NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION

Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or c...

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Autores principales:	Boeckx,Pascal, Vervaet,Hilde, Cleemput,Oswald van
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2005
Materias:	Emission forest soil nitrogen cycling nitric oxide nitrous oxide
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003
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spelling	oai:scielo:S0717-664320050002000032006-03-22NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITIONBoeckx,PascalVervaet,HildeCleemput,Oswald van Emission forest soil nitrogen cycling nitric oxide nitrous oxide Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral soil only. In June 2000, the NO flux from the same location was 94.3 (± 14.1) and 53.8 (± 10.3) ng NO-N m-2 s-1, respectively, for the soil with organic layer and the mineral soil only. In April 2000, the NO emission from a clear-cut location in the same forest for the soil with organic layer was 30.5 (±1.52) ng NO-N m-2 s-1, whereas the flux from the mineral soil was 42.3 (± 1.33) ng NO-N m-2 s-1. In June 2000, however, the mineral soil emitted a significantly higher amount of NO than the clear-cut soil with organic layer (145.8 ± 7.2 ng NO-N m-2 s-1 versus 22.6 ± 3.1 ng NO-N m-2 s-1). The soil at the forested location acted as a net sink for N2O, with a mean annual flux of -0.63 ± 0.57 ng N2O-N m-2 s-1. In contrast the soil at the clear-cut site acted as a net N2O source, with a mean annual flux of 1.55 ± 0.90 ng N2O-N m-2 s-1. From these measurements it could be concluded that the forested soil was a significant secondary NO source and a N2O source or sink. However, more research is needed to investigate how N deposition, climate and forest management can affect N trace gas exchange in forest soilsinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana. Botánica v.62 n.2 20052005-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003en10.4067/S0717-66432005000200003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Emission forest soil nitrogen cycling nitric oxide nitrous oxide
spellingShingle	Emission forest soil nitrogen cycling nitric oxide nitrous oxide Boeckx,Pascal Vervaet,Hilde Cleemput,Oswald van NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
description	Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral soil only. In June 2000, the NO flux from the same location was 94.3 (± 14.1) and 53.8 (± 10.3) ng NO-N m-2 s-1, respectively, for the soil with organic layer and the mineral soil only. In April 2000, the NO emission from a clear-cut location in the same forest for the soil with organic layer was 30.5 (±1.52) ng NO-N m-2 s-1, whereas the flux from the mineral soil was 42.3 (± 1.33) ng NO-N m-2 s-1. In June 2000, however, the mineral soil emitted a significantly higher amount of NO than the clear-cut soil with organic layer (145.8 ± 7.2 ng NO-N m-2 s-1 versus 22.6 ± 3.1 ng NO-N m-2 s-1). The soil at the forested location acted as a net sink for N2O, with a mean annual flux of -0.63 ± 0.57 ng N2O-N m-2 s-1. In contrast the soil at the clear-cut site acted as a net N2O source, with a mean annual flux of 1.55 ± 0.90 ng N2O-N m-2 s-1. From these measurements it could be concluded that the forested soil was a significant secondary NO source and a N2O source or sink. However, more research is needed to investigate how N deposition, climate and forest management can affect N trace gas exchange in forest soils
author	Boeckx,Pascal Vervaet,Hilde Cleemput,Oswald van
author_facet	Boeckx,Pascal Vervaet,Hilde Cleemput,Oswald van
author_sort	Boeckx,Pascal
title	NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
title_short	NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
title_full	NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
title_fullStr	NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
title_full_unstemmed	NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION
title_sort	no and n2o fluxes from a belgian forest affected by elevated nitrogen deposition
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003
work_keys_str_mv	AT boeckxpascal noandn2ofluxesfromabelgianforestaffectedbyelevatednitrogendeposition AT vervaethilde noandn2ofluxesfromabelgianforestaffectedbyelevatednitrogendeposition AT cleemputoswaldvan noandn2ofluxesfromabelgianforestaffectedbyelevatednitrogendeposition
_version_	1718442221825425408

NO AND N2O FLUXES FROM A BELGIAN FOREST AFFECTED BY ELEVATED NITROGEN DEPOSITION

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