Estudio de la capacidad estabilizadora de una mezcla comercial de sustancias flavonoides (Bioflavex ®) sobre la fermentación ruminal en situaciones de acidosis inducida

Abstract

The effect of flavonoids Bioflavex ® (Exquim, SA, Barcelona Spain) on the prevention of rumen acidosis was studied in a 2 x 8 cross-over design using 8 crossbreed heifers (451.4 ± 14.32 kg of LW). Each period consisted of 22 d, from d1 to d20 animals were fed ryegrass hay , on d21 animals were fasted and d22 acidosis was induced by supplying 5 kg of ground wheat through the rumen cannula, the wheat was supplemented with (FL: 0.3‰) or without (CTR) flavonoids. PH decreases after wheat supplementation was lesser (P < 0.05) in FL than in CTR heifers (6.29±0.031 and 5.98± 0.029 for FL and CTR, respectively). Lactate concentration increased (P<0.005) with wheat supplementation being such increase numerically lesser (P < 0.09) in FL (from 36.8 to 106.6 mg/l) than CTR heifers (from 36.5 to 138.3 mg/l). After wheat supplementation, titers of Streptococcus bovis and Selenomonas. ruminantium increased whereas Megaesphera elsdenii increased only in FL heifers (P < 0.05). These results indicate that supplementation with Bioflavex® may be effective in reducing the incidence of rumen acidosis and it would be partially explained by flavonoids modulation of titers of lactate-consuming microorganisms such as M.elsdenii.