FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS

This study investigated the different forms and availability of P in soil profiles from temperate forests in southern Chile (two sites: Nothofagus obliqua (Mirb.) Bl. and Nothofagus betuloides (Mirb.) Oerst.) and Flanders, Belgium (two sites: Pinus nigra Arnold and Betula pendula Roth). Soils were s...

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Autores principales:	Brouwere,Katleen De, Thijs,Ann, Hens,Maarten, Merckx,Roel
Lenguaje:	English
Publicado:	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción 2003
Materias:	Andosols phosphorus availability podzols
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100004
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spelling	oai:scielo:S0717-664320030001000042004-02-04FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERSBrouwere,Katleen DeThijs,AnnHens,MaartenMerckx,Roel Andosols phosphorus availability podzols This study investigated the different forms and availability of P in soil profiles from temperate forests in southern Chile (two sites: Nothofagus obliqua (Mirb.) Bl. and Nothofagus betuloides (Mirb.) Oerst.) and Flanders, Belgium (two sites: Pinus nigra Arnold and Betula pendula Roth). Soils were sampled according to genetic horizonation and analysed for organic matter, oxalate-extractable P, Al and Fe, total inorganic P and total organic P. Phosphorus availability was assessed using an isotopic exchange technique and anion exchange membranes. The total P content was higher for the Chilean andosols and remained relatively high in the whole soil profile (1413-187 mg P kg-1) whereas total P decreased sharply in the lower horizons of the Flemish podzols (575-4 mg P kg-1). There was a strong predominance of organic P in the Chilean soils (up to 90% of total P). The high volcanic activity in Chile is responsible for the large amounts of allophone, which entail high P-fixing capacities in these soils. Notwithstanding the much larger total P content in Chilean andosols compared to the Flemish podzols, both soil types feature comparable amounts of available P (AEM-P). The two phosphorus availability indices (IEP and AEM-P) correlated rather well for the Flemish forest sites (R² = 0.67), while the same correlation was lacking for the Chilean soil profiles (R² = 0.11). However, a strong relation between AEM-P and the organic matter content of the andosols emerged. The presence of Al and DOC in the AEM-extracts of eight selected Chilean soil samples suggests the extraction of organo-mineral colloids by the membrane. The lack of correlation between AEM-P and IEP for the Chilean soils may be related to the presence of these colloids, as they may lead to an overestimation of IEP as well as biased AEM-P values. Differences in forms and availability of phosphorus between the Chilean and the Flemish soil profiles were mostly ascribed to differences in soil properties rather than to differences in anthropogenic influencesinfo:eu-repo/semantics/openAccessFacultad de Ciencias Naturales y Oceanográficas, Universidad de ConcepciónGayana. Botánica v.60 n.1 20032003-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100004en10.4067/S0717-66432003000100004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Andosols phosphorus availability podzols
spellingShingle	Andosols phosphorus availability podzols Brouwere,Katleen De Thijs,Ann Hens,Maarten Merckx,Roel FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
description	This study investigated the different forms and availability of P in soil profiles from temperate forests in southern Chile (two sites: Nothofagus obliqua (Mirb.) Bl. and Nothofagus betuloides (Mirb.) Oerst.) and Flanders, Belgium (two sites: Pinus nigra Arnold and Betula pendula Roth). Soils were sampled according to genetic horizonation and analysed for organic matter, oxalate-extractable P, Al and Fe, total inorganic P and total organic P. Phosphorus availability was assessed using an isotopic exchange technique and anion exchange membranes. The total P content was higher for the Chilean andosols and remained relatively high in the whole soil profile (1413-187 mg P kg-1) whereas total P decreased sharply in the lower horizons of the Flemish podzols (575-4 mg P kg-1). There was a strong predominance of organic P in the Chilean soils (up to 90% of total P). The high volcanic activity in Chile is responsible for the large amounts of allophone, which entail high P-fixing capacities in these soils. Notwithstanding the much larger total P content in Chilean andosols compared to the Flemish podzols, both soil types feature comparable amounts of available P (AEM-P). The two phosphorus availability indices (IEP and AEM-P) correlated rather well for the Flemish forest sites (R² = 0.67), while the same correlation was lacking for the Chilean soil profiles (R² = 0.11). However, a strong relation between AEM-P and the organic matter content of the andosols emerged. The presence of Al and DOC in the AEM-extracts of eight selected Chilean soil samples suggests the extraction of organo-mineral colloids by the membrane. The lack of correlation between AEM-P and IEP for the Chilean soils may be related to the presence of these colloids, as they may lead to an overestimation of IEP as well as biased AEM-P values. Differences in forms and availability of phosphorus between the Chilean and the Flemish soil profiles were mostly ascribed to differences in soil properties rather than to differences in anthropogenic influences
author	Brouwere,Katleen De Thijs,Ann Hens,Maarten Merckx,Roel
author_facet	Brouwere,Katleen De Thijs,Ann Hens,Maarten Merckx,Roel
author_sort	Brouwere,Katleen De
title	FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
title_short	FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
title_full	FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
title_fullStr	FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
title_full_unstemmed	FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS
title_sort	forms and availability of soil phosphorus in temperate forests in southern chile and flanders
publisher	Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción
publishDate	2003
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432003000100004
work_keys_str_mv	AT brouwerekatleende formsandavailabilityofsoilphosphorusintemperateforestsinsouthernchileandflanders AT thijsann formsandavailabilityofsoilphosphorusintemperateforestsinsouthernchileandflanders AT hensmaarten formsandavailabilityofsoilphosphorusintemperateforestsinsouthernchileandflanders AT merckxroel formsandavailabilityofsoilphosphorusintemperateforestsinsouthernchileandflanders
_version_	1718442209671380992

FORMS AND AVAILABILITY OF SOIL PHOSPHORUS IN TEMPERATE FORESTS IN SOUTHERN CHILE AND FLANDERS

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