High-resolution dynamics of available N in a grassland ecosystem under a multiple climate manipulation experiment

Evi Deltedesco, Erich Inselsbacher, Markus Gorfer, Sophie Zechmeister-Boltenstern, Katharina Keiblinger, Erich M. Potsch

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung


Nitrogen (N) is the most important limiting nutrient for plants and soil microorganisms in almost all ecosystems. Global environmental changes significantly affect the terrestrial N cycle but implications for plant available N in-situ remain unclear. Here, we investigated the simultaneous effect of elevated atmospheric CO2, an increase in temperature and a drying-rewetting event on diffusive N fluxes in soil of a managed permanent grassland at the multifactor climate manipulation experimental site ClimGrass (Austria) using microdialysis. Rewetting caused a significant, but short-lived increase in diffusive NH4+ and NO3− fluxes, which subsequently dropped until the end of the experiment. Harvesting induced a significant increase in diffusive NH4+ fluxes in the drying-rewetting treatments. However, elevated CO2 and soil warming had little effect on diffusive N fluxes. Our study suggests that more frequent soil drying-rewetting cycles associated with increased extreme weather events are uppermost among the climate change drivers affecting soil N availability.
FachzeitschriftApplied Soil Ecology
Frühes Online-DatumJan. 2023
PublikationsstatusVeröffentlicht - Mai 2023

Research Field

  • Exploration of Biological Resources


  • Amino acids
  • Climate change
  • Drying-rewetting
  • Extreme weather event
  • Harvest
  • Microdialysis

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