A kinetic model of phosphorus metabolism in growing goats

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dc.contributor.authorVitti, D. M. S. S.
dc.contributor.authorKebreab, E.
dc.contributor.authorLopes, J. B.
dc.contributor.authorAbdalla, A. L.
dc.contributor.authorDe Carvalho, F. F. R.
dc.contributor.authorResende, Kleber Tomás de [UNESP]
dc.contributor.authorCrompton, L. A.
dc.contributor.authorFrance, J.
dc.contributor.institutionCtro. de Ener. Nucl. Na Agricultura
dc.contributor.institutionUniversity of Reading
dc.contributor.institutionCamp. Universitário de Socopo
dc.contributor.institutionUniv. Federal Rural de Pernambuco
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:19:57Z
dc.date.available2014-05-27T11:19:57Z
dc.date.issued2000-10-01
dc.description.abstractThe effect of increasing phosphorus (P) intake on P utilization was investigated in balance experiments using 12 Saanen goats, 4 to 5 mo of age and weighing 20 to 30 kg. The goats were given similar diets with various concentrations of P, and 32P was injected to trace the movement of P in the body. A P metabolism model with four pools was developed to compute P exchanges in the system. The results showed that P absorption, bone resorption, and excretion of urinary P and endogenous and fecal P all play a part in the homeostatic control of P. Endogenous fecal output was positively correlated to P intake (P < .01). Bone resorption of P was not influenced by intake of P, and P recycling from tissues to the blood pool was lesser for low P intake. Endogenous P loss occurred even in animals fed an inadequate P diet, resulting in a negative P balance. The extrapolated minimum endogenous loss in feces was .067 g of P/d. The minimum P intake for maintenance in Saanen goats was calculated to be .61 g of P/ d or .055 g of P/(kg.75·d) at 25 kg BW. Model outputs indicate greater P flow from the blood pool to the gut and vice versa as P intake increased. Intake of P did not significantly affect P flow from bone and soft tissue to blood. The kinetic model and regressions could be used to estimate P requirement and the fate of P in goats and could also be extrapolated to both sheep and cattle.en
dc.description.affiliationAnimal Nutrition Laboratory Ctro. de Ener. Nucl. Na Agricultura, Caixa Postal 96, CEP 13400-970, Piracicaba, SP
dc.description.affiliationDepartment of Agriculture University of Reading, Earley Gate, Reading RG6 6AT
dc.description.affiliationUniversidade Federal do Piaui Ctro. de Cie. Agrárias Camp. Universitário de Socopo, Teresina, PI
dc.description.affiliationDepartamento de Zootecnia Univ. Federal Rural de Pernambuco, Recife, PE
dc.description.affiliationFaculdade Cie. Agrarias V. Departmento Zootecnia de Ruminantes, Jaboticabal, SP
dc.description.affiliationUnespFaculdade de Ciências Agrárias e Veterinárias de Jaboticabal, Departamento de Zootecnia de Ruminantes, Jaboticabal, SP, Brazil
dc.format.extent2706-2712
dc.identifierhttp://www.journalofanimalscience.org/content/78/10/2706.long
dc.identifier.citationJournal of Animal Science, v. 78, n. 10, p. 2706-2712, 2000.
dc.identifier.file2-s2.0-0034295015.pdf
dc.identifier.issn0021-8812
dc.identifier.scopus2-s2.0-0034295015
dc.identifier.urihttp://hdl.handle.net/11449/66263
dc.language.isoeng
dc.relation.ispartofJournal of Animal Science
dc.relation.ispartofjcr1.711
dc.relation.ispartofsjr0,848
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectGoats
dc.subjectMetabolism
dc.subjectMineral Absorption
dc.subjectPhosphorus
dc.subjectSimulation Models
dc.subjectphosphorus
dc.subjectanimal
dc.subjectanimal food
dc.subjectbiological model
dc.subjectcattle
dc.subjectchemistry
dc.subjecteating
dc.subjectfeces
dc.subjectfemale
dc.subjectgoat
dc.subjectgrowth, development and aging
dc.subjectkinetics
dc.subjectmale
dc.subjectmetabolism
dc.subjectAnimal Nutrition Physiology
dc.subjectAnimals
dc.subjectCattle
dc.subjectEating
dc.subjectFeces
dc.subjectFemale
dc.subjectKinetics
dc.subjectMale
dc.subjectModels, Biological
dc.titleA kinetic model of phosphorus metabolism in growing goatsen
dc.typeArtigo
dcterms.licensehttp://journalofanimalscience.org/site/misc/ifora.xhtml
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agrárias e Veterinárias, Jaboticabalpt

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