Relationship between gain rate during the growing phase and forage allowance in the finishing phase in Nellore cattle

Autor(es)

Mota, Veronica A. C. ^[1] ; Fernandes, Rodolfo M. ^[1] ; Prados, Laura F. ^[2] ; Alves Neto, Joao A. ^[1] ; Berti, Guilherme F. ^[3] ; Resende, Flavio D. ^[2] ; Siqueira, Gustavo R. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Fac Ciencias Agr & Vet, Via Acesso, BR-14884900 Jaboticabal, SP - Brazil

^[2] Agencia Paulista Tecnol Agronegocios APTA, Ave Rui Barbosa, Caixa Postal 35, BR-14770000 Colina, SP - Brazil

^[3] Ctr Univ Fundacao Educ Barretos, Prof Roberto Frade Monte 389, BR-14783226 Barretos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: TROPICAL ANIMAL HEALTH AND PRODUCTION; v. 52, n. 4, p. 1881-1891, JUL 2020.
• Citações Web of Science: 0

Resumo

The study evaluated the effect of gain rates during the growing phase and the possible interaction with finishing phase forage allowance in beef cattle. In Exp. 1, eighty Nellore cattle (386 +/- 7.90 kg; divided into 16 paddocks) were used in a randomized block design in a 2 x 2 factorial arrangement of treatments: (1) gain rate during the growing phase (low and high); (2) forage allowance during the finishing phase (low and high). In Exp. 2, twelve cannulated animals were used to evaluate ruminal parameters at the finishing phase. The animals were supplemented (2% of body weight {[}BW]) during 112 days. The average forage mass was 6507 and 2712 kg DM/ha, resulting in a forage allowance of 2.91 and 1.31 kg DM/kg BW, respectively, for high and low supply. In Exp. 1, there was interaction among factors (P = 0.01) for average daily gain (ADG): low gain rate animals that were finished on high forage allowance had an ADG 0.203 kg/day greater than average of other treatments (0.917 kg/day). Animals with a high gain rate in the growing phase started the finishing phase 51.5 kg heavier than low gain rate animals; this difference dropped to 35.5 kg in final BW (P < 0.01). In terms of the carcass, this difference was 27 kg at the beginning and dropped to 25 kg at the final carcass weight (P < 0.01). In Exp. 2, the acetate concentration at the end was higher for animals fed high forage allowance compared to low. However, propionate concentration was higher for animals fed low forage allowance compared to high (P = 0.01). Our results showed that the growing phase influences performance during the finishing phase; however, forage allowance with high supplementation at the finishing phase had negligible effects under these experimental conditions. (AU)

• Processo FAPESP: 18/20176-0 - Impacto de diferentes estratégias de suplementação em novilhas Nelore sobre o desempenho nutricional e reprodutivo
• Beneficiário: Laura Franco Prados
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 14/05510-0 - Efeito de diferentes ofertas de forragem na terminação de bovinos nelore recebendo alta suplementação recriados com diferentes taxas de ganho
• Beneficiário: Verônica Aparecida Costa Mota
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 17/50339-5 - Plano de desenvolvimento institucional de pesquisa do Instituto de Zootecnia (PDIp)
• Beneficiário: Lenira El Faro Zadra
• Modalidade de apoio: Auxílio à Pesquisa - Programa Modernização de Institutos Estaduais de Pesquisa