Abstract

MEDINA-HERRERA, Miriam del Rocío et al. Short-term amendment of biosolid on agricultural soil: effects on C and N mineralization and microbial activity. Acta univ [online]. 2022, vol.32, e2433.  Epub Oct 24, 2022. ISSN 2007-9621.  https://doi.org/10.15174/au.2022.2433.

Adding biosolids to agricultural soils can improve its quality through increased storage of C and N. A study to analyze the short-term impact of the addition of biosolids on the release of nutrients and the microbial activity in agricultural soil was carried out. The microbial biomass C (MB-C), urease activity (UA), and mineralization of N and C at different application rates of biosolids were evaluated (0 mg, 100mg and 200 mg of N-NH4 + kg-1). In addition, a biosolid-only treatment was tested. It was observed an increase in C and N mineralization, NH3 volatilization, and MB-C content, according to the application rate of biosolids. In biosolid treatments, UA increased 100% on average in the first seven days of incubation. These results suggest that the nutrient content in the soil is improved and microbial activity is positively stimulated.

Keywords : Urease activity; microbial biomass; CO₂ emissions; nitrogen available.

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