Title
Factors controlling Si export from soils : a soil column approach Factors controlling Si export from soils : a soil column approach
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Giessen ,
Subject
Physics
Biology
Source (journal)
Catena: an interdisciplinary journal of geomorphology, hydrology, pedology. - Giessen
Volume/pages
133(2015) , p. 85-96
ISSN
0341-8162
ISI
000359960600009
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The release of dissolved silicon (DSi) from A and B horizons was investigated with leaching tests on unsaturated columns. As forest A horizons have larger biogenic Si (BSi) pools than arable lands, we compared the Si release from a forest and a cropland from the same geographical region developed on a Luvisol in Belgium and a Cambisol in Sweden. The A horizons released a quickly dissolving Si fraction in contrast to the B horizons, which did contain no or only little amounts of BSi and released lower Si concentrations. Our experiments show that Si export from forest soils is high because of the presence of a large reservoir of soluble BSi as well as due to the acidity of the soil (pH < 4). Leaching at two different water fluxes revealed that export in forest soils was transport controlled while cropland soils were in equilibrium.
E-info
https://repository.uantwerpen.be/docman/iruaauth/e1994d/b64ea541c7b.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/c6421b/10035.pdf
E-info
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