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Simulation of effects of soils, climate and management on N 2 O emission from grasslands Dmitri Chatskikh a, Jørgen E. Olesen a, Jørgen Berntsen a, Kristiina.

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Presentation on theme: "Simulation of effects of soils, climate and management on N 2 O emission from grasslands Dmitri Chatskikh a, Jørgen E. Olesen a, Jørgen Berntsen a, Kristiina."— Presentation transcript:

1 Simulation of effects of soils, climate and management on N 2 O emission from grasslands Dmitri Chatskikh a, Jørgen E. Olesen a, Jørgen Berntsen a, Kristiina Regina b & Sirwan Yamulki c Dmitri.Chatskikh@agrsci.dk

2 N flow in FASSET

3 Soil typeCut (% of applied N) Grazed (% of applied N) Grazed (% of total N) LowHighLowHighLowHigh Coarse sand 0.410.550.951.240.460.75 Loamy sand 0.681.031.752.470.801.46 Sandy loam 1.422.433.535.031.652.99 Simulated mean N 2 O emission factors as % of N input at low (200 kg N ha -1 ) and high (400 kg N ha -1 ) mineral N application rates for the Foulum climate

4 Table 4. Observed and simulated N 2 O emissions (kg N ha -1 ) SiteExperimentPeriodObservedSimulated JægersborgUNMay-Jul 19810.430.11 UNJul-Aug 19810.24 MIMay-Jul 19811.321.16 MIJul-Aug 19811.062.39 SLMay-Jul 19811.651.23 SLJul-Aug 19817.705.48 JokioinenCLMay-Dec 20000.464.07 CLJan -Dec 20010.963.17 CLJan -Aug 20021.332.38 LSJul-Dec 20000.490.51 LSJan-Dec 20011.511.02 LSJan - Aug 20020.820.71 Taw GreenCFFeb-Nov 20025.976.14 OFFeb-Nov 20022.421.83


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