Atributos microbiológicos do solo da unidade de aprendizagem em sistema agroflorestal de base agroecológica “Dona Dora”

Abstract

The Agroforestry System (SAF) by having an intensive management in the contribution of organic matter and crop diversity tend to change the chemical, physical and biological attributes of the soil. Thus, when evaluating the quality of the soil, microbiological indicators have great importance because they are sensitive, reflecting quickly the changes in the microenvironment. The purpose of this study was to characterize the microbiological attributes of the soil in two areas present at the Learning Unit in Agro-ecological based SAF "Dona Dora", localized at the Federal University of Mato Grosso (UFMT), Sinop/MT campus. Soil samples were collected in the experimental SAF area in the plots with and without addition of boulder dust and in the SAF Horta. In all areas twenty points of single samples were collected to form a composite sample and four repetitions were made for each area. From the soil samples, analyses were performed to evaluate microbial activity and the density of microorganisms in the soil. For statistical analysis, data were subjected to the Shapiro-Wilk normality test and analysis of variance (ANOVA), and means were compared by the Scott-Knott test at 5% probability. No significant differences were observed among areas for the analyses of Soil Basal Respiration (SBR), Biomass Carbon (BCC), metabolic quotient (qCO2), density of total bacteria and nitrogen fixing bacteria. However, the density of total fungi was significantly higher for the area with boulder dust addition from the experimental SAF compared to the other areas. The present study formed a database of soil attributes, thus enabling the construction of a microbiological history and contributing to future analyses of the area.