ENVIRONMENTAL ASPECTS OF URBAN SOILS
DOI:
https://doi.org/10.24025/2306-4412.2.2019.172233Keywords:
urban soils, chemical transformation, soil physicochemical properties, humus, plantsAbstract
Physical and chemical transformation is typical for urban soils, that considerably aggravate their agroecological functions. The purpose of this work consists in ecological assessment of the current state of urban soils of Cherkasy. The city soils have a significant man-made load and contain many chemical xenobiotics. Diagnostics of the indicators of urban soils, which are crucial for assessing their ecological status and their agroecological functions, will provide an opportunity to determine the optimal and critical values for the sustainable functioning of urban landscapes and to propose the most effective and timely measures to be implemented. The urban soils analysis has shown that the humus content varies within the range of 0.03- 3.01 %, with an average value of 0.84 %, a standard deviation of 0.67, a dispersion of 0.41, a variation coefficient of 76 %. 6.25 % of the studied soil samples have insufficient supply of humus (2-4 %), 25 % have poor supply (1-2 %) and 69 % have extremely poor supply (less than 1 %). The active acidity (pH) varies from 6.45 to 10.90 with an average value of 7.20, a standard deviation of 0.83, a dispersion of 0.69, a variation coefficient of 11 %. The soils mostly have a weakly alkaline and neutral environment. The oxidation-reducing potential varies from 252 to 287 mV, with an average value of 262 mV (standard deviation of 7.3, a dispersion of 52.6, a variation coefficient of 3 %). The ratio of Ca2+ and Mg2+cations in soil adsorption complex is not optimal. The content of Ca2+ ranges from 3.80 to 10.12 mg-eq./100 g of soil with an average value of 6.60, a standard deviation of 1.66, a dispersion of 2.77, a variation coefficient of 25 %. The content of Mg2+ varies from 0.0 to 10.40 mg-eq./100 g of soil with an average value of 3.14 (standard deviation of 2.50, a dispersion of 6.26, a variation coefficient of 80 %). The content of K+ ranges from 0.12 to 6.20 with an average value of 0.59 mg-eq./100 g of soil, a standard deviation of 0.67, a dispersion of 1.39, a variation coefficient of 95 %. The soils have a significant deviation from optimal values and that characterizes them as anthropogenically and technogenically urbanized. There is a need in soil gypsuming, organic fertilizers, moisture supply and reduction of moisture evaporation, improvement of aeration conditions.
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Copyright (c) 2020 Ольга Олександрівна Мислюк, Олена Михайлівна Хоменко, Оксана В'ячеславівна Єгорова, Вікторія Ігорівна Пидоренко The authors who publish in this journal agree to the following terms:The authors reserve the right to authorship of their work and give the journal the right to first publish this work under the terms of the Creative Commons Attribution License CC BY-NC, which allows other persons to freely distribute published work with a mandatory reference to authors of the original work and the first publication of the work in this journal.
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