Partyka T. Labile soil organic matter and its indicating role

Thesis focuses on detailed quantitative, qualitative and functional assessment of organic matter of Upperdniester alluvial plain, particularly its labile pool, as the main source of CO2 emission. Maximal values of water-soluble and easily-oxidizable organic matter fractions were observed in peat soils and minimal - in arable sod and meadow soils. Different sensitivity of methods used to assess labile pool of organic matter was revealed. The positive correlation between the content of labile soil organic matter and light particle size fractions was shown, except for arable mineral soils. The largest flow of carbon dioxide from the soil surface was observed in peat soil. Сarbon dioxide emission in agricultural soils drastically reduces due to the low content of organic matter and its labile fractions. Due to the largest temperature coefficient Q10 (1.27) in peat soils, they were proposed to use as the model to monitor the impact of global warming on soils.