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Greenhouse gas reduction potentials in organic and conventional farming systems - influence of fertilization, tillage and nitrogen transfer in crop rotation (Transfer)
Project
Project code: 2822ABS034
Contract period: 01.04.2023
- 31.03.2026
Budget: 454,697 Euro
Purpose of research: Applied research
Keywords: crop production, fertilization, emissions, climate protection, maize, modeling, wheat, farmyard manure
In long-term field experiments, nitrous oxide emissions and ammonia emissions after fertilizer application are measured with high temporal resolution in organic and conventional farming systems at three experimental sites in order to elucidate mechanisms of greenhouse gas formation, to test crop production strategies for greenhouse gas reduction and to derive site-specific emission factors for national climate reporting. Greenhouse gas fluxes are measured in experiments with different crop rotation, tillage, and fertilization systems to determine area- and product-related emissions. In two field experiments, biochar is used in combination with organic and mineral fertilizers to analyze how soil nitrogen turnover, crop rotation, nitrogen transfer and nitrogen emissions are affected. Based on the experimental data, it will be evaluated whether it is possible to significantly reduce ammonia and nitrous oxide emissions by using biochar. In a further experiment, nitrogen dynamics and nitrous oxide emissions in organic and conventional cropping systems will be investigated. Based on the measured data, the emission potential of different organic and mineral N fertilizers as well as the N2O reduction potential of cropping systems will be evaluated. Nitrous oxide and ammonia emissions are related to nitrogen dynamics to elucidate causes and processes leading to high emissions. All crop management measures are evaluated for effects on yields and product quality, nitrogen balances, and nitrogen efficiency to assess their feasibility in agricultural practice. The experimental data improve the database for national climate reporting. They can be extensively used for the regionalization of ammonia and nitrous oxide mitigation measures. The transfer of the results into agricultural practice is done by publications in applied journals, the organization of workshops and field days.
Section overview
Subjects
- Resource management
- Climate Change
