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dc.contributor.authorSilva, Mauricio Dallmann dapt_BR
dc.contributor.authorLobato, Jose Fernando Pivapt_BR
dc.contributor.authorVaz, Ricardo Zambardapt_BR
dc.contributor.authorEloy, Lidiane Raquelpt_BR
dc.contributor.authorVaz, Marcia Bitencourtpt_BR
dc.date.accessioned2018-11-28T02:45:17Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn1516-3598pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/185127pt_BR
dc.description.abstractBody development and reproductive performance of a hundred forty-two 14 to 15-month-old heifers, classified at weaning according to frame size as small, medium, and large, were evaluated. The parameters evaluated were: body weight, hip height, body condition score, weight gain, ovarian activity, and pregnancy rate. At weaning, body weight and hip height were significantly different among frame scores, (small – 133.0 kg, 92.2 cm; medium – 158.5 kg, 96.6 cm; and large – 185.2 kg; 100.2 cm). After weaning, heifers grazed together on natural pastures during the autumn and on ryegrass (Lolium multiflorum La.) during the winter and spring. Frame score differences remained until the beginning of the breeding season (BS), starting on average at 14 months of age. Weight gain between weaning and the beginning of BS was not different among frame scores (0.740 kg/day, on average). Body weights at the beginning of the BS were significantly different, of 255.7 kg (53.3% of the mature weight) for small heifers, 285.0 kg (59.4%) for medium heifers, and 307.6 kg (64.1%) for large heifers. Ovarian activity at the beginning of the BS was not different among the three groups. The average weight gain values during the BS of 0.492, 0.472, and 0.421 kg/day for small, medium, and large heifers, respectively, were significantly different. Pregnancy rates were not different among groups (small, 71.4%; medium, 76.4%; and large, 76.5%). Frame score did not influence the reproductive performance of heifers, but the small and medium heifers conceived 29 and 20 days earlier, respectively, than the large heifers.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofRevista brasileira de zootecnia. Viçosa, MG. Vol. 47 (2018), [art.] e20170031, 9 p.pt_BR
dc.rightsOpen Accessen
dc.subjectPerformancept_BR
dc.subjectAge at conceptionen
dc.subjectReprodução animalpt_BR
dc.subjectAverage daily gainen
dc.subjectBody condition scoreen
dc.subjectPrenhezpt_BR
dc.subjectHip heighten
dc.subjectOvarian activityen
dc.subjectPregnancy rateen
dc.titleDevelopment and reproductive performance of Hereford heifers of different frame sizes up to mating at 14-15 months of agept_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001079267pt_BR
dc.type.originNacionalpt_BR


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