Evaluación del efecto de levaduras comerciales sobre la fermentación ruminal y digestibilidad de los nutrientes mediante un sistema de medición de gas in vitro

Abstract

In the Animal Science and Ecology Faculty of the Autonomous University of Chihuahua-Mexico, three treatments were evaluated, T1 control treatment, T2 Alfalfa hay plus (yeast strain Saccharomyces cerevisiae GANADERO PLUS) and T3 Alfalfa hay plus (yeast strain Saccharomyces cerevisiae LEVUCELL SC-10) with six repetions by treatment. Completely randomized design were used and for the variables that presented significance (P<0,05), a means separation was performed with the TUKEY test. When determine the results, the digestibility in vitro of the neutral detergent fiber (NDF), acid detergent fiber (ADF) and lignin, T3 was reported as the best with 43.68; 39.76 and 0.5%, respectively. The production of total gas was established to the 25,5 hours, the T3 showed a less amount of ruminal gas (82,73 ml/500mg DM) and in the production of methane gas and CO_2 was obtained (29,42 ml/500mg DM) and (50,69 ml/500mg DM), respectively. Consequently, is recommended to use Saccharomyces cerevisiae, in another substrate type such as: concentrates and forage of a high nutritional value due the usage of fibrous forage did not achieve to reduce the gas amount.