Nitrogen balance of a boreal Scots pine forest

Janne Korhonen, Mari Pihlatie, Jukka Pumpanen, Hermanni Aaltonen, Pertti Hari, Janne Levula, Antti-Jussi Kieloaho, Eero Nikinmaa, Timo Vesala, Hannu Ilvesniemi

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

The productivity of boreal forests is considered to be limited by low nitrogen (N) availability. Increased atmospheric N deposition has altered the functioning and N cycling of these N-sensitive ecosystems by increasing the availability of reactive nitrogen. The most important components of N pools and fluxes were measured in a boreal Scots pine stand in Hyytiälä, Southern Finland. The measurements at the site allowed direct estimations of nutrient pools in the soil and biomass, inputs from the atmosphere and outputs as drainage flow and gaseous losses from two micro-catchments. N was accumulating in the system, mainly in woody biomass, at a rate of 7 kg N ha−1 yr−1. Nitrogen input as atmospheric deposition was 7.4 kg N ha−1 yr−1. Dry deposition and organic N in wet deposition contributed over half of the inputs in deposition. Total outputs were 0.4 kg N ha−1 yr−1, the most important outputs being N2O emission to the atmosphere and organic N flux in drainage flow. Nitrogen uptake and retranslocation were equally important sources of N for plant growth. Most of the assimilated N originated from decomposition of organic matter, and the fraction of N that could originate directly from deposition was about 30%. In conclusion, atmospheric N deposition fertilizes the site considerably, but there are no signs of N saturation. Further research is needed to estimate soil N2 fluxes (emission and fixation), which may amount up to several kg N ha−1 yr−1.
Originalspråkengelska
TidskriftBiogeosciences
Volym10
Sidor (från-till)1083-1095
Antal sidor13
ISSN1726-4170
DOI
StatusPublicerad - 2013
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 114 Fysik
  • 4112 Skogsvetenskap

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title = "Nitrogen balance of a boreal Scots pine forest",
abstract = "The productivity of boreal forests is considered to be limited by low nitrogen (N) availability. Increased atmospheric N deposition has altered the functioning and N cycling of these N-sensitive ecosystems by increasing the availability of reactive nitrogen. The most important components of N pools and fluxes were measured in a boreal Scots pine stand in Hyyti{\"a}l{\"a}, Southern Finland. The measurements at the site allowed direct estimations of nutrient pools in the soil and biomass, inputs from the atmosphere and outputs as drainage flow and gaseous losses from two micro-catchments. N was accumulating in the system, mainly in woody biomass, at a rate of 7 kg N ha−1 yr−1. Nitrogen input as atmospheric deposition was 7.4 kg N ha−1 yr−1. Dry deposition and organic N in wet deposition contributed over half of the inputs in deposition. Total outputs were 0.4 kg N ha−1 yr−1, the most important outputs being N2O emission to the atmosphere and organic N flux in drainage flow. Nitrogen uptake and retranslocation were equally important sources of N for plant growth. Most of the assimilated N originated from decomposition of organic matter, and the fraction of N that could originate directly from deposition was about 30{\%}. In conclusion, atmospheric N deposition fertilizes the site considerably, but there are no signs of N saturation. Further research is needed to estimate soil N2 fluxes (emission and fixation), which may amount up to several kg N ha−1 yr−1.",
keywords = "114 Physical sciences, 4112 Forestry",
author = "Janne Korhonen and Mari Pihlatie and Jukka Pumpanen and Hermanni Aaltonen and Pertti Hari and Janne Levula and Antti-Jussi Kieloaho and Eero Nikinmaa and Timo Vesala and Hannu Ilvesniemi",
year = "2013",
doi = "10.5194/bg-10-1083-2013",
language = "English",
volume = "10",
pages = "1083--1095",
journal = "Biogeosciences",
issn = "1726-4170",
publisher = "COPERNICUS GESELLSCHAFT MBH",

}

Nitrogen balance of a boreal Scots pine forest. / Korhonen, Janne; Pihlatie, Mari; Pumpanen, Jukka; Aaltonen, Hermanni; Hari, Pertti; Levula, Janne; Kieloaho, Antti-Jussi; Nikinmaa, Eero; Vesala, Timo; Ilvesniemi, Hannu.

