Identification and distribution of the readily soluble silicon pool in a temperate forest soil below three distinct tree species

Cornélis, Jean-Thomas; Titeux, Hugues; Ranger, Jacques; Delvaux, Bruno

doi:10.1007/s11104-010-0702-x

Cited by 107 publications

(74 citation statements)

References 56 publications

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“…The soil CSi a profile under continuous forest cover results from the interaction between both processes. Similar PSi a distributions were observed in temperate forest soils (Cornelis et al, 2011a). The large PSi a pool in the top layer is the result of biogenic accumulation processes (Alexandre et al, 1997;Blecker et al, 2006;Saccone et al, 2007;Cornelis et al, 2010).…”

Section: Asi Distributionsupporting

confidence: 75%

“…In order to improve the estimate, attention needs to be given in further studies to the effects of land use and land use history on ASi storage and mobilisation. Until now research has mainly focussed on natural ecosystems (Alexandre et al, 1997;Blecker et al, 2006;Saccone et al, 2007;Cornelis et al, 2011a) rather than systems affected by human impact (Kelly, 1998;Conley et al, 2008). Our study suggests that a correct assessment of human impact will be necessary to understand the Si cycle completely.…”

Section: Historical Deforestation: An Estimate For Temperate Regions mentioning

confidence: 91%

“…The large PSi a pool in the top layer is the result of biogenic accumulation processes (Alexandre et al, 1997;Blecker et al, 2006;Saccone et al, 2007;Cornelis et al, 2010). At depth, the increase in CSi a results from root phytolith input at root depth (Watteau and Villemin, 2001) and pedogenic processes such as the translocation-accumulation of phytoliths and Si adsorption onto Fe oxides and the formation of pedogenic opal (Cornelis et al, 2011a). Although total PSi a pools were not different for the three human-affected land use types, there are significant differences in the vertical distribution of PSi a .…”

Section: Asi Distributionmentioning

confidence: 99%

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Anthropogenic impact on amorphous silica pools in temperate soils

et al. 2011

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Abstract. Human land use changes perturb biogeochemical silica (Si) cycling in terrestrial ecosystems. This directly affects Si mobilisation and Si storage and influences Si export from the continents, although the magnitude of the impact is unknown. A major reason for our lack of understanding is that very little information exists on how land use affects amorphous silica (ASi) storage in soils. We have quantified and compared total alkali-extracted (PSi a ) and easily soluble (PSi e ) Si pools at four sites along a gradient of anthropogenic disturbance in southern Sweden. Land use clearly affects ASi pools and their distribution. Total PSi a and PSi e for a continuous forested site at Siggaboda Nature Reserve (66 900 ± 22 800 kg SiO 2 ha −1 and 952 ± 16 kg SiO 2 ha −1 ) are significantly higher than disturbed land use types from the Råshult Culture Reserve including arable land (28 800 ± 7200 kg SiO 2 ha −1 and 239 ± 91 kg SiO 2 ha −1 ), pasture sites (27 300 ± 5980 kg SiO 2 ha −1 and 370 ± 129 kg SiO 2 ha −1 ) and grazed forest (23 600 ± 6370 kg SiO 2 ha −1 and 346 ± 123 kg SiO 2 ha −1 ). Vertical PSi a and PSi e profiles show significant (p < 0.05) variation among the sites. These differences in size and distribution are interpreted as the long-term effect of reduced ASi replenishment, as well as changes in ecosystem specific pedogenic processes and increased mobilisation of the PSi a in disturbed soils. We have also made a first, though rough, estimate of the magnitude of change in temperate continental ASi pools due to human disturbance. Assuming that our data are representative, we estimate that total ASi storage in soils has declined by ca. 10 % since the onset of agricultural development (3000 BCE). Recent agricultural expansion (after 1700 CE) may have resulted in an average additional export of 1.1 ± 0.8 Tmol Si yr −1 from the soil reservoir to aquatic ecosystems. This is ca. 20 % to the global land-ocean SiCorrespondence to: W. Clymans (wim.clymans@ees.kuleuven.be) flux carried by rivers. It is necessary to update this estimate in future studies, incorporating differences in pedology, geology and climatology over temperate regions, but data are currently not sufficient. Yet, our results emphasize the importance of human activities for Si cycling in soils and for the land-ocean Si flux.

