Soil Organic Matter Composition in Urban Soils: A Study of Wrocław Agglomeration, SW Poland

Jakub Bekier, Elżbieta Jamroz (), Karolina Walenczak-Bekier and Martyna Uściła
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Jakub Bekier: Institute of Soil Sciences, Plant Nutrition and Environmental Protection, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland
Elżbieta Jamroz: Institute of Soil Sciences, Plant Nutrition and Environmental Protection, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland
Karolina Walenczak-Bekier: Institute of Soil Sciences, Plant Nutrition and Environmental Protection, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland
Martyna Uściła: Institute of Soil Sciences, Plant Nutrition and Environmental Protection, Wrocław University of Environmental and Life Sciences, 50-375 Wrocław, Poland

Sustainability, 2023, vol. 15, issue 3, 1-12

Abstract: In urban areas, because of anthropopressure, the transformation of the soil cover can lead to the complete destruction of the natural layout and properties of these soils. The object of this study was to determine the quantity and quality of soil organic matter (SOM) originating in the topsoil horizons of the central part of Wroclaw (SW of Poland). Fractional composition of SOM and humic substances (HS) analysis were performed. Elemental composition and CP MAS 13 C NMR spectra for the humic acids (HA) were determined, and α (aromaticity) and ω (oxidation) ratios were calculated. Total organic carbon content ranged from 22.39 to 66.1 g kg –1 , while that of total nitrogen ranged from 2.09 to 4.6 g kg 1 . In most analysed urban soils, the highest share in SOM was found for residual carbon (CR), while HA of low maturity was the predominant group over FA. CP MAS 13 C NMR spectroscopy of HA molecules indicated the structure of the samples was dominated by compounds with low aromaticity cores and considerable contents of aliphatic components. In urban soils, efforts should be made to enhance organic matter transformation into more matured and stable forms via, e.g., compost application and chemical treatments, and lawn maintenance should be very strictly controlled and limited.

Keywords: humic acids; fulvic acids; elemental composition; urban soils (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (2)

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