Este articulo presenta los resultados de la versatilidad adaptativa y tolerancia de una consorcio bacteriano constituido por 10 cepas bacterianas endémicas de un suelo agrícola contaminado, proveniente de una finca productora de cebolla ubicada en la laguna de Tota en Aquitania, Boyacá, Colombia, expuesto al uso incontrolado de fertilizantes nitrogenados. La consorcio bacteriano aislado del suelo está conformado por: Bacillus megaterium, Bacillus licheniformis, Pseudomonas stutzeri, Acinetobacter sp, Propionibacterium sp, Peptoestreptococcus sp, Sthaphylococcus coagulasa negativa, Corynebacterium sp, Clostridium sp y Actinomyces sp. Se demostró que los microorganismos aislados tienen capacidad desnitrificante in vitro, transformando el nitrato a nitrógeno molecular. La consorcio bacteriano aislado se constituye en una alternativa de biorremediación para recuperar suelo agrícola contaminado con exceso de fertilizantes nitrogenados.This article presents the results of the adaptative versatility and tolerance of a bacterial consortium made up of 10 bacterial stocks endemic to a contaminated soil coming from an onion farm located near Laguna de Tota, Aquitania, Boyacá, Colombia. This soil has been exposed to the uncontrolled use of nitrogen rich fertilizers. The bacterial consortium from the soil is made up of Bacillus megaterium, Bacillus licheniformis, Pseudomonas stutzeri, Acinetobacter sp, Propionibacterium sp, Peptoestreptococcus sp, coagulasa negative sthaphylococci, Corynebacterium sp, Clostridium sp, and Actinomyces sp. It was demonstrated that the isolated microorganisms have in vitro denitrifying capabilities, thus transforming nitrates to molecular nitrogen. The isolated bacterial association constitutes a bioremediation alternative to recover the soil that has been contaminated by the excess of nitrogen rich fertilizers.