Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118613
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dc.contributor.authorLAGE, C. F. DE A.eng
dc.contributor.authorCOELHO, S. G.eng
dc.contributor.authorDINIZ NETO, H. DO C.eng
dc.contributor.authorMALACCO, V. M. R.eng
dc.contributor.authorRODRIGUES, J. P. P.eng
dc.contributor.authorSACRAMENTO, J. P.eng
dc.contributor.authorMACHADO, F. S.eng
dc.contributor.authorPEREIRA, L. G. R.eng
dc.contributor.authorTOMICH, T. R.eng
dc.contributor.authorCAMPOS, M. M.eng
dc.date.accessioned2020-01-13T18:15:49Z-
dc.date.available2020-01-13T18:15:49Z-
dc.date.created2020-01-13
dc.date.issued2019
dc.identifier.citationPlos One, v. 14, n. 10, article e0223368, 2019.eng
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1118613-
dc.descriptionThe objectives of this study were: 1) to classify animals into groups of high and low feed efficiency using two feed efficiency indexes (Residual feed intake (RFI) and residual feed intake and body weight gain (RIG)), and 2) to evaluate if pre-weaning heifer calves divergent for feed efficiency indexes exhibit differences in performance, body measurements, digestibility, energy partitioning, and nitrogen partitioning. A total of 32 Gyr heifer calves were enrolled in a 63-d trial and classified into two feed efficiency (FE) groups based on RFI and RIG (mean ± 0.5 SD). The groups were classified as high efficiency (HE) RFI (HE RFI, n = 9; HE RIG, n = 10), and low efficiency (LE) RFI (LE RFI, n = 10; LE RIG, n = 11). The remaining animals were classified as intermediate (n = 13 (RFI) and n = 11 (RIG)). HE and LE calves had RFI values of?0.052 and 0.049 kg/d (P < 0.05), respectively. The HE RFI group consumed 8.9% less solid diet than the LE RFI group. HE RFI animals exhibited an increased digestibility of crude protein and ether extract and tended to have greater total dry and organic matter digestibility. LE RFI animals had greater gross energy and nitrogen intake, though greater fecal losses resulted in a tendency to reduce energy and nitrogen use efficiency. HE and LE calves had RIG values of 0.080 and -0.077kg/d (P ? 0.01), respectively. HE RIG animals exhibited greater average daily gain (9.4%), body weight (BW), and heart girth, though HE RIG group exhibited narrower hip width. HE RIG animals tended to have greater ether extract digestibility but greater methane losses (% of gross energy). HE RFI in pre-weaning heifers seems to be related to differences in digestibility. Divergent animals for RIG during the assessed phase appear to differ in body measurements, which may be related to differences in the composition of the gain.eng
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectFeed efficiencyeng
dc.subjectHipeng
dc.subjectBioenergeticseng
dc.titleRelationship between feed efficiency indexes and performance, body measurements, digestibility, energy partitioning, and nitrogen partitioning in pre-weaning dairy heifers.eng
dc.typeArtigo de periódicoeng
dc.date.updated2020-01-13T18:15:49Z
dc.subject.nalthesaurusMilkeng
dc.subject.nalthesaurusMethaneeng
dc.subject.nalthesaurusDieteng
dc.subject.nalthesaurusNutrientseng
riaa.ainfo.id1118613eng
riaa.ainfo.lastupdate2020-01-13
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0223368eng
dc.contributor.institutionCamila Flávia de Assis Lage; Sandra Gesteira Coelho; Hilton do Carmo Diniz Neto; Victor Marco Rocha Malacco; João Paulo Pacheco Rodrigues; João Paulo Sacramento; FERNANDA SAMARINI MACHADO, CNPGL; LUIZ GUSTAVO RIBEIRO PEREIRA, CNPGL; THIERRY RIBEIRO TOMICH, CNPGL; MARIANA MAGALHAES CAMPOS, CNPGL.eng
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