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Effects of changes in pH, ionic strength, and sulphate concentration on the CEC of temperate acid forest soils

Titelangaben

Matschonat, Gunda ; Vogt, Robert:
Effects of changes in pH, ionic strength, and sulphate concentration on the CEC of temperate acid forest soils.
In: European Journal of Soil Science. Bd. 48 (1997) Heft 1 . - S. 163-171.
ISSN 1351-0754
DOI: https://doi.org/10.1111/j.1365-2389.1997.tb00195.x

Abstract

As the acidity of rain diminishes, changes in the pH, ionic strength, and ion activities of the soilsolution will influence the charge characteristics of soil. We have investigated the response ofcation exchange capacity (CEC) of three acid forest soils of variable charge to small changes in pH,ionic strength, and SO:- concentration. The variable charge for these temperate soils has the samesignificance as for tropical soils and those from volcanic ash. Maximum absolute increase in CECon increasing pH by 0.2-0.5 units reached 5 cmol, kg-' in 0 horizons. The increase in CEC ondoubling ionic strength in EA and Bsh horizons of a Cambic Podzol was about half that amount,but relative gains compared to effective CEC were 65 and 46%, respectively. For other soilhorizons, absolute changes were smaller, and relative changes were between 10 and 30%. Halvingthe SO:- concentration significantly influenced CEC only in some samples. Both pH and ionicstrength must be adjusted with care when determining CEC, of acid forest soils. Decreasing aciddeposition will not inevitably increase CEC, , because in some soils pH effects may be balanced bysimultaneous decrease in ionic strength.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER6896
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 22 Okt 2015 07:29
Letzte Änderung: 22 Okt 2015 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/20737