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“Mobile Fraktionen” von Spurenelementen (Be, Cu, Cd, Co, Pb, V, Zn) in Böden des Bärhaldegranitgebietes
Author(s) -
Keilen Karl,
Stahr Karl,
Zöttl Heinz W.
Publication year - 1978
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19781410508
Subject(s) - chemistry , cadmium , zinc , soil water , leaching (pedology) , subsoil , environmental chemistry , podzol , geology , organic chemistry , soil science
“Mobile fractions” of trace elements (Be, Cu, Cd, Co, Pb, V, Zn) in soils of the Bärhalde‐granite area 0.01 n NH 4 OH is suitable for extracting the „mobile fraction” of trace elements. Along with the exchangeable fraction, organically bound components are predominantly extracted from the top soil, while in the subsoil, the oxide fraction is mainly extracted. An average of 80–90% of the extract is composed of organic substances and Al and Fe hydroxides. Pb and Cd in the soil primarily stem from airborne immissions. Zn, V, Cd, Co and Cu are to a great extent incorporated into the organic cycle. All investigated trace elements are more or less subjected to podzolization, wet leaching, and slope gleying processes. Here the tendency for the re‐enrichment of Zn and Cd is much reduced, whereas that for Cu, Co, Pb and Be is manifest. In the mineral soil horizons the trace elements are more mobile than the macro‐elements, while in the organic layers they are less mobile than the macro‐nutrients K, P, Ca, and Mg. Be, Co, Cu, and Zn occur primarily in oxidic bonded forms; Pb is mainly organically bound. Co is most highly involved in redox processes. The mobility in the mineral soil increases in the following order: Zn > Cd = V > Pb > Cu > Co > Be; in the organic layers it is as follows: Zn > V > Cd > Cu > Co > Be > Pb. Therefore Zn, Cd, and V are primarily mobile elements; in contrast Co, Be, and Pb are predominantly less mobile.