Influence of a microbial additive on the voluntary intake of dry matter, neutral detergent fiber and indicators of the ruminal fermentation of goats fed Brachiaria brizantha hay
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Abstract
hay that was offered twice (8:30 and 16:30 h), at a rate of 1.2 kg animal-1 in dry basis (DB). The addition of the microbial additive in the ration, in the levels of 4.5 and 6.0 mL kg LW-1, increased (P < 0.01) the voluntary intake of DM and NDF. However, in the indicators of the ruminal fermentation studied: short chain fatty acids (CSFAt) and bacterial biomass (BB), the level 6.0 mL kg LW-1 of VITAFERT differed from the rest (P < 0.001). It is concluded that the stimulating effect of VITAFERT in the increase of DM and NDF intake depends on the dosage. The level 6.0 mL kg LW-1, together with a energy-protein supplement at a rate of 6 g kg LW-1, optimizes the system in respect to the increase of the fermentative capacity of the rumen, corresponding with the increase of the of the SCFAt and BB concentrations in goats fed Brachiaria brizantha hay of low nutritive value.
Key words: Saanen, VITAFERT, yeasts and lactobacilli
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