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Recovery from N saturation in Flemish forests under high N deposition

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Recovery from N saturation in Flemish forests under high N deposition. / Verstraeten, Arne; Neirynck, Johan; Cools, Nathalie; Roskams, Peter; Hens, Maarten.

2014. Paper gepresenteerd op 3rd ICP Forests Scientific Conference, Athene, Griekenland.

Onderzoeksoutput: Bijdrage aan congresPaper/Powerpoint/Abstract

Harvard

Verstraeten, A, Neirynck, J, Cools, N, Roskams, P & Hens, M 2014, 'Recovery from N saturation in Flemish forests under high N deposition', Paper gepresenteerd op 3rd ICP Forests Scientific Conference, Athene, Griekenland, 26/05/14 - 28/05/14.

APA

Verstraeten, A., Neirynck, J., Cools, N., Roskams, P., & Hens, M. (2014). Recovery from N saturation in Flemish forests under high N deposition. Paper gepresenteerd op 3rd ICP Forests Scientific Conference, Athene, Griekenland.

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Bibtex

@conference{ba3cb9c032a841068cc57b304157943a,
title = "Recovery from N saturation in Flemish forests under high N deposition",
abstract = "The objective of this study was to evaluate the recovery from nitrogen (N) saturation in forests under high N deposition in Flanders, northern Belgium. Deposition and soil solution concentrations of inorganic nitrogen (DIN) and total N were measured at five ICP Forests intensive monitoring plots (1 Pinus sylvestris, 1 P. nigra subsp. laricio, 2 Fagus sylvatica and 1 mixed F. sylvatica – Quercus robur) from 1996 till 2013 (DIN) and from 2005 till 2013 (total N). Deposition and soil solution concentrations of organic nitrogen (DON) were calculated as total N - DIN. The sodium mass balance approach was used to calculate N fluxes through the soil. In 1996 all forests were strongly N saturated, indicated by year-round elevated nitrate (NO3-) leaching. Despite an overall decrease of DIN depositions, DIN + DON depositions still amounted to 22-32 kg N ha-1 y-1 in 2013. This coincided with a decline of NO3--leaching, and an increase of the DON/DIN ratio in deposition and soil solution. Though, the recovery rates varied among the plots. In the two beech plots NO3--leaching decreased rapidly around 2004. Coniferous plots showed a more gradual recovery, with actual NO3--concentrations below 2 mg N l-1 in the deeper mineral soil during most part of the year. Only the mixed oak-beech plot remained highly N saturated, probably due to elevated humus desintegration in the mineral topsoil. This study points out that chemical recovery of forest soil solution could also be expected under high N deposition, and that NO3--leaching may cease rapidly when the retention capacity of the forest ecosystem is no longer exceeded.",
author = "Arne Verstraeten and Johan Neirynck and Nathalie Cools and Peter Roskams and Maarten Hens",
year = "2014",
month = "5",
day = "27",
language = "English",
note = "null ; Conference date: 26-05-2014 Through 28-05-2014",

}

RIS

TY - CONF

T1 - Recovery from N saturation in Flemish forests under high N deposition

AU - Verstraeten, Arne

AU - Neirynck, Johan

AU - Cools, Nathalie

AU - Roskams, Peter

AU - Hens, Maarten

PY - 2014/5/27

Y1 - 2014/5/27

N2 - The objective of this study was to evaluate the recovery from nitrogen (N) saturation in forests under high N deposition in Flanders, northern Belgium. Deposition and soil solution concentrations of inorganic nitrogen (DIN) and total N were measured at five ICP Forests intensive monitoring plots (1 Pinus sylvestris, 1 P. nigra subsp. laricio, 2 Fagus sylvatica and 1 mixed F. sylvatica – Quercus robur) from 1996 till 2013 (DIN) and from 2005 till 2013 (total N). Deposition and soil solution concentrations of organic nitrogen (DON) were calculated as total N - DIN. The sodium mass balance approach was used to calculate N fluxes through the soil. In 1996 all forests were strongly N saturated, indicated by year-round elevated nitrate (NO3-) leaching. Despite an overall decrease of DIN depositions, DIN + DON depositions still amounted to 22-32 kg N ha-1 y-1 in 2013. This coincided with a decline of NO3--leaching, and an increase of the DON/DIN ratio in deposition and soil solution. Though, the recovery rates varied among the plots. In the two beech plots NO3--leaching decreased rapidly around 2004. Coniferous plots showed a more gradual recovery, with actual NO3--concentrations below 2 mg N l-1 in the deeper mineral soil during most part of the year. Only the mixed oak-beech plot remained highly N saturated, probably due to elevated humus desintegration in the mineral topsoil. This study points out that chemical recovery of forest soil solution could also be expected under high N deposition, and that NO3--leaching may cease rapidly when the retention capacity of the forest ecosystem is no longer exceeded.

AB - The objective of this study was to evaluate the recovery from nitrogen (N) saturation in forests under high N deposition in Flanders, northern Belgium. Deposition and soil solution concentrations of inorganic nitrogen (DIN) and total N were measured at five ICP Forests intensive monitoring plots (1 Pinus sylvestris, 1 P. nigra subsp. laricio, 2 Fagus sylvatica and 1 mixed F. sylvatica – Quercus robur) from 1996 till 2013 (DIN) and from 2005 till 2013 (total N). Deposition and soil solution concentrations of organic nitrogen (DON) were calculated as total N - DIN. The sodium mass balance approach was used to calculate N fluxes through the soil. In 1996 all forests were strongly N saturated, indicated by year-round elevated nitrate (NO3-) leaching. Despite an overall decrease of DIN depositions, DIN + DON depositions still amounted to 22-32 kg N ha-1 y-1 in 2013. This coincided with a decline of NO3--leaching, and an increase of the DON/DIN ratio in deposition and soil solution. Though, the recovery rates varied among the plots. In the two beech plots NO3--leaching decreased rapidly around 2004. Coniferous plots showed a more gradual recovery, with actual NO3--concentrations below 2 mg N l-1 in the deeper mineral soil during most part of the year. Only the mixed oak-beech plot remained highly N saturated, probably due to elevated humus desintegration in the mineral topsoil. This study points out that chemical recovery of forest soil solution could also be expected under high N deposition, and that NO3--leaching may cease rapidly when the retention capacity of the forest ecosystem is no longer exceeded.

M3 - Paper/Powerpoint/Abstract

ER -

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