Seasonal and Multi-Year Dynamics of Soil Moisture in Gleyic Chernozems (the Oka–Don Lowland)

Smirnova, M.A.; Bardashov, D.R.; Fil, P.P.; Lozbenev, N.I.; Dobrokhotov, A.V.

Авторы: Smirnova M.A., Bardashov D.R., Fil P.P., Lozbenev N.I., Dobrokhotov A.V.
Журнал: Eurasian Soil Science
Том: 57
Номер: 50
Год издания: 2024
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 1601
Последняя страница: 1615
DOI: 10.1134/S1064229324601653
Аннотация: The observed climate changes and increasing groundwater levels in the forest-steppe region shouldbe reflected in the water regime of meadow-chernozemic soils (Gleyic Chernozems). This article analyzes theseasonal dynamics of volumetric moisture content in a fallow Gleyic Chernozem (Siltic, Hyperhumic,Pachic) and two arable Gleyic Chernozems (Siltic, Aric, Hyperhumic, Pachic), as well as the level of groundwaterin the Tokarevskii district of Tambov oblast during the period from fall 2022 to summer 2023. Theobtained data are compared with regime observations of volumetric moisture content and groundwater levelsin these soils performed in 1969–1971. The use of automated monitoring systems for the soil moisture contentand groundwater levels has allowed continuous data collection on soil moistureand detailed tracking of seasonalchanges. The fallow meadow-chernozemic soils is characterized by higher moisture levels compared toarable soils; the upper horizons of cultivated soils are characterized by a higher frequency of wetting–dryingperiods and a shorter continuous duration of these periods, which is confirmed both by moisture monitoringdata and by the morphological features of the soils, such as the form of carbonate pedofeatures and the depthof their detection. During the observation period in 2022–2023, the meadow-chernozemic soils were relativelydry, despite the higher than normal annual precipitation. Wilting point moisture in the top 20-cm layerof cultivated soils was established from March 2023, and in the fallow soil, from the end of April 2023. Periodswith the moisture content exceeding the field capacity within the 60-cm-thick upper soil layer were notobserved during the entire observation period. The soils were drier than in the dry year of 1972, when themoisture content was less than the wilting point in the upper part of the profile from June to September. Inthe wet years of 1969–1970, the moisture content did not drop below the wilting point in the upper 20-cmlayer throughout the observation period. The main reason for this difference in the moisture content is thechange in the groundwater level: in 2022–2023, the groundwater level was more than 4 m deep, whereas in1969 it did not go deeper than 2 m, and in 1971, deeper than 4 m. As a result, the soil’s uptake of moisturethrough capillary rise did not occur in 2022–2023, and the water regime of the meadow-chernozemic soilsmore closely resembled the water regime of typical chernozems (Haplic Chernozems).
Добавил в систему: Смирнова Мария Андреевна

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Seasonal and Multi-Year Dynamics of Soil Moisture in Gleyic Chernozems (the Oka–Don Lowland)статья

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