The present invention discloses a multiplier and modulator additive of the ruminal microbiota created from exogenous multienzyme compounds, integrating processes and devices for cultivating and harvesting biomass of selected fungal species, assembling active components of fungal origin and by mixing supplies according to specifications, forming thus a multiplier and modulator additive of the ruminal microbiota suitable for its application (as part of food or via distribution devices as a nutritional supplement) in the ruminant animal feed industry.
