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Nitrogen leaching and ectomycorrhizal nitrogen retention capacity in a Norway spruce forest fertilized with nitrogen and phosphorus

Bahr, Adam LU ; Ellström, Magnus LU ; Bergh, Johan and Wallander, Håkan LU (2015) In Plant and Soil 390(1-2). p.323-335
Abstract
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. 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. 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 N-15 by EMF was almost halved by N fertilization, while twice as much N-15 leached... (More)
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. 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. 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 N-15 by EMF was almost halved by N fertilization, while twice as much N-15 leached through. 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
leaching, Nitrogen retention, Phosphorus, Ectomycorrhiza, Nitrogen, Mycelium, Norway spruce
in
Plant and Soil
volume
390
issue
1-2
pages
323 - 335
publisher
Springer
external identifiers
  • wos:000353476200023
  • scopus:84939981579
ISSN
0032-079X
DOI
10.1007/s11104-015-2408-6
project
MICCS - Molecular Interactions Controlling soil Carbon Sequestration
language
English
LU publication?
yes
id
acacc588-6bf9-4744-b15b-99ebe1874f6c (old id 5386147)
date added to LUP
2015-05-18 15:02:26
date last changed
2017-10-08 04:03:39
@article{acacc588-6bf9-4744-b15b-99ebe1874f6c,
  abstract     = {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. 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. 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 N-15 by EMF was almost halved by N fertilization, while twice as much N-15 leached through. 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.},
  author       = {Bahr, Adam and Ellström, Magnus and Bergh, Johan and Wallander, Håkan},
  issn         = {0032-079X},
  keyword      = {leaching,Nitrogen retention,Phosphorus,Ectomycorrhiza,Nitrogen,Mycelium,Norway spruce},
  language     = {eng},
  number       = {1-2},
  pages        = {323--335},
  publisher    = {Springer},
  series       = {Plant and Soil},
  title        = {Nitrogen leaching and ectomycorrhizal nitrogen retention capacity in a Norway spruce forest fertilized with nitrogen and phosphorus},
  url          = {http://dx.doi.org/10.1007/s11104-015-2408-6},
  volume       = {390},
  year         = {2015},
}