Marcel Riedo

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A new study to address the biosphere-atmosphere exchange of ammonia (NH3) with grasslands is applying a European transect to interpret NH3 fluxes in relation to atmospheric conditions, grassland management and soil chemistry. Micrometeorological measurements using the aerodynamic gradient method (AGM) with continuous NH3 detectors are supported by bioassays(More)
The surface flux of nitric oxide from a wheat field was investigated from 23 March to 29 May 1997 in the Kerzersmoos, Switzerland. A plot fertilised with 19 kg N ha-1 in cattle slurry and 40 kg N ha-1 in mineral NH4NO3 fertiliser and a plot receiving no nitrogen containing fertiliser were compared. The flux was calculated based on hourly measurements of the(More)
Climatic change and increasing atmospheric CO2 concentration are expected to have significant effects on grassland ecosystems, but the magnitude of the responses may vary strongly across complex landscapes. A combination of the mechanistic pasture simulation model PaSim, statistical interpolation of climate parameters, and stochastic weather generation was(More)
The process-based Pasture Simulation Model (PaSim 2.5) has been extended to simulate N2O production and emission from grassland caused by nitrogen inputs from different sources. The model was used to assess the influence of management on N2O emissions, such as the effect of shifts in the amount and timing of fertilizer application. Model performance has(More)
Temporal variability in bioassays of ammonia exchange potential in relation to plant and soil nitrogen parameters in intensively managed grassland M. Mattsson, B. Herrmann, M. David, B. Loubet, M. Riedo, M. R. Theobald, M. A. Sutton, D. Bruhn, A. Neftel, and J. K. Schjoerring Plant and Soil Science Laboratory, University of Copenhagen, Faculty of Life(More)
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