S.M. Shevchuk, MONITORING OF GEOCHEMICAL PARAMETERS OF SOILS IN THE CITY OF POLTAVA
https://doi.org/10.15407/mineraljournal.47.04.058
UDC 504.53.052
MONITORING OF GEOCHEMICAL PARAMETERS OF SOILS IN THE CITY OF POLTAVA
S.M. Shevchuk, Doctor of Geographical Sciences, Professor
E-mail: serhii.shevchuk@pdau.edu.ua; orcid: 0000-0002-8155-8326
O.O. Laslo, Candidate of Agricultural Sciences, Associate Professor
E-mail: oksana.laslo@pdau.edu.ua; orcid: 0000-0002-0101-4442
L.G. Marinich, Candidate of Agricultural Sciences
E-mail: liubov.marinich@pdau.edu.ua; orcid: 0000-0002-0073-9433
Poltava State Agrarian University
36003, Poltava, Skovorody Str., 1/3
Language: Ukrainian
Mineralogical journal 2025, 47 (4): 58-67
Abstract: The results of long-term monitoring of geochemical parameters of dark gray podzolized soils of Poltava city (2005—2024) are presented. Samples were selected according to DSTU 4281:2004; analyses were performed in the laboratory of the North-Eastern Interregional Center of the State Institution "Institute of Soil Protection of Ukraine" according to generally accepted methods. The soil solution reaction range was determined to be pH 5.85—6.84 (average 6.18) and the humus content was 1.75—2.40 % (average 2.23 %). The content of alkaline hydrolyzed nitrogen ranged from 65.6—93.12 mg/kg (average 77.05 mg/kg), nitrate nitrogen — 20.67—25 mg/kg (average 23.43 mg/kg), and ammonium nitrogen — 19.39—24..55 mg/kg (average 21.76 mg/kg). Mobile forms of phosphorus and potassium were determined in the ranges of 130.23—168.92 and 110.48—174.23 mg/kg, respectively (average 147.89 and 128.10 mg/kg). It was found that the humus content is relatively stable for the studied soil type. The low level of alkaline hydrolyzed nitrogen is combined with an increased content of nitrates, which affects the activation of nitrification processes and the reduction of the ability of soils to retain ammonium forms of nitrogen in the absorption complex. Ammonium nitrogen remains relatively stable, but there is a potential threat of its transition to the nitrate form, which is exacerbated by the peculiarities of the mineralogy of the soils of Poltava, namely a decrease in the content of secondary clay minerals with high sorption capacity. At the same time, the level of potassium corresponds to average values, which is explained by its partial removal in the process of intensive land use. It is advisable to integrate the obtained results into the General Plan of Poltava (taking into account soil degradation zones); functional zoning schemes of the city (allocation of territories with reduced geochemical stability that require phytoremediation measures); agricultural practice (adaptive selection of crops and fertilization systems taking into account the mineralogical characteristics of soils); the city's environmental safety system (diagnosis of risks of groundwater pollution and nitrate migration in areas with low buffer capacity), in particular when determining the functional purpose of territories, regulating engineering loads, and developing programs for the sustainable development of urban landscapes.
Keywords: geochemical monitoring, dark gray podzolized soils, mobile forms of chemical elements, humus.
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