Features of Biogeochemical Processes of Soils in Urban Conditions Based on the Study of Ecosystems of Large Lysimeters of the Soil Stationary of MSU.

Autor: Bogatyrev, L. G., Zhilin, N. I., Karpukhin, M. M., Prokofieva, T. V., Benediktova, A. I., Zemskov, F. I., Vartanov, A. N., Glazman, G. R., Plekhanova, I. O., Shnyrev, N. A., Kubarev, E. N., Demin, V. V.
Zdroj: Moscow University Soil Science Bulletin; Jul2021, Vol. 76 Issue 3, p111-119, 9p
Abstrakt: The operation of stationary soil lysimeters is largely determined by the areal and vertical limitations of the soil mass. The areal spatial limitations of large lysimeters operating at the Moscow State University Soil Station and the proximity of phytocoenoses developing in them to each other contribute to the additional transport of plant litterfall by wind, while the vertical limitations eliminate the role of groundwaters and their soil-forming effects. The absence of lateral subsurface flow that is typical for natural landscapes and the increased inflow of alkaline-earth elements with atmospheric precipitation and dust reduce the manifestation of the eluvial–illuvial process. Comparative analysis of lysimetric waters in 1967–1968 and in 2014–2015 shows a significant increase in concentrations of such cations as calcium, sodium, magnesium, and potassium and such anions as chloride and sulfate over this period. The local spatial geochemical contrast of lysimetric waters caused by the impact of deicing agents does not affect the relative migration capacity of elements. Based on their biogeochemical accumulation levels in the soil, macroelements form the following series Ca > K > Al > Mg > N; microelements: Zn > Sr > Cu > Ba. The above patterns persist in all types of lysimeters. The calcium concentration in soils increases in the series: broadleaf forest > mixed forest > spruce forest > black fallow. The increased accumulation of elements in soils of spruce forests correlates with the humus type (moder-like) formed under them; this humus type is determined by the combination of coniferous and deciduous litterfall. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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