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

Title data

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. Vol. 48 (1997) Issue 1 . - pp. 163-171.
ISSN 1351-0754
DOI: https://doi.org/10.1111/j.1365-2389.1997.tb00195.x

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER6896
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 22 Oct 2015 07:29
Last Modified: 22 Oct 2015 07:29
URI: https://eref.uni-bayreuth.de/id/eprint/20737