The Distribution of Metallic Elements among Humus Substances in Soil from Volcanic Rocks

Abstract

The ability of humus substances to form stable complexes with inorganic and organic soil constituents plays a vital role in the generation of environmental pollution, migration, and pollutants transformation. This paper deals with the study of the sorption of metallic elements (Al, Ca, Cu, Fe, K, Mn, Mg, Zn) in Andosols, Cambisols, and Planosols on Slovak soil types based on the detection of the quality and quantity of humus substances and soil textural properties. Five soil profiles from two areas in the central part of the Western Carpathians on volcanic rocks in Slovakia were investigated. HS values increased with Al, Ca, Cu, Fe, K, and Mg. Fe, Al, Ca, Mg, K, Mn, Cu, and Zn increased with the FA fraction. Al, Ca, Fe, K, and Mg were increasing with increasing HA values. In the HA fraction, a very tight relationship was among K and Fe contents (r = 0.902). In the FA fraction, we found with increasing Cu content, Ca content also increased (r = 0.959). The HS values were positively correlated with the silt and negatively correlated with the clay and the sand fraction. Only the elements Mn and Zn in Planosol were below the detection limit. High concentrations of metallic elements were in Andosol.

Number of melanin-synthesising microorganisms under mineral fertilisation and liming of Albebeluvisoil

“…For grey forest soil, the opposite trends are observed: it is with the involvement of micromycetes melanins that humus molecules are synthesised in this type of soil when growing white lupine (r = 0.811). In typical chernozem, a low inverse correlation coefficient (r = -0.099) was found between the humus content and the number of azotobacter, and for grey forest soil the corresponding indicator was 0.482 (with the PFC of Azotobacter r = 0.360), which suggests that melanins of bacteria of the genus Azotobacter are insignificantly involved in the synthesis of humus molecules when growing sunflower on typical black soil, but this trend is reversed when growing white lupine on grey forest soil (Feszterová & Hudec, 2022).…”

Untitled

“…For grey forest soil, the opposite trends are observed: it is with the involvement of micromycetes melanins that humus molecules are synthesised in this type of soil when growing white lupine (r = 0.811). In typical chernozem, a low inverse correlation coefficient (r = -0.099) was found between the humus content and the number of azotobacter, and for grey forest soil the corresponding indicator was 0.482 (with the PFC of Azotobacter r = 0.360), which suggests that melanins of bacteria of the genus Azotobacter are insignificantly involved in the synthesis of humus molecules when growing sunflower on typical black soil, but this trend is reversed when growing white lupine on grey forest soil (Feszterová & Hudec, 2022).…”