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- W3173134025 startingPage "e00406" @default.
- W3173134025 abstract "Silicon (Si), which mainly exists in soils as orthosilicic acid (H 4 SiO 4 ), is beneficial for rice growth. In total, 17 Inceptisols soil profiles, 4 from uncultivated lands and 13 from paddy fields derived from felsic to ultramafic parent materials were collected for the extraction of available Si from horizon soil samples by using an acetate buffer solution. The aim of this work was to illustrate the relationship between extractable Si and general soil properties for predicting the availability of Si for rice growth. The means of available Si in the studied Inceptisols on the uncultivated lands and paddy fields were 244 mg kg −1 and 114 mg kg −1 , respectively. The amount of available Si increased from the surface to subsurface soils in the soils on the uncultivated lands, whereas the available Si was irregular along with depth in the paddy soils. The amount of available Si was linearly and significantly ( p < 0.001) correlated with clay and dithionite-citrate-bicarbonate extractable iron oxides (Fe d ) in all soils. The amount of available Si increased with an increase in pH in the soils from the uncultivated lands. However, a poor correlation was observed between pH and available Si in the paddy soils because labile Si was affected by human activities, such as liming and flooding, especially for surface soils. Nevertheless, the available Si was successfully estimated using crystalline iron oxides in the soils on the uncultivated lands; however, in the paddy soils, clay and organic carbon were used in the multi-regression model to estimate the amount of available Si. • The available Si in the uncultivated soils was higher than that in the paddy soils. • Clay and Fe oxides were important properties affecting Si availability in all soils. • The available Si can be predicted by Fe oxides for the uncultivated soils. • Processes of rice cultivation made Si availability independent of soil pH." @default.
- W3173134025 created "2021-06-22" @default.
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- W3173134025 date "2021-09-01" @default.
- W3173134025 modified "2023-09-29" @default.
- W3173134025 title "Silicon availability in relation to soil properties in Inceptisols on uncultivated lands and paddy fields in Taiwan" @default.
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- W3173134025 doi "https://doi.org/10.1016/j.geodrs.2021.e00406" @default.
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