Fermentação ruminal, balanço de nitrogênio e respostas microbianas à suplementação com DDGS em ovinos alimentados com forragens de baixa qualidade

Autores

DOI:

https://doi.org/10.33448/rsd-v14i10.49871

Palavras-chave:

Ruminantes, Subprodutos agroindustriais, Concentrados proteicos.

Resumo

O objetivo deste estudo foi avaliar os parâmetros fermentativos e a população microbiana ruminal de ovinos alimentados com forragem de baixa qualidade (feno de capim Rhodes; Chloris gayana, Kunth), suplementados ou não com burlanda seca de milho (DDGS). Foram utilizados oito ovinos adultos (Ovis aries) distribuídos em dois tratamentos de acordo com a dieta recebida: Feno (H), apenas feno de capim-Rhodes; e H + DDGS, feno de capim-Rhodes + DDGS (proporção 64:36 com base na matéria seca). Ambas as dietas foram fornecidas ad libitum. Durante a etapa experimental, foi registrado o consumo de alimento e foram coletadas amostras de líquido ruminal para análise de pH, ácidos graxos voláteis (AGV) e nitrogênio amoniacal ruminal (N-NH₃). Os animais suplementados com DDGS apresentaram maiores concentrações de N-NH₃ (P = 0.0007), enquanto não foram observadas diferenças significativas nas concentrações de AGV (P = 0.466) ou no pH ruminal (P = 0.809) em comparação com os animais alimentados apenas com feno de capim-Rhodes. Os animais suplementados com DDGS apresentaram maiores concentrações de arqueias metanogênicas (P = 0.017) e de bactérias redutoras de sulfato (P = 0.009) no rúmen, mas não apresentaram diferenças na concentração de bactérias totais (P = 0.061). Embora a suplementação com DDGS tenha promovido uma melhora no balanço de nitrogênio, não foram detectadas diferenças significativas entre os tratamentos (P = 0.094). Em conclusão, os animais suplementados com DDGS apresentaram melhorias na atividade fermentativa ruminal sem alterações no pH e nos AGV em comparação com os animais que receberam apenas feno.

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Publicado

2025-10-29

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Ciências Agrárias e Biológicas

Como Citar

Fermentação ruminal, balanço de nitrogênio e respostas microbianas à suplementação com DDGS em ovinos alimentados com forragens de baixa qualidade. Research, Society and Development, [S. l.], v. 14, n. 10, p. e168141049871, 2025. DOI: 10.33448/rsd-v14i10.49871. Disponível em: https://www.rsdjournal.org/rsd/article/view/49871. Acesso em: 11 dez. 2025.