Microbiological Indicators of Erosion Processes in Arable Alluvial Soils

Gapeshin, D.I.; Ivanova, A.E.; Gracheva, T.A.; Pozdnyakov, L.A.; Demidov, V.V.

Авторы: Gapeshin D.I., Ivanova Anna E., Gracheva T.A., Pozdnyakov L.A., Demidov V.V.
Журнал: Вестник Московского университета. Серия 17: Почвоведение
Том: 77
Номер: 5
Год издания: 2022
Издательство: Изд-во Моск. ун-та
Местоположение издательства: М.
Первая страница: 374
Последняя страница: 383
DOI: 10.3103/S0147687422050039
Аннотация: This paper examines effects exercised by the degree of soil denudation on microbial-community characteristics in arable gray forest soils. The purpose of this study was to describe changes in the microbial community inhabiting the studied soils caused by the development of water-erosion processes and identify soil parameters having the greatest effect on these changes. Changes in chemical soil properties (humus, phosphorus, and potassium content and pH) caused by degradation (erosion) processes and their impacts on microbiological parameters were analyzed. Gas chromatography was used to examine relationships between basal and substrate-induced respiration and denitrification on the one hand and the soil denudation degree on the other hand. To determine the properties of soil fungal and actinomycete communities, including their structure, species composition, and abundance of colony-forming units, solid nutrient media were inoculated with soil-suspension dilutions. Quantitative and qualitative differences that distinguish fungal and actinomycete complexes formed under the impact of degradation processes were identified. The obtained data show a decrease in basal respiration intensity in denuded soils. Structures of microbial communities inhabiting soils with various denudation degrees indicate that water-erosion processes not only cause losses of soil organic matter, but also change the ratio between different substrates (shares of easily available compounds and plant residues decrease in denuded soils). As a result, the proportion of typical zonal species decreases and they are replaced by more stress-resistant organisms able to decompose hard-to-degrade substrates. Water erosion affects different groups of microorganisms in different ways; for instance, the number of fungal propagules decreases in denuded soils, while the abundance of actinomycetes increases.
Добавил в систему: Иванова Анна Евгеньевна

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Microbiological Indicators of Erosion Processes in Arable Alluvial Soilsстатья Исследовательская статья

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