Components explain, but do eddy fluxes constrain? Carbon budget of a nitrogen-fertilized boreal Scots pine forest

Abstract

Nitrogen (N) fertilization increases biomass and soil organic carbon (SOC) accumulation in boreal pine forests, but the underlying mechanisms remain uncertain. At two Scots pine sites, one undergoing annual N fertilization and the other a reference, we sought to explain these responses.We measured component fluxes, including biomass production, SOC accumulation, and respiration, and summed them into carbon budgets. We compared the resulting summations to ecosystem fluxes measured by eddy covariance.N fertilization increased most component fluxes (P  0.05), but the components detected an increase in net ecosystem production (NEP) (190 (54) g C m−2 yr−1; P 

Keywords

canopy photosynthesis; carbon flux partitioning; carbon sequestration; carbon-use efficiency; eddy covariance; nitrogen fertilization

Published in

New Phytologist
2023, volume: 239, number: 6, pages: 2166-2179
Publisher: WILEY

SLU Authors

• Marshall, John

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    

• Tarvainen, Lasse

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    
  • University of Gothenburg

• Zhao, Peng

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    

• Lim, Hyungwoo

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    
  • University of Tartu

• Näsholm, Torgny

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    

• Lundmark, Tomas

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    

• Linder, Sune

  • Southern Swedish Forest Research Centre, Swedish University of Agricultural Sciences
    

• Peichl, Matthias

  • Department of Forest Ecology and Management, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Forest Science
Soil Science

Publication identifier

• DOI: https://doi.org/10.1111/nph.18939

Permanent link to this page (URI)

https://res.slu.se/id/publ/122322