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Comportamento de Novilhos Confinados com Silagens de Milho Oriundas de Diferentes Estádios de Maturação e Níveis de Concentrado na Dieta

DOI: http://dx.doi.org/10.18512/1980-6477/rbms.v10n1p56-65

http://rbms.cnpms.embrapa.br/index.php/ojs/index 

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Marcos R. Oliveira1, Mikael Neumann2, Marcos V. Faria2 & Jardel Neri3

 

Resumo: Avaliou-se o comportamento animal de novilhos confinados, alimentados com dietas que incluíram a silagem de milho nos estádios de maturação com 25,6 e 32,6% de matéria seca (MS), associados aos níveis de inclusão de 40 e 70% de concentrado, na base seca da dieta. Houve efeito significativo entre os níveis de concentrado de 40 e 70% na dieta, nas atividades de ruminação (8,16 contra 5,68 horas dia-1, respectivamente) e ócio (11,18 contra 15,14 horas dia-1, respectivamente). O uso da silagem de milho no estádio de maturação com 32,6% de MS influenciou nas atividades do comportamento dos animais nas frequências de consumo alimentar (15,7 contra 12,8) e ingestão de água (9,6 contra 7,2), frente à silagem com 25,6% de MS, enquanto, no estádio de maturação da silagem com 25,6% de MS, apresentou o maior teor de fibra fisicamente efetiva (FDNfe) em comparação a silagem com 32,6% de MS (5,7 contra 5,3%).  Os níveis de concentrado nas dietas, influenciaram no comportamento animal nos tempos dispensados para ruminação, ócio, consumo alimentar, frequência de ingestão de água, distribuição de partículas e FDNfe.

Palavras-chave: época de corte, fibra fisicamente efetiva, ruminação, tamanho de partícula.

 

Abstract: The animal behavior of feedlot steers was evaluated. The animals were fed diets including silage of maize at maturation stages 25.6 and 32.6% of dry matter (DM), associated to the inclusion of concentrate levels of 40 and 70% of the diet on a dry weight basis. There was an expressive effect of the concentrate level 40 and 70% on the rumination activities (8.16 vs. 5.68 hours day-1, respectively) and idling (11.18 vs. 15.14 hours day-1, respectively). The use of maize silage at maturity stage of 32.6% DM influenced the animal behavior regarding feed intake (15.7 vs. 12.8) and water intake frequency (9.6 vs. 7.2), if compared to the silage with 25.6% DM. Silage at the maturity stage presenting 25.6% DM, showed higher content of physically effective fiber (peNDF), when compared to the silage with 32.6% DM (5.7 vs. 5.3%). The concentrate levels on diets influenced the animal behavior regarding time spent ruminating, idling, feed intake, water intake frequency, particle distribution and peNDF.

Key words: harvesting time, particle size, physically effective fiber, ruminating

 

1 Doutorando em Zootecnia, Universidade Estadual de Maringá, Maringá, PR, Brasil, oliveira.marcos.r@gmail.com
2 Professor, Universidade Estadual do Centro Oeste, Guarapuava, PR, Brasil, mikaelneumann@hotmail.com; ventura_faria@yahoo.com.br
3 Mestrando em Zootecnia, Universidade Federal de Lavras, Lavras, MG, Brasil, jardelneri@hotmail.com

 

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