Biogeosciences
Biogeosciences
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Articles | Volume 20, issue 22
Articles | Volume 20, issue 22
https://doi.org/10.5194/bg-20-4577-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/bg-20-4577-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 22
Research article
 | 
23 Nov 2023
Research article |  | 23 Nov 2023

Long-term additions of ammonium nitrate to montane forest ecosystems may cause limited soil acidification, even in the presence of soil carbonate

Thomas Baer, Gerhard Furrer, Stephan Zimmermann, and Patrick Schleppi

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Latest update: 25 Oct 2025
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Short summary
Nitrogen (N) deposition to forest ecosystems is a matter of concern because it affects their nutrient status and makes their soil acidic. We observed an ongoing acidification in a montane forest in central Switzerland even if the subsoil of this site contains carbonates and is thus well buffered. We experimentally added N to simulate a higher pollution, and this increased the acidification. After 25 years of study, however, we can see the first signs of recovery, also under higher N deposition.
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