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Hantschel, R.E. ; Kaupenjohann, M. ; Horn, R. ; Gradl, J. ; Zech, W.

Ecologically Important Differences between Equilibrium and Percolation Soil Extracts, Bavaria.

Geoderma 43, 213-227 (1988)
DOI
Open Access Green as soon as Postprint is submitted to ZB.
The chemical composition of saturation extracts (equilibrium soil solutions) from bulk samples (sieved and mixed) were compared with that of solutions obtained by percolating water through undisturbed cores of A horizons of five profiles and of B and C horizons of one profile in northeastern Bavaria. Solutions obtained by percolation contained larger amounts of protons and acidic cations (H+, Al3+, Fe2+) and smaller amounts of base cations (Ca2+, Mg2+, K+, Na+) than the saturation extracts. Differences were large enough to be statistically significant. These differences are attributed to distinctions in surfaces exposed to the extracting solutions, in exchange processes and in fluxes of elements out of aggregates. Because it works with undisturbed soil samples the percolation method is proposed as more realistic for identification of the chemical composition of soil solutions than the saturation extracts. The information thus obtained should provide better indications of conditions affecting root growth, nutrient uptake and seepage composition in soil horizons.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0016-7061
e-ISSN 1872-6259
Journal Geoderma
Quellenangaben Volume: 43, Issue: 2-3, Pages: 213-227 Article Number: , Supplement: ,
Publisher Elsevier
Reviewing status Peer reviewed
Institute(s) Institute of Biochemical Plant Pathology (BIOP)