Feedlot performance, feeding behavior and rumen morphometrics of Nellore cattle submitted to different feeding frequencies

dc.contributor.authorSilva, Juliana da
dc.contributor.authorBarbosa Carrara, Tassia Veluma [UNESP]
dc.contributor.authorStefano Pereira, Murillo Ceola [UNESP]
dc.contributor.authorOliveira, Cassiele Aparecida de
dc.contributor.authorBatista, Ivan Carlos [UNESP]
dc.contributor.authorMariano Watanabe, Daniel Hideki [UNESP]
dc.contributor.authorNagatani Rigueiro, Andre Luiz [UNESP]
dc.contributor.authorArrigoni, Mario De Beni [UNESP]
dc.contributor.authorMillen, Danilo Domingues [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-11-26T17:42:48Z
dc.date.available2018-11-26T17:42:48Z
dc.date.issued2018-03-01
dc.description.abstractOwing to the lack of information in the literature about the ideal feeding frequency adopted by feedlot systems, this study was designed to evaluate the effect of different feeding frequencies on performance, carcass traits, feeding behavior and rumen morphometrics of Nellore cattle. Forty-eight yearling bulls were housed in individual pens with an average initial body weight of 358.2 kg. The experiment was designed as a completely randomized block and the treatments were the feeding of cattle one, two, three, or four times daily (n = 12 per treatment). Orthogonal contrasts were used to assess linear, quadratic and cubic relationship between feeding frequency and the dependent variable. As feeding frequency increased, final body weight (p = 0.03) and average daily gain (p = 0.01; one: 0.98 kg d(-1); two: 0.96 kg d(-1); three: 1.18 kg d(-1); four: 1.14 kg d(-1)) increased linearly and the feed: gain ratio decreased (p = 0.02). Also, as feeding frequency increased, hot carcass weight was affected cubically (p = 0.01; one: 246.9 kg; two: 243.0 kg; three: 263.1 kg; four: 258.1 kg). During the adaptation period dry matter intake variation was affected cubically (p = 0.05; one: 16 %; two: 23 %; three: 14 %; four: 16 %). Increases in feeding frequency affected papillae height (p < 0.01) and papillae surface area (p < 0.01) cubically, as well as producing increases in the mitotic index (p = 0.05; one: 9 %; two: 11 %; three: 13 %; four: 13 %) and cells in proliferation (p = 0.05) linearly. Thus, Nellore yearling bulls should be fed three times daily in feedlot operations.en
dc.description.affiliationUniv Sao Paulo, FZEA, Dept Anim Sci, Av Duque Caxias Norte 225, BR-13635900 Pirassununga, SP, Brazil
dc.description.affiliationSao Paulo State Univ, FCAT, Rod Cmte Joao Ribeiro Barros Km 651, BR-17900000 Dracena, SP, Brazil
dc.description.affiliationSao Paulo State Univ, FMVZ, Dept Anim Breeding & Nutr, R Prof Dr Walter Mauricio Correa S-N, BR-18618681 Botucatu, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, FCAT, Rod Cmte Joao Ribeiro Barros Km 651, BR-17900000 Dracena, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, FMVZ, Dept Anim Breeding & Nutr, R Prof Dr Walter Mauricio Correa S-N, BR-18618681 Botucatu, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdFAPESP: 2012/02069-5
dc.format.extent121-128
dc.identifierhttp://dx.doi.org/10.1590/1678-992X-2016-0335
dc.identifier.citationScientia Agricola. Cerquera Cesar: Univ Sao Paolo, v. 75, n. 2, p. 121-128, 2018.
dc.identifier.doi10.1590/1678-992X-2016-0335
dc.identifier.fileS0103-90162018000200121.pdf
dc.identifier.issn1678-992X
dc.identifier.lattes0555360557852992
dc.identifier.scieloS0103-90162018000200121
dc.identifier.urihttp://hdl.handle.net/11449/163626
dc.identifier.wosWOS:000417892500004
dc.language.isoeng
dc.publisherUniv Sao Paolo
dc.relation.ispartofScientia Agricola
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectZebu
dc.subjectcarcass
dc.subjectconcentrate
dc.subjectintake
dc.subjectpapillae
dc.titleFeedlot performance, feeding behavior and rumen morphometrics of Nellore cattle submitted to different feeding frequenciesen
dc.typeArtigo
dcterms.rightsHolderUniv Sao Paolo
unesp.advisor.lattes0555360557852992

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