6533b7d4fe1ef96bd12625fe

RESEARCH PRODUCT

Dynamique de la communauté microbienne de sols tropicaux suite à une application répétée de fertilisants organiques et minéraux

subject

description

Organic waste products (OWP) with NPK mineral fertilization are known to have an impact on soil microbial communities. However, dynamic of these communities following a repeated OWP and NPK application has not been well described. In the present study, this dynamic was observed on soil sampled at the La Mare (La Réunion) field experiment, which was set up in 2013. This experiment includes control plot (without organic input, but mineral fertilization) and several plots receiving different types of OWP coupled with NPK fertilization. Physico-chemical parameters were measured on soils and OWPs (2013 to 2017). Soil microbial biomass (from 2013 to 2018) and the structure of microbial community (2014, 2015 and 2018) were also monitored. This last parameter was assessed by high throughout sequencing (RNAr 16S and 18S). Four years after OWP and NPK fertilization, an increase in microbial biomass was observed (%). A change of microbial community structure was also highlighted with a stimulation of Firmicutes, Proteobacteria, Glomeromycota and Basidiomycota throughout the years. Our results also suggested that microbial community structure dynamic was fertilization type dependent.