Role of dissolved organic matter and roots on physical microhabitats in subsoil

This sub-project aims to offer new insights on the assessment and the relevance of small-scale structural and interfacial heterogeneity for soil organic matter stabilization processes in forest subsoils. The overall assumption is that water repellency promotes substrate and decomposer separation on a micro-scale, which will be assessed by:
I) Creating a highly defined “model soil profile” in the lab to simulate transport/transformation processes of dissolved organic matter under controlled hydraulic conditions using serially-connected flow cells filled with undisturbed soil.
II) Tracing the fate of 13C-labelled dissolved organic carbon in the laboratory soil profile and to detect the combined effects of soil structure and particle interfacial properties on transport and selective sorption processes after passing each cell.
III) Elucidating the role of beech fine roots on rhizospere wettability and soil hydraulic functions (i.e. water retention, hydraulic conductivity).

Project leader

Prof. Dr. Jörg Bachmann
University of Hannover
Institute of Soil Science

Herrenhäuser Str. 2
30419 Hannover

 

Contact:
Phone: +49 (0) 511 762-3672
Mail to: bachmann(at)ifbk.uni-hannover.de

Dr. Marc-Oliver Göbel
University of Hannover
Institute of Soil Science

Herrenhäuser Str. 2
30419 Hannover

 

Contact:
Phone: +49 (0) 511 762-5698
Mail to: goebel(at)ifbk.uni-hannover.de

Ph.D. student

M.Sc. Henrik Redweik
University of Hannover
Institute of Soil Science

Herrenhäuser Str. 2
30419 Hannover

 

 

Contact:
Phone: N/A
Mail to: redweik(at)ifbk.uni-hannover.de