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Biogeochemistry of denitrification from plant-soil mesocosm studies to biogeochemical modelling at the ecosystem level (DASIM)

Project

Environment and ressource management

This project contributes to the research aim ' Environment and ressource management'. Which funding institutions are active for this aim? What are the sub-aims? Take a look:
Environment and ressource management


Project code: keine Angabe
Contract period: 01.06.2016 - 31.05.2019
Purpose of research: Experimental development

The project, Biogeochemistry of denitrification, from plant-soil mesocosm studies to biogeochemical modelling at the ecosystem Level, focuses on the development and application of plant-soil chambers based on the Helium (He) gas flow technique to identify and quantify the importance of plant microbe interactions in the rhizosphere for the magnitude and temporal variability of soil denitrification N2 (and NO, N2O, CO2) gas fluxes. We hypothesize that plant photosynthesis and rhizosphere denitrification are closely coupled via root exudation, with relationships not being quantified yet. Experiments will be done with three different DASIM soils and two different plant species (rye grass and wheat) for a range of environmental temperature and moisture conditions, varying plant development stages and atmosphere compositions. In close cooperation with DASIM research groups we will investigate dynamics of root exudation, microbial key processes and changes in denitrification community composition. 15N labelling approaches will be used for microbial process studies, establishment of total N balances and method comparison. Results of WP7 and of the other groups will be used to inform the further development of the denitrification and soil physic modules of the biogeochemical model LandscapeDNDC.

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