Phytolith transport in sandy sediment: Experiments and modeling

Fishkis, Olga; Ingwersen, Joachim; Streck, Thilo

doi:10.1016/j.geoderma.2009.04.003

Cited by 62 publications

(38 citation statements)

References 63 publications

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“…The average phytolith transport rate determined in the present study for intact Cambisol (4 cm) was about one order of magnitude higher than that observed in laboratory experiments with packed sand (0.3 cm) (Fishkis et al, 2009). The irrigation rate and cumulative volume of irrigation in the laboratory were higher than the natural rainfall under field conditions.…”

Section: Comparison Between Field and Lab Studiescontrasting

confidence: 72%

Phytolith transport in soil: A field study using fluorescent labelling

et al. 2010

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Section: Comparison Between Field and Lab Studiescontrasting

confidence: 72%

Phytolith transport in soil: A field study using fluorescent labelling

et al. 2010

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“…The phytolith transport distance reported in the present study for intact Cambisol cores (2.2 ± 0.1 cm) was almost one order of magnitude larger compared with that in a repacked sand (0.3 ± 0.01 cm) (mean ± SE) (Fishkis et al , 2009). On the other hand, the rate of irrigation was one order of magnitude greater and the cumulative irrigation volume was by a factor of two greater in the experiment with homogeneous sand.…”

Section: Discussionmentioning

confidence: 40%

Phytolith transport in soil: a laboratory study on intact soil cores

Fishkis

Ingwersen

Lamers

et al. 2010

European J Soil Science

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Column experiments on phytolith transport were conducted to assess the partial contributions of water percolation and earthworm activity to phytolith transport in loamy and sandy soils. Six intact cores of a loamy sandy Haplic Cambisol and nine cores of a silty loamy Stagnic Luvisol were excavated. With the Luvisol, three treatments were perfomed: a percolation treatment with periodic irrigation, but without earthworms, a percolation and earthworm treatment with periodic irrigation and earthworms (Aporrectodea caliginosa) and a control. The Cambisol cores did not contain earthworms and hence only percolation and control treatments were tested. The phytoliths of common reed (Phragmites australis) were labelled with the fluorescent dye fluorescein isothiocyanate and applied to the soil surface of each core. Except for the control treatment, 3600 mm of water was applied over 6 months. In the Cambisol, the weighted mean transport distance of phytoliths was significantly greater with percolation (2.2 ± 0.1 cm) than in the control (0.9 ± 0.3 cm), indicating that water percolation is a driving mechanism of phytolith transport. In the Luvisol, the difference in mean transport depth between control and percolation treatments (1.0 ± 0.2 and 1.5 ± 0.3 cm) was not significant. The earthworms did not affect the mean transport distance of phytoliths in the Luvisol, but the phytolith concentrations in the leachates were significantly greater and their size distribution did not change with soil depth as observed in the percolation treatment without earthworms. Further studies are required to quantify the effect of earthworms on phytolith transport.

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“…Pearson's correlation coefficients suggested that the importance of soil properties for SP accumulation was in the following order: clay content > OC > EC > Al ox > Fe ox . Clay content, which reflects soil texture, might relate to the enrichment of SPs by reducing movement down the soil profile (Fishkis et al, ), and is supported by the positive correlation between SPs and clay content. This suggests that the more clay particles are present in the soil, the less SPs are lost by transport to the subsoil.…”

Section: Discussionmentioning

confidence: 96%

“…Occluded organic carbon (phytOC) is another factor involved in the preservation of phytoliths, providing a protective shield against hydrolysis (Nguyen et al, 2014;Parr & Sullivan, 2005). Physical translocation within the soil profile, from fast water percolation, is also a factor that regulates phytolith content in the topsoil (Fishkis, Ingwersen & Streck, 2009). However, the role of soil media, particularly soil texture, on phytolith transport is not fully known.…”

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confidence: 99%

Fern, Dicranopteris linearis, derived phytoliths in soil: Morphotypes, solubility and content in relation to soil properties

Nguyen

Meharg

Carey

et al. 2019

European J Soil Science

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Ferns are among the most popular groups of plants in the tropics and subtropics, and their role as carbon sequestrators has been widely recognized. However, there is little understanding of the silicaceous structures (phytoliths) of ferns, rate of phytolith turnover, the consequences for organic matter sequestered in phytoliths and consequences for other soil properties. In the study reported here, high‐resolution X‐ray tomographic microscopy and chemical characterization were applied to examine the traits of phytoliths of the fern Dicranopteris linearis (Burm.f.) Underw. (D. linearis), with a focus on their dissolution properties and accumulation in northern Vietnamese soils in relation to soil properties. Tomographic images revealed an inter‐embedding structure of silica and organic matter, especially in leaf‐derived material. We propose that organic matter and silica can preserve each other against decomposition. In batch experiments, there was a relatively small rate of dissolution of phytoliths with dry ashing and subsequent H2O2 treatment. Silicon (Si) dissolution for D. linearis phytolith samples was much less than that for rice phytoliths. Despite the fact that the aluminum (Al) content was large in D. linearis leaves, batch dissolution data did not confirm a relation between Al and the slow rate of phytolith dissolution. The soil phytolith content varied from 0.9 to 7.5 g kg−1 in the topsoil across the mountainous areas in northern Vietnam, whereas it tended to be smaller in the subsoil. The data indicate a relation between phytolith and soil organic matter, clay content, oxalate‐soluble Al and electrical conductivity, suggesting that these soil properties are among the important factors affecting the size of the soil phytolith Si pool. Highlights Si tends to accumulate in leaves rather than stems of the fern D. linearis. D. linearis phytoliths showed little dissolution, suggesting their strong stability. OC, EC, clay content and Alox appear as factors ‘feeding’ D. linearis phytoliths. In contrast, Feox and pH did not correlate with D. linearis phytolith content.

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Phytolith transport in sandy sediment: Experiments and modeling

Cited by 62 publications

References 63 publications

Phytolith transport in soil: A field study using fluorescent labelling

Phytolith transport in soil: A field study using fluorescent labelling

Phytolith transport in soil: a laboratory study on intact soil cores

Fern, Dicranopteris linearis, derived phytoliths in soil: Morphotypes, solubility and content in relation to soil properties

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