Efectos de la oleorresina de copaiba sobre la fermentación ruminal in vitro en bovinos

Objective. Plant extracts can beneficially modulate ruminal fermentation. Therefore, this study evaluated the effects of different copaiba oleoresin doses on in vitro rumen fermentation dynamics in bovines. Materials and methods. For that, four doses were explored: 0, 30, 300, and 3000 mg of copaiba oleoresin/L of incubation inoculum. An assay was performed to determine the in vitro dry matter degradability (IVDDM). In addition, volatile fatty acid (VFA) and ammonia nitrogen (NH3-N) concentrations at three incubation times (6,24 and 48 h) were determined. Differences between treatments were explored within each time by using the PROC MIXED of SAS. Results. The dose of 3000 mg/L resulted in lower IVDDM at all incubation times (p<0.05). The dose of 30 mg/L did not reduce IVDDM compared to the control treatment (p>0.05), except at 6 h of incubation. At 24 h of incubation, the concentration of 30 mg/L showed the highest acetate concentration (p<0.05), whereas concentrations of 30, 300, and 3000mg/L produced higher concentrations of propionate (p<0.05) compared to control treatment. The concentrations of butyrate were higher (p<0.05) with 300 and 3000 mg/L at 6 h of incubation. The dose of 3000 mg/L reduced the concentration of NH3-N at 6h and 24h of incubation (p<0.05). Conclusions. The findings of the current study reveal that copaiba oleoresin affects rumen fermentation dynamics in bovines. The concentration of 3000 mg/L drastically reduces IVDDM, which can be detrimental to ruminal fermentation. Future studies are encouraged to determine optimal doses, considering concentrations between 30 and 300 mg/L as a reference.