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Equilibrium solution composition and exchange properties of disturbed and undisturbed soil samples from an acid forest soil

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Matschonat, Gunda ; Vogt, Robert:
Equilibrium solution composition and exchange properties of disturbed and undisturbed soil samples from an acid forest soil.
In: Plant and Soil. Bd. 183 (1996) Heft 2 . - S. 171-179.
ISSN 1573-5036
DOI: https://doi.org/10.1007/BF00011432

Abstract

Microscalic heterogeneity of soil chemical properties caused by soil structure has been reported for several soils.We investigated exchange properties and soil solution composition of disturbed and undisturbed samples of anacid forest soil lacking visible structure. Cation concentrations in the soil solution resulting from two extractionprocedures and two analytical methods were compared. The effective cation exchange capacity (CECe) of theundisturbed sample represented 56~59% of the bulk soil CECe. Base saturation of undisturbed samples equalledthat of disturbed samples for EA, Bhs, and Bsh horizons, and was higher for the Bw horizon. Contradicting theresults of other authors, soil pore solution obtained by percolating soil cores under conditions of low water tensionoffered more favourable conditions for plant roots when compared to the equilibrium soil solution of the bulk soilsample in all except the Bsh horizon. CaZ+/A13+ molar ratios were higher and fractions of H + + AI 3+ on totalcationic charge were lower in the soil pore solution. These results were obtained employing soil:solution ratios ofabout 1:0.5 during the extraction of soil pore solution, and by determination of free cations. Other authors used awater extraction with soil:solution ratios up to 1:2 and took total metal for ion concentrations. The combinationof the latter extraction and analytical method in our study, too, led to unfavourable CaZ+/Al 3+ ratios and highfractions of H + + AI 3+. The choice of analytical and extraction method are thus decisive for the valuation of thesoil solution composition in view of plant nutrition.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER6897
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/20758