Saturation of raised bog peat exchange sites by Pb super(2+) and Al super(3+) stimulates CH sub(4) production

We examined the effect of cation treatments on methanogenic activity and nutrient release from exchange sites in raised bog and fen peats. Treatments consisted of cation chloride solutions (MgCl sub(2), AlCl sub(3) and PbCl sub(2)) applied individually. In raised bog peat Al super(3+) and Pb super(2...

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Bibliographic Details
Published in:Soil biology & biochemistry 2009-09, Vol.41 (9), p.2025-2028
Main Authors: Gogo, Sebastien, Pearce, Deborah ME
Format: Article
Language:English
Online Access:Get full text
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Summary:We examined the effect of cation treatments on methanogenic activity and nutrient release from exchange sites in raised bog and fen peats. Treatments consisted of cation chloride solutions (MgCl sub(2), AlCl sub(3) and PbCl sub(2)) applied individually. In raised bog peat Al super(3+) and Pb super(2+) increased CH sub(4) production. A correlation was found between CH sub(4) production and the amount of micro- and macronutrient cations released by the treatments. In calcareous fen peat, such a stimulation was also found, but there was no correlation between CH sub(4) production and micro and macronutrient release. Direct nutrient and pH effects could not account for these observations. Thus the results support the hypothesis that the methanogenic community in the raised bog is limited by the availability of mineral nutrients and/or inactivity of exo- enzymes, both of which are bound onto exchange sites.
ISSN:0038-0717
DOI:10.1016/j.soilbio.2009.07.015