Supplementing weanling pigs with high concentrations of Zn and the Zn availability of Zn sources for weanling pigs

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dc.contributor.authorSchell, Timothy C.en
dc.contributor.committeechairKornegay, Ervin T.en
dc.contributor.committeememberBunce, George E.en
dc.contributor.committeememberGwazdauskas, Francisen
dc.contributor.committeememberPfeiffer, Carl J.en
dc.contributor.committeememberWood, C.M.en
dc.contributor.departmentAnimal Scienceen
dc.date.accessioned2014-03-14T21:19:01Zen
dc.date.adate2008-09-19en
dc.date.available2014-03-14T21:19:01Zen
dc.date.issued1994en
dc.date.rdate2008-09-19en
dc.date.sdate2008-09-19en
dc.description.abstractThirteen trials (n=930) were conducted to investigate the supplementation of weanling pigs with high levels of Zn and to compare the availability of Zn from several Zn sources for weanling pigs. In the first four trials, supplementing Zn by injecting Zn acetate either i.m. or i.p. at various times near weaning did not improve postweaning growth performance compared with pigs that were not injected. Additionally, stressing pigs by regrouping and then injecting Zn acetate did not improve growth performance. Serum Zn concentrations were increased in all of the trials by the injection of Zn. In the next five trials, feeding 3,000, 2,000 or 1,000 mg Zn/kg of diet from ZnSO₄, Zn-lysine or Zn-methionine did not improve growth performance immediately after weaning compared with pigs fed diets with 105 mg Zn/kg of diet. Feeding 3,000 mg Zn/kg of diet as ZnO (P < .05) improved growth performance above that of pigs fed 3,000 mg Zn/kg of diet from the other sources, but did not improve growth performance compared to controls. Lower tissue Zn concentrations suggested a lower availability of Zn from ZnO compared with ZnSO₄, Zn-lysine and Zn-methionine. There was little difference in Zn availability among the other sources. In the next three trials, feeding diets with different levels of lysine had little influence on the availability of Zn from Zn-lysine compared to ZnSO₄. Results indicate that Zn from Zn-lysine is not absorbed in conjunction with the lysine component of the complex. Additionally, there were no differences in the availability of Zn from ZnSO₄ compared to Zn-lysine. In the last trial, Zn from ZnO was less available (P < .05) to Zn deficient pigs than ZnSO₄, Zn-lysine or Zn-methionine when rib bone Zn concentration was used as an indicator of Zn availability. In summary, supplementing weanling pigs with high levels of Zn immediately before or after weaning does not appear to improve growth performance. Furthermore, Zn from ZnO is less available to weanling pigs than Zn from ZnSO₄, Zn-lysine or Zn-methionine.en
dc.description.degreePh. D.en
dc.format.extentxiii, 166 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-09192008-063113en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-09192008-063113/en
dc.identifier.urihttp://hdl.handle.net/10919/39398en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V856_1994.S345.pdfen
dc.relation.isformatofOCLC# 32772008en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V856 1994.S345en
dc.subject.lcshSwine -- Feeding and feedsen
dc.subject.lcshSwine -- Growthen
dc.subject.lcshZinc -- Physiological effecten
dc.titleSupplementing weanling pigs with high concentrations of Zn and the Zn availability of Zn sources for weanling pigsen
dc.typeDissertationen
dc.type.dcmitypeTexten
thesis.degree.disciplineAnimal Scienceen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.leveldoctoralen
thesis.degree.namePh. D.en

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