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Measures to reduce direct and indirect climate-relevant emissions that result from denitrification in agricultural soils - SP C (MinDen)
Project
Project code: 2822ABS029
Contract period: 01.12.2022
- 30.11.2026
Budget: 276,248 Euro
Purpose of research: Applied research
Keywords: crop production, fertilization, emissions, modeling, plant nutrition, rye, wheat, farmyard manure
Gaseous emissions from denitrification (nitrogen oxide, NO, nitrous oxide, N2O and molecular nitrogen, N2) cause crop-relevant nitrogen losses (N losses) and direct N2O emissions. The level is extremely variable and depends on climate factors, management and soil properties. Crop mitigation measures in the field of fertilisation, tillage and crop rotation have hardly been investigated with regard to the role of denitrification, as the process is complexly regulated and difficult to measure at the field scale. The aim of this proposal is therefore to identify mitigation measures practicable from a crop production perspective with regard to N2 and N2O emissions from denitrification for arable farming systems in Germany. In this sub-project, field and laboratory experiments will be conducted to test measures for optimising liquid organic fertilisation and the incorporation of crop residues and catch crops for their effectiveness in preventing N losses from denitrification. To test the measures for optimising liquid-organic fertilisation, the effect of applying cattle slurry in a maize-wheat crop rotation by slitting with or without nitrification inhibitor or acidification will be investigated in a plot trial over several years. N2 and N2O emissions as well as N balance losses are recorded with improved 15N techniques. In addition, ammonia emission, nitrate leaching and N uptake by the plant, among others, are monitored. In order to test the incorporation of crop residues and catch crops, the effect of incorporation methods as well as the pre-shredding of crop residues and catch crops as a function of soil water content will be investigated in full-factorial laboratory incubation trials.
Section overview
Subjects
- Crop Production
Funding programme
Excutive institution
Federal Research Centre for Cultivated Plants – Julius Kühn-Institut (JKI)
Funding institution
Project management agencies
Associated projects: MinDen
- Measures to reduce direct and indirect climate-relevant emissions that result from denitrification in agricultural soils - SP A
- Measures to reduce direct and indirect climate-relevant emissions that result from denitrification in agricultural soils SP B
- Identification of measures to reduce greenhouse gas emissions caused by denitrification of agricultural land - SP D
