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

Title data

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. Vol. 183 (1996) Issue 2 . - pp. 171-179.
ISSN 1573-5036
DOI: https://doi.org/10.1007/BF00011432

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER6897
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/20758