The forms of silicon in soils are considered. Distilled water, solutions of acids (0.1 N HCl, 0.01 N H2SO4) and salts (0.01 M CaCl2) were used as silicon extractants from gray forest soil. The possibility of determining silicon using ICP-AE has been demonstrated. It has been suggested that successful extractants for the available forms are H2O (for the determination of mono- and polysilicic acids), 0.1 N HCl (for amorphous forms).
silicon, soil, plant, method, spectrometry, extraction.
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