Impacto da redução do fósforo suplementar sobre fertilidade, habilidade materna e custos com suplementação mineral em vacas de corte mantidas em Urochloa decumbens: Rogério Magnoli Costa. -

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dc.contributor.advisorPonsano, Elisa Helena Giglio [UNESP]
dc.contributor.advisorMalafaia, Pedro Antonio Muniz [UNESP]
dc.contributor.authorCosta, Rogério Magnoli [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2016-05-17T16:51:20Z
dc.date.available2016-05-17T16:51:20Z
dc.date.issued2015-08-10
dc.description.abstractBrazilian livestock consists of animals raised and finished in tropical pastures, most of them established in medium and low fertility soils. The tropical forages, however, are limited in some nutrients, especially in minerals, which can compromise the results of cattle production. Among the minerals, phosphorus (P) occupies an important position due to its role in animals' metabolism and to its cost, which represents most of the mineral supplements costs, so rendering this input the most expensive for the definition of the production costs of cattle raised in grasslands. Often, the farmers do not follow the ideal techniques for the animal's' mineral supplementation and, besides that, practical observations suggest that not always the animal productivity is related to the mineral supplementation techniques or with the P contents of the supplements. Following the hypothesis that the recommended levels of P can be reduced without damaging the animal productivity, the aim of this trial was to check on the effects of reducing the phosphorus supplementation concentrations (from 4% to 1.8%) in a beef cow herd raised on Urochloa decumbens pastures on the productive and reproductive parameters, as well as on the supplementation costs. The study was conducted on the cerrado biome, from 2011 to 2013. Variables analyzed included pregnancy rate, calving interval, weight of calves at weaning and cost of supplementation. No changes were found for the productive and reproductive performance of the herd. However, there was a significant reduction in the supplementation costs when the herd was supplemented with a mineral mixture containing 1.8% phosphorusen
dc.format.extent62 f.
dc.identifier.aleph000864315
dc.identifier.capes33004021075P8
dc.identifier.citationCOSTA, Rogério Magnoli. Impacto da redução do fósforo suplementar sobre fertilidade, habilidade materna e custos com suplementação mineral em vacas de corte mantidas em Urochloa decumbens: Rogério Magnoli Costa. -. 2015. 62 f. Tese (doutorado) - Universidade Estadual Paulista Júlio de Mesquita Filho, Faculdade de Medicina Veterinária, 2015.
dc.identifier.filehttp://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/15-04-2016/000864315.pdf
dc.identifier.lattes9501017500294164
dc.identifier.urihttp://hdl.handle.net/11449/138440
dc.language.isopor
dc.publisherUniversidade Estadual Paulista (Unesp)
dc.rights.accessRightsAcesso aberto
dc.sourceAleph
dc.subjectBovino de cortept
dc.subjectPastagens extensivaspt
dc.subjectFosforo na nutrição animalpt
dc.subjectReprodução animalpt
dc.subjectSuplementos dieteticospt
dc.subjectMinerais na nutrição animalpt
dc.subjectCustopt
dc.subjectExtensive grazingpt
dc.titleImpacto da redução do fósforo suplementar sobre fertilidade, habilidade materna e custos com suplementação mineral em vacas de corte mantidas em Urochloa decumbens: Rogério Magnoli Costa. -pt
dc.typeTese de doutorado
unesp.author.lattes9501017500294164
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Medicina Veterinária, Araçatubapt
unesp.graduateProgramCiência Animal - FMVApt
unesp.knowledgeAreaMedicina Veterinária Preventiva e Produção Animalpt
unesp.researchAreaProdução e qualidade de alimentos de origem animalpt

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