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The effect of organic acids on base cation leaching from forest floor under six north American tree species
Laboratory of Soil Science and Geology, PO Box 37, 6700 AA Wageningen, PAYS-BAS.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
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2001 (English)In: European Journal of Soil Science, ISSN 1351-0754, E-ISSN 1365-2389, Vol. 52, no 2, 205-214 p.Article in journal (Refereed) Published
Abstract [en]

Organic acidity and its degree of neutralization in the forest floor can have large consequences for base cation leaching under different tree species. We investigated the effect of organic acids on base cation leaching from the forest floor under six common North American tree species. Forest floor samples were analysed for exchangeable cations and forest floor solutions for cations, anions, simple organic acids and acidic properties. Citric and lactic acid were the most common of the acids under all species. Malonic acid was found mainly under Tsuga canadensis (hemlock) and Fagus grandifolia (beech). The organic acids were positively correlated with dissolved organic carbon and contributed significantly to the organic acidity of the solution (up to 26%). Forest floor solutions under Tsuga canadensis contained the most dissolved C and the most weak acidity among the six tree species. Under Tsuga canadensis we also found significant amounts of strong acidity caused by deposition of sulphuric acid from the atmosphere and by strong organic acids. Base cation exchange was the most important mechanism by which acidity was neutralized. Organic acids in solution from Tsuga canadensis, Fagus grandifolia, Acer rubrum (red maple) and Quercus rubra (red oak) were hardly neutralized while much more organic acidity was neutralized for Acer saccharum (sugar maple) and Fraxinus americana (white ash). We conclude that quantity, nature and degree of neutralization of organic acids differ among the different tree species. While the potential for base cation leaching with organic acids from the forest floor is greatest under Tsuga canadensis, actual leaching with organic anions is greatest under Acer saccharum and Fraxinus americana under which the forest floor contains more exchangeable cations than does the strongly acidified forest floor under Tsuga canadensis.

Place, publisher, year, edition, pages
2001. Vol. 52, no 2, 205-214 p.
Keyword [en]
organic acids
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-2430DOI: 10.1046/j.1365-2389.2001.00369.xISI: 000169353400003Scopus ID: 2-s2.0-0012059665Local ID: 1620OAI: oai:DiVA.org:miun-2430DiVA: diva2:27462
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2016-10-08Bibliographically approved
In thesis
1. Organic acids and siderophores in forest soil solution
Open this publication in new window or tab >>Organic acids and siderophores in forest soil solution
2003 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2003
Series
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 0
Keyword
acidification, aluminium, ash treatment, canopy tree, column switching, coniferous, DOC, HPLC-MC, hydroxamate, liming, low molecular weight, organic acids, podzol, porous graphitic carbon, siderophore, soil solution
National Category
Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-8904 (URN)91-87908-76-X (ISBN)
Public defence
2003-12-05, Sundsvall, 13:00 (English)
Available from: 2009-05-07 Created: 2009-05-07 Last updated: 2017-03-16Bibliographically approved
2. Effects on soil solution chemistry caused by sampling method, soil treatment and vegetation
Open this publication in new window or tab >>Effects on soil solution chemistry caused by sampling method, soil treatment and vegetation
2005 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mittuniversitetet, 2005. 39 p.
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 3
Keyword
acidification, centrifugation, lime, lysimeter, podzol, sampling method, soil solution, tree species, wood-ash
National Category
Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-8910 (URN)91-85317-02-0 (ISBN)
Presentation
(English)
Available from: 2009-05-11 Created: 2009-05-11 Last updated: 2011-04-06Bibliographically approved

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Citation style
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