Description: Das Projekt "Organic matter composition in the subsoil: Contribution of root litter and microbial-derived compounds" wird vom Umweltbundesamt gefördert und von Technische Universität München, Wissenschaftszentrum Weihenstephan für Ernährung, Landnutzung und Umwelt, Lehrstuhl für Bodenkunde durchgeführt. The aim of P2 within the Research Unit 'The Forgotten Part of Carbon Cycling: Organic Matter Storage and Turnover in Subsoils (SUBSOM)' is to contribute to the understanding of the different sources and stabilization processes of subsoil organic matter. This will be achieved by the analysis of the soil organic matter composition in topsoil versus subsoil by 13C NMR spectroscopy in bulk soils as well as organo-mineral associations. This will be done on a number of soil profiles differing in parent material and mineralogy and therefore also in the relevance of organo-mineral associations for subsoil C stabilization. In addition, a specific sampling approach will allow to differentiate three zones associated with the dominating effect of (1) leaching of DOC (the 'bulk soil' between trees), (2) root litter decomposition (the 'root-affected zone'), and (3) direct rhizodeposition of root exudates (the 'rhizosphere' sensu strictu). The contribution of above-ground versus below-ground litter is differentiated by the analysis of cutin and suberin biomarkers. Organic matter derived from microbial sources will be identified by the microbial signature of polysaccharides in the subsoil through the analysis of neutral sugars and amino sugars. Organo-mineral associations will be further characterized by N2-BET analyses to delineate the coverage of the mineral phase with organic matter. With these analyses and our specific analytical expertise at the submicron scale (nanoSIMS) we will participate in selected joint experiments of the research unit.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: München ? Zucker ? Biomarker ? Material ? Baum ? Baumwurzel ? Humus ? Kohlenstoff ? Brunnen ? Bodenkunde ? Rhizosphäre ? Siedlungsabfall ? Spektralanalyse ? Organisches Material ? Wirkung ? Pflanzenwurzel ? Oberboden ? Unterboden ? Gelöster organischer Kohlenstoff ? Auslaugung ? Bodenprofil ? Bodenuntersuchung ? Flächennutzung ? Kohlenstoffkreislauf ? Mineralogie ? Boden ? Verwitterung ? Wirkung ? Forschung ? Mineral ? Abdeckung ? Speicherung ? Bauelement ? Erdoberfläche ? Gutachten ? Lagerung ? AUSGEWAEHLT ? VERBAND ? VERBINDUNG ? BAEUME ? BEITRAG ? EXPERIMENT ? Eltern ? PROBE ? SPEZIFISCH ? STABILISIERUNG ? ANALYTISCH ? TEIL ? UEBER TAGE ? UNTER ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2013-01-01 - 2024-11-29
Accessed 1 times.