Soil acidification in permanent observation plots

Soil acidification is followed in Swiss forest observation plots differing in soil chemistry. Soil solution samples from suction cups show clearly increasing soil acidification between 1998 and 2011, although the rate has declined in many cases during the last five years. The most rapid decline is c...

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Bibliographic Details
Published inSchweizerische Zeitschrift für Forstwesen Vol. 163; no. 9
Main Authors Braun, S, Flückiger, W., Institut fuer Angewandte Pflanzenbiologie, Schoenenbuch (Switzerland)
Format Journal Article
LanguageGerman
Published 01.09.2012
Subjects
ACIDIFICACION
ACIDIFICATION
ALUMINIO
ALUMINIUM
BOSQUES
FORESTS
FORET
NITRATE
NITRATES
NITRATOS
PH DEL SUELO
PH DU SOL
SOIL PH
SOIL SOLUTION
SOLUCIONES DEL SUELO
SOLUTION DU SOL
SUISSE
SUIZA
SWITZERLAND
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Summary:Soil acidification is followed in Swiss forest observation plots differing in soil chemistry. Soil solution samples from suction cups show clearly increasing soil acidification between 1998 and 2011, although the rate has declined in many cases during the last five years. The most rapid decline is currently observed in plots with medium to high base saturation. Nitrogen addition experiments and time series after thinning out forests confirm the important role of nitrogen input and nitrate leaching for the acidification process. It is suggested that the slowdown of acidification since 2003 has several reasons: reaching of the aluminium buffer range in the very acidic plots, decreased nitrate leaching in a series of dry years, reduction of acid deposition.
Bibliography:P01
ISSN:0036-7818