Abstract
The study is concerned with the acidity of degraded agricultural soils. The main objective of the research is the actual and potential soil acidity of agricultural lands of the Donetsk People’s Republic on the example of agricultural farms in the northern part of the Shakhtyorskii district. It was found that the studied model sites are characterized by a slightly acidic, neutral, or slightly alkaline medium reaction, which creates favorable conditions for the formation of crops and plant growth. Investigation of exchangeable acidity of soils revealed the ambiguity of changes in its values, depending on the location of the model sites, system of soil management in the crop rotation, horizon, and other factors. The highest excess of the exchange acidity over the control values is characteristic of the slope surfaces of sites, on which the intensity of erosion processes reaches a maximum (exceeding the indicator by 8.6% on average compared to the control). In the future, increased values of exchangeable acidity may adversely affect the formation of crop yields. Changes in the values of hydrolytic acidity of soils follow the same pattern as the variation in the indices of exchangeable acidity. The most significant excess of the hydrolytic acidity index in comparison with the control was recorded on the sloping sites of the fields (increase by 11–17%). The conducted studies confirm the need for constant agroecological monitoring of these lands with regulation of the application of mineral fertilizers to increase the absorption capacity of soils due to increased values of exchangeable and hydrolytic acidity.
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Funding
This work was supported as a part of the state-funded research topic “Qualitative and Functional Characteristics of Soils of Agricultural Lands in the Steppe Zone and Pathways to Recovery of Their Biological Productivity.”
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Translated by E. Kuznetsova
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Agurova, I.V., Syshchykov, D.V. Acidity of Degraded Soils of Agricultural Lands in the Donetsk People’s Republic. Moscow Univ. Soil Sci. Bull. 78, 301–306 (2023). https://doi.org/10.3103/S014768742303002X
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DOI: https://doi.org/10.3103/S014768742303002X