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Klas Lucander

Doctoral student

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The effect of nitrogen fertilization on tree growth, soil organic carbon and nitrogen leaching—a modeling study in a steep nitrogen deposition gradient in Sweden

Author

  • Klas Lucander
  • Giuliana Zanchi
  • Cecilia Akselsson
  • Salim Belyazid

Summary, in English

Nitrogen (N) fertilization in forests has the potential to increase tree growth and carbon (C) sequestration, but it also means a risk of N leaching. Dynamic models can, if the important processes are well described, play an important role in assessing benefits and risks of nitrogen fertili-zation. The aim of this study was to test if the ForSAFE model is able to simulate correctly the effects of N fertilization when considering different levels of N availability in the forest. The model was applied for three sites in Sweden, representing low, medium and high nitrogen deposition. Simulations were performed for scenarios with and without fertilization. The effect of N fertilization on tree growth was largest at the low deposition site, whereas the effect on N leaching was more pro-nounced at the high deposition site. For soil organic carbon (SOC) the effects were generally small, but in the second forest rotation SOC was slightly higher after fertilization, especially at the low deposition site. The ForSAFE simulations largely confirm the N saturation theory which state that N will not be retained in the forest when the ecosystem is N saturated, and we conclude that the model can be a useful tool in assessing effects of N fertilization.

Department/s

  • Dept of Physical Geography and Ecosystem Science
  • BECC - Biodiversity and Ecosystem services in a Changing Climate

Publishing year

2021

Language

English

Publication/Series

Forests

Volume

12

Issue

3

Document type

Journal article

Publisher

MDPI AG

Topic

  • Forest Science

Keywords

  • Boreal forests
  • Carbon sequestration
  • Eutrophication
  • ForSAFE

Status

Published

ISBN/ISSN/Other

  • ISSN: 1999-4907