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Effects of lime and ash treatments on DOC fractions and low molecular weight organic acids in soil solutions of acidified podzolic soils
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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2003 (English)In: Water, Air and Soil Pollution, ISSN 0049-6979, E-ISSN 1573-2932, Vol. 3, no 4, 97-120 p.Article in journal (Refereed) Published
Abstract [en]

Dissolved organic carbon (DOC) fractions and different low molecular weight organic acids (LMWOAs) were determined in soil solutions from two lime or ash treated Norway spruce sites in the south of Sweden. At Hasslöv, 3.45 t ha-1 or 8.75 t ha-1 dolomite were applied 15 years before sampling. Horröd was treated with 4.28 t ha-1 ash and 3.25 t ha-1 dolomite and sampled four years later. Propionate (7–268 M) and malonate (2–34 M) were the LMWOAsfound in the highest concentrations at Hasslöv. Two other LMWOAs dominated at Horröd, namely citrate (18–64 M)and fumarate (5–31 M). The differences in concentration of most of the determined LMWOAs at Hasslöv were significantly increased due to treatment. The LMWOAs comprised between 1.1–6.3% of the DOC at Hasslöv and 4.5–17.6% at Horröd. At Hasslöv normally 3–10% of the total acidity (TA) was due to LMWOAs and the average specific buffer capacity was 74 ± 22 mmol mol-1C.The total DOC concentration in the mor layer solution was 16 mM for the dolomite treated plots compared to 10 mM at the untreated plot. A major part of the increase in DOC at the treated plots apparently had a hydrophobic character and was of high molecular weight corresponding to 3–10 kDa. The concentration of DOC < 1 kDa in the control and treated plots was similar.

Place, publisher, year, edition, pages
2003. Vol. 3, no 4, 97-120 p.
Keyword [en]
acidification - hydrophobicity - lime - low molecular weight - organic acids - organic matter - size distribution - soil solution - wood ash
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:miun:diva-2427DOI: 10.1023/A:1024175430032Local ID: 1617OAI: oai:DiVA.org:miun-2427DiVA: diva2:27459
Available from: 2008-09-30 Created: 2008-12-16 Last updated: 2011-04-19Bibliographically 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

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Holmström, SaraGeibe, ChristineVan Hees, PatrickLundström, Ulla
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