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Nitrogen leaching and ectomycorrhizal nitrogen retention capacity in a Norway spruce forest fertilized with nitrogen and phosphorus
Lund University, Sweden.
Lund University, Sweden.
Linnaeus University, Faculty of Technology, Department of Forestry and Wood Technology.
Lund University, Sweden.
2015 (English)In: Plant and Soil, ISSN 0032-079X, E-ISSN 1573-5036, Vol. 390, no 1-2, p. 323-335Article in journal (Refereed) Published
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.

Place, publisher, year, edition, pages
2015. Vol. 390, no 1-2, p. 323-335
National Category
Forest Science
Research subject
Technology (byts ev till Engineering), Forestry and Wood Technology
Identifiers
URN: urn:nbn:se:lnu:diva-42063DOI: 10.1007/s11104-015-2408-6ISI: 000353476200023Scopus ID: 2-s2.0-84939981579OAI: oai:DiVA.org:lnu-42063DiVA, id: diva2:801850
Available from: 2015-04-10 Created: 2015-04-09 Last updated: 2017-12-04Bibliographically approved

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Bergh, Johan

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CiteExportLink to record
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Citation style
  • apa
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  • nn-NB
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  • Other locale
More languages
Output format
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  • asciidoc
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