I: Biogeosciences, Vol. 10, 2013, s. 1083-1095.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

TY - JOUR

T1 - Nitrogen balance of a boreal Scots pine forest

AU - Korhonen, Janne

AU - Pihlatie, Mari

AU - Pumpanen, Jukka

AU - Aaltonen, Hermanni

AU - Hari, Pertti

AU - Levula, Janne

AU - Kieloaho, Antti-Jussi

AU - Nikinmaa, Eero

AU - Vesala, Timo

AU - Ilvesniemi, Hannu

PY - 2013

Y1 - 2013

N2 - The productivity of boreal forests is considered to be limited by low nitrogen (N) availability. Increased atmospheric N deposition has altered the functioning and N cycling of these N-sensitive ecosystems by increasing the availability of reactive nitrogen. The most important components of N pools and fluxes were measured in a boreal Scots pine stand in Hyytiälä, Southern Finland. The measurements at the site allowed direct estimations of nutrient pools in the soil and biomass, inputs from the atmosphere and outputs as drainage flow and gaseous losses from two micro-catchments. N was accumulating in the system, mainly in woody biomass, at a rate of 7 kg N ha−1 yr−1. Nitrogen input as atmospheric deposition was 7.4 kg N ha−1 yr−1. Dry deposition and organic N in wet deposition contributed over half of the inputs in deposition. Total outputs were 0.4 kg N ha−1 yr−1, the most important outputs being N2O emission to the atmosphere and organic N flux in drainage flow. Nitrogen uptake and retranslocation were equally important sources of N for plant growth. Most of the assimilated N originated from decomposition of organic matter, and the fraction of N that could originate directly from deposition was about 30%. In conclusion, atmospheric N deposition fertilizes the site considerably, but there are no signs of N saturation. Further research is needed to estimate soil N2 fluxes (emission and fixation), which may amount up to several kg N ha−1 yr−1.

AB - The productivity of boreal forests is considered to be limited by low nitrogen (N) availability. Increased atmospheric N deposition has altered the functioning and N cycling of these N-sensitive ecosystems by increasing the availability of reactive nitrogen. The most important components of N pools and fluxes were measured in a boreal Scots pine stand in Hyytiälä, Southern Finland. The measurements at the site allowed direct estimations of nutrient pools in the soil and biomass, inputs from the atmosphere and outputs as drainage flow and gaseous losses from two micro-catchments. N was accumulating in the system, mainly in woody biomass, at a rate of 7 kg N ha−1 yr−1. Nitrogen input as atmospheric deposition was 7.4 kg N ha−1 yr−1. Dry deposition and organic N in wet deposition contributed over half of the inputs in deposition. Total outputs were 0.4 kg N ha−1 yr−1, the most important outputs being N2O emission to the atmosphere and organic N flux in drainage flow. Nitrogen uptake and retranslocation were equally important sources of N for plant growth. Most of the assimilated N originated from decomposition of organic matter, and the fraction of N that could originate directly from deposition was about 30%. In conclusion, atmospheric N deposition fertilizes the site considerably, but there are no signs of N saturation. Further research is needed to estimate soil N2 fluxes (emission and fixation), which may amount up to several kg N ha−1 yr−1.

KW - 114 Physical sciences

KW - 4112 Forestry

U2 - 10.5194/bg-10-1083-2013

DO - 10.5194/bg-10-1083-2013

M3 - Article

VL - 10

SP - 1083

EP - 1095

JO - Biogeosciences

JF - Biogeosciences

SN - 1726-4170

ER -