Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1058344
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dc.contributor.authorRODRIGUES, J. P. P.pt_BR
dc.contributor.authorLIMA, J. C. M.pt_BR
dc.contributor.authorCASTRO, M. M. D.pt_BR
dc.contributor.authorVALADARES FILHO, S. de C.pt_BR
dc.contributor.authorCAMPOS, M. M.pt_BR
dc.contributor.authorCHIZOTTI, M. L.pt_BR
dc.contributor.authorMARCONDES, M. I.pt_BR
dc.date.accessioned2016-12-09T11:11:11Zpt_BR
dc.date.available2016-12-09T11:11:11Zpt_BR
dc.date.created2016-12-09pt_BR
dc.date.issued2016pt_BR
dc.identifier.citationTropical Animal Health and Production, n. 48, p. 1387-1394, 2016.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1058344pt_BR
dc.descriptionOur objective was to estimate the energy and protein requirements of Holstein young calves up to 87 days old. Forty-two Holstein calves aged 4 days were used. From these, ten were randomly selected and slaughtered to compose the baseline slaughter (BS) group. The remaining calves were randomly assigned to eight treatments in a 4 × 2 factorial using a completely randomized design. The treatments were 2, 4, 6, and 8 kg/day of milk (297 g/kg CP; 319 g/kg of fat) fed twice daily, and then harvested at 59 or 87 days of age. Calves were fed a starter (193 g/kg CP; 133 g/kg NDF) ad libitum in all treatments. The calves slaughtered at 87 days of age had milk replaced by Coast-cross (Cynodoon sp.) hay (125 g/kg CP; 728 g/kg NDF). The net requirement of energy for maintenance (NEm) was 0.36 MJ/kg EBWG, with efficiency of utilization of energy for maintenance (km) of 59.4 %. The equation obtained to estimate the net requirement of energy for gain (NEg; MJ/d) was 4.40 × EBW0.099, with the efficiency of utilization of energy for gain (kg) equal to 46.5 %. The observed requirements of net and metabolizable protein for maintenance (NPm and MPm) were 3.67 and 3.88 g/kg BW0.75, respectively. The efficiency of use of metabolizable protein for maintenance (kpm) was 94.6 %. The predicted requirements were higher than those observed in the literature, and this study demonstrated that the requirements of newborn calves are higher than the recommended.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectComparative slaughterpt_BR
dc.subjectEfficiency of utilizationpt_BR
dc.subjectGrowthpt_BR
dc.subjectMaintenancept_BR
dc.subjectMetabolizable proteinpt_BR
dc.titleEnergy and protein requirements of young Holstein calves in tropical condition.pt_BR
dc.typeArtigo de periódicopt_BR
dc.date.updated2017-02-22T11:11:11Zpt_BR
dc.subject.nalthesaurusDairy calvespt_BR
dc.subject.nalthesaurusHolsteinpt_BR
dc.subject.nalthesaurusSlaughterpt_BR
dc.subject.nalthesaurusmetabolizable energypt_BR
riaa.ainfo.id1058344pt_BR
riaa.ainfo.lastupdate2017-02-22pt_BR
dc.contributor.institutionJoão Paulo Pacheco Rodrigues, UFV; Jessika Carolina Moutinho Lima, UFV; Marcelo Messias Duarte Castro, UFV; Sebastião de Campos Valadares Filho, UFV; MARIANA MAGALHAES CAMPOS, CNPGL; Mário Luiz Chizzotti, UFV; Marcos Inácio Marcondes, UFV.pt_BR
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