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The organic silk production includes the application of compost as cultivation practice to the mulberry crop. However, the effect of the organic fertilization on populations of rhizospheric bacteria is not always positive. To evaluate the effect of compost on the diversity of rhizospheric bacteria in mulberry crops ( Morus alba ), 0, 0.25, 0.5 and 1 kg.m -2 of compost was applied to mulberry plots arranged in a completely randomized blocks design. From each plot, DNA was extracted from the rhizospheric soil at 0, 5, 10 and 90 days after compost was applied and the V4 region of the 16S rDNA gene was amplified for its sequencing and taxonomic assignment of the OTUS. Alpha diversity indices showed the dominance of some taxonomic groups, such as the phyla Proteobacteria and Acidobacteria, and the genera Pseudomonas, Opitutus, Luteolibacter and Nitrospira . The beta diversity indicated similarity between the samples influenced by the compost application and the increase of the biodiversity in the plots sampled at the end of the experiment (90 days). The taxonomic groups dominated are characterized by their role in the nitrogen cycle. Thus, it was concluded that the application of 1 kg.m -2 of compost led to the increase of ground humidity, soil pH and nutrient availability which increased the rhizospheric bacteria diversity with positive changes in composition, richness and abundance at order, family and genera levels.

Efecto del compost en la diversidad de bacterias rizosféricas del cultivo de morera (Morus alba)