Branched-chain amino acids in cattle nutrition / Ácidos graxos voláteis de cadeia ramificada na nutrição de bovinos

AUTOR(ES)

Elmo Ribeiro do Val Neto

DATA DE PUBLICAÇÃO

2009

RESUMO

Pasture is the main source of cattle feed, but it is not capable of supplying the animal nutritional requirements completely. Therefore, an adequate management is necessary to improve productivity and reduce costs related to long term production. The search for technology to increase animal performance may be a feasible alternative to reduce costs with cattle nutrition. Fiber digesting ruminal bacteria utilize ammonia as their main source of nitrogen. Also, they have specific requirements for amino acids and an optimum growth when ruminal pH is around 6.2 to 6.8. For that, maximization of fiber fermentation is essential to increase ruminant production on pasture. Results of several experiments have shown that the supplementation of branched-chain amino acids (BCAA) increases feed intake, celluloses digestion, ruminal microbial growth, and daily gain for growing beef cattle. In this revision, studies show raise in milk production and daily gain in ruminants fed with forage based diets with the combination of some or all BCAA. In addition, this work makes possible to conclude that the supplementation with BCAA in association with rumen undegradable protein sources can increase animal production through the maximization of metabolizable protein.

ASSUNTO(S)

rumen degradable protein crescimento microbiano microbial growth proteína degradável no rúmen aminoácido essenciais essential amino acids producao animal

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