Tracking slurry-nitrogen...

As part of the GülleBest project, in addition to extensive field trials, a field lysimeter experiment was also carried out at the Braunschweig site to follow the pathways of slurry nitrogen in the spring. In addition to ammonia (NH₃) and nitrous oxide (N₂O) emissions, the use of ¹⁵N labeling also allowed the previously largely unknown contribution of dinitrogen (N₂) emissions following different slurry application techniques to be investigated. To complete the nitrogen balance, leachate losses, nitrogen uptake into the plant and nitrogen contents in the soil were also investigated. In addition to high NH₃ emissions depending on the application technique, it was shown that N₂ emissions were about 20 times higher compared to N₂O emissions, regardless of the application technique.

https://doi.org/10.1016/j.scitotenv.2023.162061