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  • 1.
    Bahr, Adam
    et al.
    Lund University, Sweden.
    Ellström, Magnus
    Lund University, Sweden.
    Bergh, Johan
    Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
    Wallander, Håkan
    Lund University, Sweden.
    Nitrogen leaching and ectomycorrhizal nitrogen retention capacity in a Norway spruce forest fertilized with nitrogen and phosphorus2015In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 390, no 1-2, p. 323-335Article in journal (Refereed)
    Abstract [en]

    Aims

    To estimate the production of external ectomycorrhizal mycelia (EMM) in Norway spruce forests with varying nitrogen (N) and phosphorus (P) levels, and to relate this to the N retention capacity of ectomycorrhizal fungi (EMF) and N leaching.

    Methods

    Seasonal changes in EMF production (in ingrowth mesh bags) and soil water N (in suction lysimeters) were analyzed after fertilization with N or N combined with P. The EMF N retention capacity was estimated by the addition of isotopically labeled N to the mesh bags.

    Results

    No relationship was found between the seasonal variation in EMF growth and N leakage from the soil. However, in the mesh bags, the total assimilation of 15N by EMF was almost halved by N fertilization, while twice as much 15N leached through.

    Conclusions

    We found a high specific N assimilation capacity per unit weight of EMF mycelia. This was unaffected by N fertilization, but the total assimilation of N by EMF was drastically reduced due to reduced production of EMM. However, N-retaining processes other than N assimilation by EMF must be taken into account to explain the losses of N after fertilization.

  • 2.
    Brun, Christian
    et al.
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Åström, Mats
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Peltola, Pasi
    University of Kalmar, School of Pure and Applied Natural Sciences.
    Johansson, Maj-Britt
    Trends in major and trace elements in decomposing needle litters during a long-term experiment in Swedish forests2008In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Plant and Soil, Vol. 306Article in journal (Refereed)
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