and linearly in orchardgrass (P < .Ol). Nonprotein nitrogen was significantly higher in wheat than in orchardgrass. The magnesium content of the wheat was lower (P < .O1) than orchardgrass (.14 vs .21%). Magnesium content in wheat was similar at all maturities but decreased with maturity in orchardgrass. Potassium, calcium and phosphorous levels in the forages were similar between wheat and orchardgrass but decreased with advancing maturity in both forages. In two metabolism trials with 18 wether lambs, the biological availability of magnesium was determined for the two forages cut at three stages of maturity. The biological availability of magnesium for lambs fed wheat was slightly lower than for those fed orchardgrass. It increased linearly with increasing maturity in wheat (P < .O1) and tended to decrease with maturity in orchardgrass. In the first two maturities of wheat, the biological availability of magnesium was approximately 22% and for the third maturity it approached 39%. In orchardgrass, it was 36, 34 and 28% for maturities l, 2 and 3, respectively.en
dc.description.degreeMaster of Scienceen
dc.format.extentvi, 71 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11092012-040100en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11092012-040100/en
dc.identifier.urihttp://hdl.handle.net/10919/45552en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1976.S726.pdfen
dc.relation.isformatofOCLC# 39285029en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectlambsen
dc.subjectNutritionen
dc.subject.lccLD5655.V855 1976.S726en
dc.titleThe effect of stage of maturity on the biological availability of magnesuim from wheat and orchardgrass fed to sheepen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineAnimal Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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