Digestibilidade total e síntese microbiana de novilhos em consumo limitado, recebendo suplementação de óleo de copaíba em associação à monensina de sódica

Abstract

The study aimed to evaluate steers with restricted intake, supplemented with monensin, copaiba oil and association. The parameters evaluated were: total digestibility, excretion of purine derivatives and microbial synthesis. Four Jersey ́s steers were used and kepted in individual paddocks receiving corn silage and protein supplementation with 38% CP. The experimental design was 4x4 Latin square. The treatments were: corn silage + protein supplement (control), corn silage + protein supplementation with monensin, corn silage + protein supplement with copaiba oil, corn silage + protein supplement with monensin and copaiba oil (association). The included amount of monensin was 0.9 mg/kg BW; and copaiba oil was 1.0 g/kg BW. Copaiba oil was diluted with isopropyl alcohol in a ratio of 0.5g copaiba oil to 7 ml of ethanol, to better spraying. The association between copaiba oil and monensin negatively altered the digestibility of dry matter and NDF, but if they act in isolation the effect was positive for crude protein. There were no effects on the excretion of purine derivatives, to the combination of monensin and monensin + copaiba oil. Copaiba oil increased excretion of total Purines and the association between monensin and copaíba negatively altered the microbial protein synthesis animals. The monensin and copaiba oil in combination reduces the dry matter digestibility and crude protein nitrogen and microbial synthesis, as used alone obtained similar behavior in digestibility and copaiba oil increased total purines and purines absorbed into the microbial synthesis.