Zbornik Matice srpske za prirodne nauke 2020 Issue 138, Pages: 19-29
https://doi.org/10.2298/ZMSPN2038019C
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Depth distribution of organic matter concentration and stocks in soils of Vojvodina
Ćirić Vladimir I. (University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia)
Manojlović Maja S. (University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia)
Nešić Ljiljana M. (University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia)
Belić Milivoj Đ. (University of Novi Sad, Faculty of Agriculture, Novi Sad, Serbia)
Despite the fact that soil organic matter (SOM) concentration is much lower
compared to mineral portion, its importance is very valuable for soil
fertility, agriculture, ecosystems and global environmental change. Soil
organic carbon (SOC) is a key component of SOM. The amount of SOC varies
greatly in surface layer of soil, but the vertical distribution of SOC is
also very important. The purpose of the study was to investigate vertical
distribution of SOC in soil profiles of the most common soil types in
Vojvodina (Arenosols, Chernozems, Fluvisols, Vertisols, Solonetz) and in
different land uses (arable land, meadow and forest). Soil samples were
collected from 0-30, 30-60 and 60-100 cm depth. Dichromate wet oxidation
method proposed by Tyurin’s was performed to determine SOC concentration.
Except arenosols, obtained results showed the decrease of SOC concentration
with depth in all observed soil types and land uses. Vertisols had the
highest SOC concentration in both surface (0-30 cm) and subsurface (30-60
cm) layers compared to the other soil types, while arenosols had the highest
SOC concentration in the deepest layer (60-100 cm). Higher concentrations
of SOC in surface layers were measured in forests and meadows in relation to
arable land, while in the lower layers these differences were not detected.
Differences in SOC concentration in observed soil types and land uses were
more pronounced in surface than in deeper layers. Soil organic carbon
concentrations in deeper layers were substantially different only between
soil types.
Keywords: soil organic matter, soil type, land use