Development of a method for sequential Si extraction from soils

Georgiadis, Anna; Sauer, Daniela; Herrmann, Ludger; Breuer, Jörn; Zarei, Mehdi; Stahr, Karl

doi:10.1016/j.geoderma.2013.06.023

Cited by 68 publications

(67 citation statements)

References 51 publications

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“…Part of the released Si reacts with Al, and to a lesser extent with Fe and Mg, to form secondary clay minerals, while another part precipitates as pedogenic silica and the remainder is subjected to leaching (Haynes, 2014). Absorption of silicic acid can occur on the surfaces of various soil components depending mostly on soil reaction, soil composition and the specific surface of sorbents (Georgiadis et al, 2013). An important role in the absorption along with the release of silicic acid in soils is ascribed to the pedogenic oxides and hydroxides that are abundant in soils (Cornelis et al, 2010).…”

Section: Silicon Formsmentioning

confidence: 99%

“…Amorphous silica in many soils is mostly represented by biogenic silica (bSi), also referred to as bio-opal, or amorphous opaline silica, which is sub-divided into phytogenic Si, mainly represented by phytoliths, and microbial and protozoic Si, mainly found in form of siliceous sponges, diatoms and radiolarians Georgiadis et al, 2013). The phytogenic Si is regarded as the major component of the biogenic silica pool in soils (Clarke, 2003;Sommer et al, 2006).…”

Section: Silicon Formsmentioning

confidence: 99%

“…The phytogenic Si is regarded as the major component of the biogenic silica pool in soils (Clarke, 2003;Sommer et al, 2006). The Si released in the soil solution from biogenic Si is twice to three times as high as that from weathering of silicate minerals and is, therefore, considered a major source of dissolved Si in the soil solution (Alexandre et al, 1997;Cornelis et al, 2010;Georgiadis et al, 2013). In natural ecosystems, the biogenic Si is cycled from soil to plant and then back to the soil, and losses through leaching or precipitation are relatively small compared to the quantities continually being cycled.…”

Section: Silicon Formsmentioning

confidence: 99%

See 2 more Smart Citations

Biostimulant activity of silicon in horticulture

Savvas

Ntatsi

2015

Scientia Horticulturae

228

139

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Section: Silicon Formsmentioning

confidence: 99%

Section: Silicon Formsmentioning

confidence: 99%

Section: Silicon Formsmentioning

confidence: 99%

See 1 more Smart Citation

Biostimulant activity of silicon in horticulture

Savvas

Ntatsi

2015

Scientia Horticulturae

228

139

View full text Add to dashboard Cite

“…A full comprehension of the effects of land use change on Si release therefore not only requires further research on the solubility of different Si fractions present in soils under natural conditions (Barão et al, 2014, Georgiadis et al, 2013, Sauer et al, 2006 but also the development and operationalization of coupled geochemical-hydrological models that would allow to assess the combined effect of geochemical (amounts of BSi, pH, …) and hydrological (water fluxes) changes (Maher, 2010).…”

Section: Resultsmentioning

confidence: 99%

“…CaCl 2 extractions on the forest soils (Table 2) and on Cambisol, Podzol and Luvisol (Georgiadis et al, 2013) revealed higher Si concentrations from the B horizon compared to the A horizon. However Si release curves for the B horizons did not show high concentrations or a rapid initial decline like the A-horizon suggesting the absence of a highly reactive fraction.…”

Section: Time Dependency Of Dsi Concentrationsmentioning

confidence: 93%

Factors controlling Si export from soils: A soil column approach

Ronchi

Barão

Clymans

et al. 2015

CATENA

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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 b 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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Variation of soil silicon fractions and bioavailability during centennial‐scale evolution of ecosystem after glacier retreat

Song

Yang

et al. 2022

Soil Science Soc of Amer J

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The biogeochemical cycle of Si plays an important role in maintaining the function and stability of ecosystems. Although there have been many studies on long-term silicate weathering, there are few reports on Si fractions and cycling in early ecosystem development. Using optimized sequential chemical extraction processes, this study quantified soil Si fractions of the eluvial horizon and deposition layers in Hailuogou Glacier Retreat Area of Gongga Mountain, Southwest China. The results showed that plant-available Si (NaAc-Si) content decreased significantly from 33.40 to 2.16 mg kg −1 with the increase of soil age. There was a significantly positive correlation (p < .01) between soil pH and NaAc-Si. Within the labile Si fractions, the largest fraction was amorphous Si (Na 2 CO 3 -Si) (165.35 ± 81.50 mg kg −1 ), followed by pedogenic oxides/hydroxides chemisorbed Si (Oxalate-Si) (135.13 ± 66.83 mg kg −1 ), Si adsorbed on the surface of inorganic soil particles (Acetic-Si) (9.66 ± 4.27 mg kg −1 ), and soluble Si (CaCl 2 -Si) (4.89 ± 1.68 mg kg −1 ). Compared with Stage 1 (i.e., a variety of pioneer species symbiosis stage) after glacier retreat, the storage of these four labile Si fractions in Stage 3 (i.e., climax species stage) decreased by 45.95% (CaCl 2 -Si), 42.98% (Acetic-Si), 67.34% (Oxalate-Si), and 75.24% (Na 2 CO 3 -Si), respectively, due to the absorption and utilization of Si by plants. Our study implies that the multiple transformations of different Si fractions in soils and the absorption and return of Si by plants can keep the CaCl 2 -Si pool in dynamic equilibrium, which provides a basis for the stability of ecosystem functions during the vegetation evolution after glacier retreat.

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Development of a method for sequential Si extraction from soils

Cited by 68 publications

References 51 publications

Biostimulant activity of silicon in horticulture

Biostimulant activity of silicon in horticulture

Factors controlling Si export from soils: A soil column approach

Variation of soil silicon fractions and bioavailability during centennial‐scale evolution of ecosystem after glacier retreat

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