Fixação Biológica do Nitrogênio Atmosférico - Sistema de Vida Livre - Parte 1

Biological nitrogen fixation occurs in three systems with varying degrees of complexity, listed below: free-living systems, associative systems, and symbiotic systems. Free-living systems involve diazotrophic microorganisms that occur in the rhizosphere and in non-rhizospheric regions, such as fixation performed by autotrophic and diazotrophic microorganisms like cyanobacteria. In this case, free-living fixation is more efficient than fixation performed by heterotrophs. In this video, Professor Silva addresses this topic thoroughly, highlighting the main microbial agents involved in this system.