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Simulating Soil-Plant-Climate Interactions and Greenhouse Gas Exchange in Boreal Grasslands Using the DNDC Model

Author

Listed:
  • Daniel Forster

    (Natural Resources Institute Finland (Luke), Halolantie 31 A, 71750 Maaninka, Finland)

  • Jia Deng

    (Earth Systems Research Center, Institute for the Study of Earth, Oceans and Space, University of New Hampshire, 39 College Road, Durham, NH 03824, USA)

  • Matthew Tom Harrison

    (Tasmanian Institute of Agriculture, University of Tasmania, Newnham Drive, Launceston, TAS 7248, Australia)

  • Narasinha Shurpali

    (Natural Resources Institute Finland (Luke), Halolantie 31 A, 71750 Maaninka, Finland)

Abstract

With global warming, arable land in boreal regions is tending to expand into high latitude regions in the northern hemisphere. This entails certain risks; such that inappropriate management could result in previously stable carbon sinks becoming sources. Agroecological models are an important tool for assessing the sustainability of long-term management, yet applications of such models in boreal zones are scarce. We collated eddy-covariance, soil climate and biomass data to evaluate the simulation of GHG emissions from grassland in eastern Finland using the process-based model DNDC. We simulated gross primary production (GPP), net ecosystem exchange (NEE) and ecosystem respiration (Reco) with fair performance. Soil climate, soil temperature and soil moisture at 5 cm were excellent, and soil moisture at 20 cm was good. However, the model overestimated NEE and Reco following crop termination and tillage events. These results indicate that DNDC can satisfactorily simulate GHG fluxes in a boreal grassland setting, but further work is needed, particularly in simulated second biomass cuts, the (>20 cm) soil layers and model response to management transitions between crop types, cultivation, and land use change.

Suggested Citation

  • Daniel Forster & Jia Deng & Matthew Tom Harrison & Narasinha Shurpali, 2022. "Simulating Soil-Plant-Climate Interactions and Greenhouse Gas Exchange in Boreal Grasslands Using the DNDC Model," Land, MDPI, vol. 11(11), pages 1-13, November.
    • Handle: RePEc:gam:jlands:v:11:y:2022:i:11:p:1947-:d:959845
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    References listed on IDEAS

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    1. Vogeler, I. & Beukes, P. & Burggraaf, V., 2013. "Evaluation of mitigation strategies for nitrate leaching on pasture-based dairy systems," Agricultural Systems, Elsevier, vol. 115(C), pages 21-28.
    2. Höglind, Mats & Cameron, David & Persson, Tomas & Huang, Xiao & van Oijen, Marcel, 2020. "BASGRA_N: A model for grassland productivity, quality and greenhouse gas balance," Ecological Modelling, Elsevier, vol. 417(C).
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