N2O emissions and NO3− leaching from two contrasting regions in Austria and influence of soil, crops and climate: a modelling approach

• DOI: 10.1007/s10705-018-9965-z
• Publication Date: 2018-12-18T10:42:47Z
• Authors: M. Kasper; C. Foldal; B. Kitzler; E. Haas; P. Strauss; A. Eder; S. Zechmeister-Bo...; B. Amon
• Keywords: Nitrous oxide; Emission inventory; Agroecosystem

National emission inventories for UN FCCC reporting estimate regional soil nitrous oxide (N2O) fluxes by considering the amount of N input as only influencing factor N2O emissions. Our aim was to deepen understanding from agricultural soils, including region specific and climate properties into estimation find targeted mitigation measures reduction nitrogen losses GHG Within this project, emissions nitrate (NO3−) leaching were modelled under spatially distinct environmental conditions in two regions Austria taking account climatic properties, management practices crop rotations. The LandscapeDNDC ecosystem model used calculate NO3− reflecting different types vegetation, operations In addition, assessed calculated. This approach allowed identifying hot spots Results show that certain combinations type, weather conditions, can lead high Mean values ranged 0.15 1.29 kg N2O–N ha−1 year−1 (Marchfeld) 0.26 0.52 (Grieskirchen). Nitrate leaching, which strongly dominated N-losses, often reacted opposite Larger quantities lost during years higher precipitation, especially if winter barley cultivated on sandy soils. Taking detected most efficient be addressed mitigate impacts while maximising production.