Efecto de la adición de enzimas fibrolíticas en dietas empleando Opuntia ficus indica y agave salmiana en dietas suplementadas para bovinos

"En los sistemas de producción ganadera, las dietas absorben del 70 al 80% del total de los costos de producción. Opuntia ficus indica y Agave salmiana han demostrado ser una alternativa eficiente y una opción de forraje en la zona árida de México. A través de una fermentación sumergida empleando de fuentes de carbono de bajo costo (forrajes en zona árida) se evaluó la producción de exo-celulasas empleando Bacillus subtilis. El objetivo de esta investigación fue examinar el efecto sobre la producción de enzimas fibrinolíticas exógenas empleando forrajes disponibles (Opuntia y Agave) de las zonas áridas mexicana en dietas suplementadas para bovinos. El efecto de la producción de la enzima fue evaluada en la ingesta de alimento, parámetros productivos, fermentación ruminal y pH. Se utilizaron veinticinco bovinos Beefmaster machos con 5 repeticiones para cada tratamiento; T1 = Opuntia sin enzima, T2 = Opuntia con enzima, T3 = Agave sin enzima, T4 = Agave con enzima, T5 = control. Se realizó."

"In livestock production systems, food represents 70 to 80% of total production costs. Opuntia ficus indica and Agave salmiana have proven to be an efficient alternative and forage option in arid zone of Mexico. Submerged fermentation (SmF) using a low cost carbon sources (forage in arid zone) was evaluated to exo-cellulases production by Bacillus sp. The objective of this research is to examine the effects on the exogenous fibrolytic enzyme addition in available forage (Opuntia and Agave) in the arid Mexican zone on supplemented diet for cattle. The effect of enzyme production was examined in feeding intake, productive parameters, ruminal fermentation, and pH. Twenty five males Beefmaster cattle were used with 5 replicates for each treatment; T1=Opuntia without enzyme, T2=Opuntia with enzyme, T3=Agave without enzyme, T4=Agave with enzyme, T5=control. An enzimatyc kinetic assay was conducted utilizing Agave and Opuntia as substrate. Productive parameters, behavior, metabolites in serum, volatile fatty acid and pH were measured. No significant differences were observed in the measured productive parameters; however T2, presented a significant higher weight gain (KO.05). Metabolic blood test indicated that the glucose content was the only parameter with significant differences. Therefore, the addition of fibrolytic enzymes in diets with Opuntia and Agave as a forage source had a positive effect on animal behavior."