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Microscale heterogeneity of acidity related stress-parameters in the soil solution of a forested cambic podzol

Titelangaben

Göttlein, Axel ; Matzner, Egbert:
Microscale heterogeneity of acidity related stress-parameters in the soil solution of a forested cambic podzol.
In: Plant and Soil. Bd. 192 (1997) Heft 1 . - S. 95-105.
ISSN 1573-5036
DOI: https://doi.org/10.1023/A:1004260006503

Abstract

Acid related stress in soils might be caused by high concentrations of H+ and Al3+ in soil solution. Sampling of soilsolution so far integrates over a relatively large soil volume, in the range of dm3. In order to study the microscaleheterogeneity of acidity related stress-parameters the soil profile of a podzolic cambisol was covered by a 106matrix of micro suction cups with a grid distance of 2 cm. The soil solution collected at 10 sampling events wasanalyzed for free cations and anions by capillary electrophoresis and for total metal content by a micro injectiontechnique on ICP-OES. pH and UV absorption were also measured.There was a general trend of increasing pH and decreasing UV absorption with increasing soil depth, howeverwithout a clear correlation of concentration isolines to soil horizon borders. The latter was also true for total Al(Altot) and Al3+, with the exception of the soil horizon border Ahe/Bh,which was very well reflected by Al3+ andalso by the fraction of bound Al. In the Ahe horizon less than 30%, in deeper mineral soil less than 50% of Altotwere present as free Al3+. This fact is critical when calculating Ca/Al ratios as a stress parameter, because totalmetal content measured by ICP clearly overestimates the risk of root damage, even in deeper horizons of acidforest soils, where organic complexation of Al is of minor importance. The heterogeneity of soil solution chemistryand toxicity parameters on the cm-scale was found to be significant, for example with gradients of more than 0,5pH-units within 2 cm. Because plant roots also experience soil on a microscale, high resolution investigations ofsoil solution chemistry offer a new approach for looking at the chemical environment relevant for root growth andplant nutrition.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER6898
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Egbert Matzner
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: 13 Aug 2015 06:12
Letzte Änderung: 13 Aug 2015 06:12
URI: https://eref.uni-bayreuth.de/id/eprint/18082