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Section: Asi Distributionsupporting

confidence: 75%

Section: Historical Deforestation: An Estimate For Temperate Regions mentioning

confidence: 91%

Section: Asi Distributionmentioning

confidence: 99%

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Anthropogenic impact on amorphous silica pools in temperate soils

et al. 2011

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“…The liquid form generally consists of mono-and polysilicic acids, complexed with organic and inorganic compounds, etc. [18]. Wollastonite is a naturally occurring mined CaSiO 3 and can be a useful Si source when finely ground.…”

Section: Introductionmentioning

confidence: 99%

Double Acid-Base Extraction of Silicic Acid from Quartz Sand

Santi¹,

Mulyanto²,

Goenadi³

2017

JMMCE

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Silica is becoming more attractive as plant nutrient for non-graminae crops particularly in relation with drought-stress tolerant. Many efforts have been conducted to obtain an efficient technique to produce silica fertilizer worldwide, but the results are varying considerably due to various factors including raw material and extraction technique. This study was carried out to develop an efficient extraction technique for ortho-silicic acid (OSA-H 4 SiO 4 ) from a Bangka-Belitung quartz sand by employing acid-base dissolution method. A 325-mesh size quartz sand was boiled in HCl solution at various concentrations. The optimum concentration was then used in the following experiment at several different volumes of solution. The sand obtained from optimum concentration and volume of HCl solution was then reacted with different amounts of NaOH (s), and heated until a wet mixture was obtained. As a reference the best extraction conditions were applied to a natural zeolite sample. All OSA analyses were done in triplicates with spectrophotometric method. Supporting evidences were collected from x-ray diffraction and scanning-electron-microscopy analyses of the treated samples. The yield of quartz sand-originated OSA was 183 g•kg −1 and significantly increased linearly with increasing weight of NaOH (R 2 = 0.99**), whereas that from zeolite was only 104.2 g•kg −1 at 80 g NaOH. XRD and SEM data confirmed the evidences that the acid-base extraction disrupted the quartz mineral structure and as a consequence releasing more water soluble OSA.

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“…Unfortunately, various non-BSi fractions also release Si either completely or partly in a non-linear manner in alkaline media, bringing the interpretation of the non-linear part as biological in origin into question (Cornelis et al, 2011a;Gehlen and van Raaphorst, 1993;Koning et al, 2002). Cornelis et al (2011b) reviewed sources that may completely dissolve and find that in addition to biogenic remains (e.g.…”

Section: Introductionmentioning

confidence: 99%

The contribution of tephra constituents during biogenic silica determination: implications for soil and palaeoecological studies

et al. 2015

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Abstract. Biogenic silica (BSi) is used as a proxy by soil scientists to identify biological effects on the Si cycle and by palaeoecologists to study environmental changes. Alkaline extractions are typically used to measure BSi in both terrestrial and aquatic environments. The dissolution properties of volcanic glass in tephra deposits and their nanocrystalline weathering products are hypothesized to overlap those of BSi; however, data to support this behaviour are lacking. The potential that Si-bearing fractions dissolve in alkaline media (Si Alk ) that do not necessarily correspond to BSi brings the applicability of BSi as a proxy into question. Here, analysis of 15 samples reported as tephra-containing allows us to reject the hypothesis that tephra constituents produce an identical dissolution signal to that of BSi during alkaline extraction. We found that dissolution of volcanic glass shards is incomplete during alkaline dissolution. Simultaneous measurement of Al and Si used here during alkaline dissolution provides an important parameter to enable us to separate glass shard dissolution from dissolution of BSi and other Si-bearing fractions. The contribution from volcanic glass shards (between 0.2 and 4 wt % SiO 2 ), the main constituent of distal tephra, during alkaline dissolution can be substantial depending on the total Si Alk . Hence, soils and lake sediments with low BSi concentrations are highly sensitive to the additional dissolution from tephra constituents and its weathering products. We advise evaluation of the potential for volcanic or other non-biogenic contributions for all types of studies using BSi as an environmental proxy.

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Identification and distribution of the readily soluble silicon pool in a temperate forest soil below three distinct tree species

Cited by 107 publications

References 56 publications

Anthropogenic impact on amorphous silica pools in temperate soils

Anthropogenic impact on amorphous silica pools in temperate soils

Double Acid-Base Extraction of Silicic Acid from Quartz Sand

The contribution of tephra constituents during biogenic silica determination: implications for soil and palaeoecological studies

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