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Tipo: Artigo
Título: Effects of different sources of protein on digestive characteristics, microbial efficiency, and nutrient flow in dairy goats
Autor(es): Felisberto, Nivea Regina de Oliveira
Rodrigues, Marcelo Teixeira
Bomfim, Marco Aurélio Delmondes
Matos, Rogério da Silva
Cordeiro, Ana Gabriela Pombo Celles
Silva, Márcia Maria Cândido da
Abstract: Diets formulated with protein sources presenting different resistance to ruminal degradation were compared by evaluating ruminal parameters, production and microbial efficiency and nutrients flow to the omasum in goats. Eight rumen cannulated non-lactating, non-pregnant goats were distributed in a 4 × 4 Latin square design with two replicates. Treatments consisted of four diets where different sources of plant protein accounted for the major protein source named soybean meal, source of higher ruminal degradability, and three other sources of higher resistance of degradation: roasted soybean, corn gluten meal, and cottonseed cake. Amounts of rumen protein were similar among rations; however, flows of dry matter, protein and non-fiber carbohydrate to omasum were higher for diets with protein source with reduced rumen degradation rate. Higher values of rumen ammonia were obtained by using ration with soybean meal as major source of protein. Higher values of pH were obtained for rations with roasted soybean e cottonseed cake. Regarding kinetic of transit, similar values were found among rations. Diets with protein sources presenting reduced ruminal degradation increase nutrients flow to the omasum in goats and alter digestive parameters such as pH and ammonia without compromising bacteria growth and efficiency, which grants their use for dairy goats with similar efficiency to rations using more degradable sources of protein.
Palavras-chave: Ammonia nitrogen
Biological value
Microbial protein
Passage rate
Editor: Revista Brasileira de Zootecnia
Tipo de Acesso: Open Access
Data do documento: 23-Fev-2011
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