Performance and metabolic evaluation in primiparous beef cows under grazing at different breeding ages

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorFederal University of Viçosa-
Autor(es): dc.contributorWashington State University-
Autor(es): dc.contributorState University of Mato Grosso do Sul-
Autor(es): dc.contributorNatural Resources Institute Finland (Luke)-
Autor(es): dc.creatorVital, Mariana da Natividade Ferreira-
Autor(es): dc.creatorPaiva, Juarez Júnior da Silva-
Autor(es): dc.creatorda Paixão, Robert Teixeira-
Autor(es): dc.creatorMarcondes, Marcos Inácio-
Autor(es): dc.creatorSilva Júnior, Jarbas Miguel da-
Autor(es): dc.creatorFranco, Marcia de Oliveira-
Autor(es): dc.creatorDetmann, Edenio-
Autor(es): dc.creatorSampaio, Cláudia Batista-
Data de aceite: dc.date.accessioned2025-08-21T21:45:16Z-
Data de disponibilização: dc.date.available2025-08-21T21:45:16Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-09-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s11250-024-04068-x-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/299301-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/299301-
Descrição: dc.descriptionWe aimed to evaluate the metabolic and performance differences in primiparous Nellore cows, which became pregnant at 14 or 24-mo old. Thirty-eight cows with 202 ± 5 days of gestation were divided into two treatments according to breeding age: 14 or 24-mo. Cows were evaluated for body weight (BW), body condition score (BCS), carcass characteristics, milk yield, calves’s performance, and blood characteristics. The animals were managed in eight paddocks under continuous grazing and evaluated from 90 d before parturition until 240 d after calving. We observed an interaction between breeding age and time (P < 0.01) for cow BW. Both breeding age categories experienced BW loss during parturition, with a concurrent decrease in BCS. However, following their first calving, the BW of 24-mo cows remained stable (P > 0.05), whereas 14-mo cows exhibited a gradual recovery in BW after parturition (P < 0.05). Milk yield was greater in 24-mo animals (P < 0.01), but decreased with increasing milking days (p < 0.05) for both groups. The weight gain calves from the heifers bred at 24-mo was greater (P < 0.01), which reflected in greater BW at weaning. The beta-hydroxybutyrate (β-OHB) concentration was greater before calving and a marked decrease after parturition (P < 0.05). The 24-mo cows had greater blood β-OHB (P < 0.01) at prepartum and 30 days after calving. Blood progesterone was greater in 24-mo cows (P > 0.05). Primiparous beef cows that conceive at either 14 or 24-months of age exhibit distinct nutritional requirements and metabolic profiles. Notably, cows that conceive at 24-months of age have the advantage of weaning heavier calves and displaying a more consistent reproductive cycle following their first calving than cows that conceive at 14-months.-
Descrição: dc.descriptionAnimal Science Department School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), São Paulo-
Descrição: dc.descriptionAnimal Science Department Federal University of Viçosa, Minas Gerais-
Descrição: dc.descriptionAnimal Science Department Washington State University-
Descrição: dc.descriptionAnimal Science Department State University of Mato Grosso do Sul, Mato Grosso do Sul-
Descrição: dc.descriptionNatural Resources Institute Finland (Luke)-
Descrição: dc.descriptionAnimal Science Department School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP), São Paulo-
Idioma: dc.languageen-
Relação: dc.relationTropical Animal Health and Production-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBeef cows-
Palavras-chave: dc.subjectBody condition-
Palavras-chave: dc.subjectBos indicus-
Palavras-chave: dc.subjectReproductive efficiency-
Palavras-chave: dc.subjectSerum metabolites-
Palavras-chave: dc.subjectSupplementation-
Título: dc.titlePerformance and metabolic evaluation in primiparous beef cows under grazing at different breeding ages-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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