Open Access
Open access
Sustainability, volume 15, issue 3, pages 2277

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

Publication typeJournal Article
Publication date2023-01-26
Journal: Sustainability
scimago Q1
SJR0.672
CiteScore6.8
Impact factor3.3
ISSN20711050
Renewable Energy, Sustainability and the Environment
Building and Construction
Geography, Planning and Development
Management, Monitoring, Policy and Law
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 13C 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 kg1. 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 13C 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.

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