The Amazonian Dark Earths (ADE)came from different activities of precolonial man on the original soil, resulting in the formation of a anthropic horizon. Several studies have been developed in anthropic soils, but with a focus on chemical and biological properties of these soils. Researches on the physical behavior of the soil in these environments are still incipient. Our objectives are (i) to evaluate the structural properties of the soil and its relationship to the organic components of soil, (ii) to evaluate the physical-hydric properties of the soil, and (iii) evaluate the influence of pyrogenic carbon on soil aggregation. The study will be conducted in the Ferreira Penna Scientific Station, a unit that belongs to the Emílio Goeldi Museum, located in Melgaço, state of Para. Will be determined the following physical properties: soil texture, bulk density, porosity, water retention curve, aggregate stability and tensile strength. The influence of the composition of soil organic matter (SOM) in the structural stability of anthropic soils will be determined through quantitative analyzes of SOM in aggregates. The pyrogenic carbon will be determined by the marker benzenepolycarboxylic acid (BPCA). It is expected obtain a characterization of structural and physical-hydric properties of these soils,by understanding the contribution of organic matter in the formation of its structure.
News published in Agência FAPESP Newsletter about the scholarship: