Assessment of physical and chemical characteristics of water repellent soil profiles of Technosols from Maritsa-Iztok open-cast coal mine in Bulgaria
Plamen Ivanov, Irena Atanassova, Martin Banov, Ivaylo Kirilov
Abstract: The paper compares physical and chemical characteristics of technogenic soil profiles at coal mine spoil from Maritsa-Iztok Mines. Sites with coniferous vegetation and without vegetation were selected. Brief comparison was made between physicochemical characteristics of studied soil profiles and those from other mine spoils. Relations with previous studies are also provided. The technogenic soil profiles have high cation exchange capacity and organic carbon content. Soil water repellency was measured and its correlation with studied soil characteristics of the Technosols was established. The water drop penetration time (WDPT) decreases sharply after heating of extremely hydrophobic soil samples. Before heating it correlates significantly with exchangeable cations of aluminium (R*WDPT-Al = 0.863) in the soil profile under pine and less with hydrogen in the profile without vegetation (RWDPT-H8.2 = 0.409). In the pine site, significant correlation was also found between the WDPT and the total organic carbon (R*WDPT-TOC = 0.711) as well as with fulvic organic carbon (R*WDPT-FOC = 0.824). In the non-vegetated soil profile, the correlation is significant with the fraction of unextracted organic carbon (R*WDPT-Cunextr. = 0.644).
Keywords: soil chemical characteristics; soil hydrophobicity; soil physical characteristics; Technosols
Citation: Ivanov, P., Atanassova, I., Banov, M. & Kirilov, I. (2024). Assessment of physical and chemical characteristics of water repellent soil profiles of Technosols from Maritsa-Iztok open-cast coal mine in Bulgaria. Bulg. J. Agric. Sci., 30(3), 412–417
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| Date published: 2024-06-25
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