"Stabilization and dynamics of soil organic matter in relation to land management practices"
In agricultural systems, the processes of SOC formation and turnover are strongly influenced by management practices, whereas the role of microorganisms as the main drivers for carbon dynamics cannot be denied. To gain deeper insights into the mechanisms of SOC stabilization the separation of SOC fractions by physical fractionation methods (combined particles size and density fractionation) seems to be a useful tool.
One goal of my work is to bridge biotic processes and abiotic parameters by characterizing SOC fractions and DOC in their respective availability for biological transformation and their associated microbial community by analysis of the composition and content of low molecular weight substances, which have been successfully used as biomarkers in former studies (PLFA, amino acids, amino sugars, mono saccharides). Transformation experiments will provide information about bioavailability and turnover of these biomarkers within a SOC fraction. Furthermore, their relevance within the carbon transformation process will be investigated through accompanied determination of enzymatic activities as ecosystem functions of microbial biomass.
Schmidt J; Schulz E; Gutknecht J; Michalzik B (2013); Complex bioindicator analysis to assess interrelations between microbial community and carbon pool dynamics.
43. Jahrestagung der Gesellschaft für Ökologie, Potsdam (talk)
Schmidt J; Schulz E; Gutknecht J; Michalzik B (2012); Significance of various bioindicators to characterize the microbial community and soil quality under long-term fertilization.
Workshop „Regulation of soil organic matter and nutrient turnover in agriculture“, Kassel-Witzenhausen (talk)
Schmidt J; Schulz E; Gutknecht J; Michalzik B (2012); Long-term fertilization effects on biotic and abiotic factors of soil fertility and biomass production.
4th. International EUROSOIL Congress, Bari (talk)