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Does soil organic matter in mollic horizons of central/east European floodplain soils have common chemical features?

  1. TitleDoes soil organic matter in mollic horizons of central/east European floodplain soils have common chemical features?
    Author infoThilo 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
    LanguageEnglish
    CountryUnited States of America
    AnnotationSoils 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.
    URLLink na plný text
    Public work category ADC
    No. of Archival Copy49648
    Catal.org.BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
    Databasexpca - PUBLIKAČNÁ ČINNOSŤ
    ReferencesPERIODIKÁ-Súborný záznam periodika
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