Evaluación de compost con presencia de metales pesados en el crecimiento de Azospirillum brasilense y Glomus intraradices

Abstract

Compost is an organic material obtained as a result of the controlled microbial action on organic waste. Nowadays, farming is responsible of the integrated use of biofertilizers and compost, which represent an important alternative to reduce the use of chemical fertilizers. In this study the compost with presence of heavy metals on the growth of A. brasilense and G. intraradices was evaluated. Microbiological analysis of compost only revealed significant results for the growth of S. aureus and P. aeruginosa. The conclusion is that the use of compost with presence of heavy metals does not cause any adverse effects on the growth of A. brasilense and G. intraradices, since the two microorganisms were able to be isolated and identify in the rhizosphere of plants. Furthermore, observed metals did not exceed the maximum permissible limits by the international standards as NTC-5167 and standard 503 of EPA