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Crop plant root effects on the soil environment for denitrification in agricultural soils (DASIM)
Project
Project code: keine Angabe
Contract period: 01.06.2016
- 31.05.2019
Purpose of research: Inventory & Assessment
Research in P4 focusses on effects of crop plants on processes and rates of denitrification in agricultural soil. These effects refer to activities of plant roots that alter process conditions, rates and organisms relevant in denitrification. Plant effects will be systematically analyzed according to i) rhizodeposition, ii) nitrogen uptake by plant roots, iii) water withdrawal and iv) effects of biomass residues in the post-harvest period. As at times, plant effects cause massive shifts in denitrification substrate availability and their ratios, denitrification process stoichiometry is affected, leading for example to changes in the ratio of emitted N2O to N2. This has great environmental relevance. In series of systematic mesocosm studies with plants, the above mentioned four groups of effects will be studied in near to ceteris paribus experimental approaches. Analytics are based on standard online and manual trace gas analysis as well as on 15N and 13C labelling combined with isotopomer methods. This will provide gas flux rates and quantitative information on product stoichiometry which will be quantitatively related to plant processes. It is also intended to relate isotopomer-based information to responsible organisms in cooperation with P2. Experimental data will be used for parametrization of process algorithms in the different modelling levels.
Section overview
Subjects
- Crop Production
- Soil science
- Process engineering
- Climate Change
Collaborative Project
FOR 2337: Denitrification in Agricultural Soils: Integrated Control and Modelling at Various Scales
