Effect of supplementation level on performance of growing Nellore and its influence on pasture characteristics in different seasons

Autor(es)

Piza Roth, Marcella Toledo ^[1] ; Fernandes, Rodolfo Maciel ^[2] ; Custodio, Leticia ^[2] ; Moretti, Matheus Henrique ^[3] ; Oliveira, Ivanna Moraes ^[4] ; Prados, Laura Franco ^[4] ; Siqueira, Gustavo Rezende ^{[4, 5]} ; de Resende, Flavio Dutra ^{[4, 5]}

Afiliação do(s) autor(es)

^[1] UNIFEB, Ctr Univ Fundacao Educ Barretos, Barretos - Brazil

^[2] Univ Estadual Paulista, UNESP, Jaboticabal - Brazil

^[3] Agroceres Multimix, Rio Claro - Brazil

^[4] APTA, Colina, SP - Brazil

^[5] Univ Estado Sao Paulo UNESP, Colina - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Italian Journal of Animal Science; v. 18, n. 1, p. 215-225, JAN 2 2019.
• Citações Web of Science: 0

Resumo

Eighty-four Nellore bulls (269 +/- 27 kg; 13 months) were used in a completely randomized design to evaluate different supplementation strategies on the performance of growing Nellore cattle grazing Panicum maximum cv. Tanzania in the rainy season and rainy-to-dry season transition. In the rainy season, 42 animals received mineral salt (MS) ad libitum and 42 received protein supplement (PR) at 1 g kg(-1) body weight (BW). In the rainy-to-dry season transition, 28 animals received MS, 28 received PR at 1 g kg(-1) BW, and 28 received a protein-energy (PE) supplement at 3 g kg(-1) BW. In the rainy season, the PR supplement increased average daily gain (ADG), providing a significant increase of 17 kg in final BW. In the first period of the rainy-to-dry season transition, PE promoted better performance than MS, while PR did not differ from the two other treatments. In the second period of the rainy-to-dry season transition, PE and PR increased ADG by 41% and 31%, respectively, compared with MS. In the third period, all supplements differed from each other. Bulls fed PE had greater final BW compared with animals fed PR and MS. In conclusion, during the rainy season, PR supplementation should be provided even under good pasture conditions. Also, during the rainy-to-dry season transition, protein-energy supplementation is recommended to compensate for quantitative and qualitative deficiencies of the pasture. HIGHLIGHTS Nellore cattle being backgrounded on pasture with supplementation has greater body weight in the feedlot entry. Supplementation is recommended to compensate for quantitative and qualitative deficiencies of the pasture. Supplementation promotes a positive response in animal performance. (AU)

• Processo FAPESP: 16/01961-2 - Metanálise de diferentes planos nutricionais durante recria e seu impacto na terminação de bovinos de corte em regiões tropicais
• Beneficiário: Ivanna Moraes de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 11/02937-4 - Estratégias alimentares na recria e terminação de bovinos Nelore
• Beneficiário: Flávio Dutra de Resende
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/10340-3 - Estratégias Alimentares na Recria e Terminação de Bovinos Nelore
• Beneficiário: Ivanna Moraes de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado