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Die Podsolierungsstadien von Braunerden aus Schieferschutt
Author(s) -
Zezschwitz E. V.,
Schwertmann U.,
Ulrich B.
Publication year - 1973
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.19731360106
Subject(s) - podzol , chemistry , fractionation , oxalate , humus , silicate , mineralogy , analytical chemistry (journal) , inorganic chemistry , geology , environmental chemistry , soil water , chromatography , soil science , organic chemistry
Stages of Podsolization in Braunerden on Slate A six member pedosequence between Braunerde and Braunerde‐Podzol on slate in the Rheinisch‐Westfälisches Bergland was described and analyzed. Macromorphology of the profiles comprises the transformation from mull‐like mor to raw humus and the appearance of a podzol A and B horizon. The results of a detailed iron fractionation using differential dissolution methods (total, dithionite, oxalate, pyrophosphate, KC1 soluble) clearly reflects change in Fe during podsolization. Silicate Fe (total minus, dithionite) decreases compensating part of Fe loss in the A horizon which accumulates in the B. The Fed maximum is in the strongest podsolized member (Braunerde‐Podsol), whereas the maxima of the more mobile Fe fractions (Fe KCI , Fe py and partly Fe o ) as well as the oxalate soluble carbon occurs in the weaker podsolized members (podsolized Braunerde). Within the profiles the more mobile Fe fractions have their maximum in the horizon of strongest Fe mobilization (A) whereas the less mobile fractions show maxima in the horizon of immobilization (B). The Fe fractionation improves proper horizontation of the profiles and proves the sequence to be a continuum. The change on ecological conditions is better indicated by decreasing amount of P than by changes in C and N although C/N is increasing along the series. Since the Braunerde is already very acid a change in exchangeable cations is not significant except an increase in exchangeable Fe and a decrease in exchangeable Mn. In the equilibrium soil solution an increase in H, Al and Fe and a decrease in Ca was noted. With increasing podsolization the turn over of Ca between soil and plant appears to decrease. The local distribution of the soils with varying degree of podsolization in this mountainous forest region appears to depend on such factors as inclination, exposition and forest history.