ISSN 2285-5785, ISSN CD-ROM 2285-5793, ISSN ONLINE 2285-5807, ISSN-L 2285-5785


Published in Scientific Papers. Series A. Agronomy, Vol. LXVI, Issue 1
Written by Oleksandr KAZIUTA, Alla KAZIUTA, Nataliia PALAMAR

Alluvial soils are a special product of pedolithogenesis, which takes place in floodplain conditions. Their formation is associated with the passage of floodplain and flood processes. This leads to the formation of soils that have maximum biogenicity and fertility levels. Changes in the conditions of soil formation during the year (changes in the level and composition of groundwater, the presence or absence of floods, features of the activity of the biological factor) cause changes in the physical and chemical parameters of soils, the intensity of the passage of biochemical processes, which is necessarily reflected in redox processes. This relationship is not only direct, but also reverse. The indicators of the redox potential of alluvial soils of the floodplains of the rivers of the Siversky Donets basin are given in the article. They were determined by the seasons of the year in layers at depths from 0 to 40 cm. The ORP level was determined in the field using the potentiometric method. Both for soil layers and for the seasons of the year, the indicators of the redox potential indicate the passage of reduction processes, and only in summer these processes can have the character of low-intensity oxidation. The restoration processes in the soil are most intense in spring. The bog alluvial soils of the near-Teras depression are characterized by more pronounced processes of reduction, as evidenced by the minimum values of the redox potential.

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