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Does soil organic matter in mollic horizons of central/east European floodplain soils have common chemical features?
Title Does soil organic matter in mollic horizons of central/east European floodplain soils have common chemical features? Author info Thilo Rennert, Svetlana Antić-Mladenović ... [et al.] Author Rennert Thilo (10%)
Co-authors Antić-Mladenović Svetlana (6%)
Barančíková Gabriela (7%)
Borůvka Luboš (6%)
Bosak Viktar (6%)
Cacovean Horea (6%)
Čechmánková Jarmila (6%)
Graf-Rosenfellner Markus (6%)
Kobza Jozef 1952- (7%) UMBFP01 - Katedra geografie a geológie
Mayer Stefanie (10%)
Michalski Adam (6%)
Pavlů Lenka (6%)
Rinklebe Jörg (6%)
Savin Igor (6%)
Rubinić Vedran (6%)
Source document Catena : an interdisciplinary journal of soil science, hydrology, geomorphology focusing on geoecology and landscape evolution. Vol. 200 (2021), pp. [1-10]. - New York : Elsevier B.V., 2021 Keywords fluvisols carbon stabilita - stability spectroscopy Form. Descr. články - journal articles Language English Country United States of America Annotation Soils on riverine floodplains in temperate climate may be characterized by a mollic epipedon, i.e. by dark colour, enhanced content of soil organic matter (SOM), high ‘base’ saturation and developed structure in the topsoil. We studied 124 soil samples from ten central/east European countries to investigate whether SOM in mollic horizons has similar chemical features. We determined carbon contents with a thermal-gradient method to differentiate SOM with varying thermal stability, and carbonates. We characterized SOM by diffuse reflectance infrared Fouriertransform (DRIFT) spectroscopy. According to the World Reference Base for Soil Resources, 102 of the samples fulfilled all criteria of a mollic horizon. Mollic features were not restricted to the uppermost horizon but also detected in buried former surface horizons. Soil colour was mostly the criterion to exclude non-mollic samples. Mollic and adjacent non-mollic horizons contained thermostable SOM, indicating SOM stabilized by interaction with minerals or as black carbon (BC), to very similar extent, up to 20.4% of total soil organic carbon (SOC). However, the correlation between the contents of thermostable SOC and total SOC, the SOC:N ratios of the thermostable fraction, and the smaller extent of metal complexation of carboxyl groups, pointed to a larger contribution of BC to SOM of mollic samples than to SOM in non-mollic samples. Thus, like in mollic horizons in Chernozems and Phaeozems not affected by fluviatile dynamics, SOM in mollic horizons of floodplain soils seemed to consist of SOM affected by natural or anthropogenic fires, constituting a common chemical feature of SOM. Thus, BC may contribute to soil colour and SOM stability in mollic horizons of floodplain soils. However, apart from BC contribution, SOM in mollic horizons of floodplain soils may have further pathways of formation and development, as SOM may be inherited from deposited material or form/transform by degradative or constructive processes. URL Link na plný text Public work category ADC No. of Archival Copy 49648 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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