NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE

Forest structure and tree species can have a significant impact on total atmospheric nitrogen (N) deposition; for example, deciduous forests have higher N requirements than coniferous forests. However, knowledge about the effect of the conversion of native Chilean vegetation cover by exotic plantati...

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Autores principales:	Oyarzún,Carlos, Godoy,Roberto, Staelens,Jeroen, Aracena,Claudia, Proschle,Juan
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2005
Materias:	Ammonium infiltration nitrate soil percolation throughfall
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200004
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spelling	oai:scielo:S0717-664320050002000042006-03-22NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILEOyarzún,CarlosGodoy,RobertoStaelens,JeroenAracena,ClaudiaProschle,Juan Ammonium infiltration nitrate soil percolation throughfall Forest structure and tree species can have a significant impact on total atmospheric nitrogen (N) deposition; for example, deciduous forests have higher N requirements than coniferous forests. However, knowledge about the effect of the conversion of native Chilean vegetation cover by exotic plantations on N cycling is scarce. The aim of this study was to determine the effect of the replacement of a Nothofagus obliqua native forest by a Pinus radiata plantation in southern Chile on the chemistry of throughfall, stemflow, soil water infiltration and percolation. Pinus radiata stemflow was more acidic (pH 4.7) than precipitation (pH 5.2) and throughfall (pH 5.6), while in the Nothofagus forest stemflow and throughfall pH were 6.3 and 6.1, respectively. In the Nothofagus forest, the soil water infiltration and percolation at 150 cm depth pH were 6.2 and 6.3, while in the Pinus plantation pH were 5.9 and 6.0, respectively. Throughfall and stemflow were enriched in DIN (NH4+-N + NO3--N) and DON in both forests. DIN fluxes were higher in throughfall in the Nothofagus forest (7.5 kg ha-1 yr-1) than in the Pinus plantation (6.4 kg ha-1 yr-1). DIN infiltration fluxes were much higher in the Pinus plantation (NH4+-N = 3.1 kg ha-1 yr-1, NO3--N = 5.4 kg ha-1 yr-1) than in the Nothofagus forest (NH4+-N = 0.4 kg ha-1 yr-1, NO3--N = 1.5 kg ha-1 yr-1), suggesting a lower N immobilization and/or plant uptake in the Pinus plantationinfo: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=S0717-66432005000200004en10.4067/S0717-66432005000200004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Ammonium infiltration nitrate soil percolation throughfall
spellingShingle	Ammonium infiltration nitrate soil percolation throughfall Oyarzún,Carlos Godoy,Roberto Staelens,Jeroen Aracena,Claudia Proschle,Juan NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
description	Forest structure and tree species can have a significant impact on total atmospheric nitrogen (N) deposition; for example, deciduous forests have higher N requirements than coniferous forests. However, knowledge about the effect of the conversion of native Chilean vegetation cover by exotic plantations on N cycling is scarce. The aim of this study was to determine the effect of the replacement of a Nothofagus obliqua native forest by a Pinus radiata plantation in southern Chile on the chemistry of throughfall, stemflow, soil water infiltration and percolation. Pinus radiata stemflow was more acidic (pH 4.7) than precipitation (pH 5.2) and throughfall (pH 5.6), while in the Nothofagus forest stemflow and throughfall pH were 6.3 and 6.1, respectively. In the Nothofagus forest, the soil water infiltration and percolation at 150 cm depth pH were 6.2 and 6.3, while in the Pinus plantation pH were 5.9 and 6.0, respectively. Throughfall and stemflow were enriched in DIN (NH4+-N + NO3--N) and DON in both forests. DIN fluxes were higher in throughfall in the Nothofagus forest (7.5 kg ha-1 yr-1) than in the Pinus plantation (6.4 kg ha-1 yr-1). DIN infiltration fluxes were much higher in the Pinus plantation (NH4+-N = 3.1 kg ha-1 yr-1, NO3--N = 5.4 kg ha-1 yr-1) than in the Nothofagus forest (NH4+-N = 0.4 kg ha-1 yr-1, NO3--N = 1.5 kg ha-1 yr-1), suggesting a lower N immobilization and/or plant uptake in the Pinus plantation
author	Oyarzún,Carlos Godoy,Roberto Staelens,Jeroen Aracena,Claudia Proschle,Juan
author_facet	Oyarzún,Carlos Godoy,Roberto Staelens,Jeroen Aracena,Claudia Proschle,Juan
author_sort	Oyarzún,Carlos
title	NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
title_short	NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
title_full	NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
title_fullStr	NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
title_full_unstemmed	NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE
title_sort	nitrogen fluxes in a nothofagus obliqua forest and a pinus radiata plantation in the central valley of southern chile
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2005
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200004
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_version_	1718442222004731904

NITROGEN FLUXES IN A NOTHOFAGUS OBLIQUA FOREST AND A PINUS RADIATA PLANTATION IN THE CENTRAL VALLEY OF SOUTHERN CHILE

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