Schätzrahmen zur Beurteilung von Ammoniakverlusten nach Ausbringung von Rinderflüssigmist

Assessment of NH₃ emissions after application of cattle slurry Over a two year period at different sites following application of cattle slurry measurements of NH₃ emissions have been carried out using the Integrated Horizontal Flux Method. The objective of these studies was to quantify NH₃ losses under field conditions and to investigate the influence of various environmental factors on the NH₃ emission. Depending on environmental conditions and infiltration rates NH₃ volatilization losses in the described experiments ranged from 12 to 65 per cent of the applied NH₄-N. Of the many factors influencing NH₃ emission three factors were chosen which can easily be measured or at least estimated. Using these factors a framework for an assessment of NH₃ emissions has been set up. Within this framework the expected NH₃ losses are estimated depending on infiltration rate of the slurry, mean aerial temperature, precipitation and time after application (with or without incorporation of manure). This framework offers a practical tool for evaluation of NH₃ losses after application of cattle slurry and may be used to avoid NH₃ losses under different environmental conditions.