Factors controlling Si export from soils: A soil column approach

Benedicta Ronchi; Lúcia Barão; Wim Clymans; Floor Vandevenne; Okke Batelaan; Gerard Govers; Eric Struyf; Alain Dassargues

doi:10.1016/j.catena.2015.05.007

Factors controlling Si export from soils: A soil column approach

Benedicta Ronchi, Lúcia Barão, Wim Clymans, Floor Vandevenne, Okke Batelaan, Gerard Govers, Eric Struyf, Alain Dassargues

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

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.

Original language	English
Pages (from-to)	85-96
Number of pages	12
Journal	Catena
Volume	133
DOIs	https://doi.org/10.1016/j.catena.2015.05.007
Publication status	Published - 1 Oct 2015

Keywords

Biogenic Si
Flux
Land use
Pedogenic Si
Reactivity

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10.1016/j.catena.2015.05.007

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title = "Factors controlling Si export from soils: A soil column approach",

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.",

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T1 - Factors controlling Si export from soils: A soil column approach

AU - Ronchi, Benedicta

AU - Barão, Lúcia

AU - Clymans, Wim

AU - Vandevenne, Floor

AU - Batelaan, Okke

AU - Govers, Gerard

AU - Struyf, Eric

AU - Dassargues, Alain

PY - 2015/10/1

Y1 - 2015/10/1

N2 - 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.

AB - 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.

KW - Biogenic Si

KW - Flux

KW - Land use

KW - Pedogenic Si

KW - Reactivity

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DO - 10.1016/j.catena.2015.05.007

M3 - Article

VL - 133

SP - 85

EP - 96

JO - Catena

JF - Catena

SN - 0341-8162

ER -

Factors controlling Si export from soils: A soil column approach

Abstract

Keywords

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