AVALIAÇÃO DOS INDICADORES QUÍMICOS E BIOLÓGICOS DE QUALIDADE DO SOLO DE CERRADO DEGRADADO APÓS O CULTIVO DE LEGUMINOSAS.

Abstract

Among the parameters used by the scientific community, the biomass evaluation is the most precise one in terms of presenting the biological components of the soil. Intending to evaluate the potential of the legumes Campo Grande Stylo, calopo (Calopogonium mucunoides) and pigeon pea regarding the recovery of damaged soil, sixteen plats of these legumes were planted in latin square form for later microbial biomass analysis. The microbial biomass was analyzed according to the Vance et. (1987) principles. No significant differences were found compared to the fallow, although circumstances like the lack of precipitation, the time of the year and the production of dry matter affected the microbial biomass development. The studied legumes that presented the largest microbial biomass production were the Campo Grande Stylo and the calopo (Calopogonium mucunoides), showing a trend of improvement compared to the fallow. Despite the stress factors, the microbial biomass showed a trend of improvement on the plats where the legumes were seeded, and it can be considered a prior parameter of agrisystem changes.