Comparison of N and C dynamics in two Norway spruce stands using a process oriented simulation model

H. Eckersten, C. Beier

    Research output: Contribution to journalConference articleResearchpeer-review


    Nitrogen and carbon dynamics of two Norway spruce stands were compared using a dynamic soil-plant simulation model (SOILN). The objectives were to evaluate differences in properties between the two stands and to explore the consequences on C and N dynamics. The young stand (25 years old) was located in south-west Sweden (Skogaby) growing on a loamy sand soil. The old stand (70 years old) was growing on a sandy soil in western Denmark (Klosterhede). Differences in specific rates of processes between the two sites were estimated in terms of parameter values derived by calibration of the model. Differences in daily flow rates and pathways of N and C were examined and budget components were simulated over a six year period. Simulations showed that the different stands had different specific rates for growth, allocation, litter fall and N uptake resulting in higher N uptake in the younger trees whereas growth was more similar. The soil carbon balance was positive and soil CIN ratio increased for the young stand. For the old stand the soil carbon balance was negative and the C/N ratio decreased. The soil mineral N levels were much lower in the younger stand which was explained by a higher plant uptake of organic N. At both sites the average pools and fluxes over the years were fairly well simulated indicating that N leaching predictions on average might be reliable.
    Original languageEnglish
    JournalEnvironmental Pollution
    Issue numberSuppl.1
    Pages (from-to)395-401
    Publication statusPublished - 1998
    EventInternational Nitrogen Conference - Noordwijkerhout, Netherlands
    Duration: 23 Mar 199827 Mar 1998
    Conference number: 1


    ConferenceInternational Nitrogen Conference


    • mineral N
    • organic N uptake
    • modelling daily N and C budgets


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