Abstract
Silicon-based fertilizers and soil amendments can have direct and indirect positive influences on cultivated plants. The solid forms of Si-based substances, the most widespread in use, are efficient only at high application rates due to their low level of solubility. Several types of Si-based substances such as fumed silica, slags from the iron and steel industry, modified slags, and a Si-rich product were tested using barley and pea as silicon accumulative and non-accumulative plants, respectively, at two application rates. The plants were grown under toxic concentrations of heavy metals in a greenhouse. Si-rich materials high in water-soluble Si had a positive effect at both the low and high application rates, and for both plant species. This type of substance can be regarded as Si fertilizer, demonstrating greater efficiency at a low application rate and lessened efficiency at a high application rate for protection of the cultivated plants against accumulation of the heavy metals.
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The study was supported by the International S&T Cooperation Program of China (ISTCP) special project (2015DFR91000) and by the Elkem Silicon Materials.
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Xiao, W., Yuqiao, L., Qiang, Z. et al. Efficacy of Si fertilization to modulate the heavy metals absorption by barley (Hordeum vulgare L.) and pea (Pisum sativum L.). Environ Sci Pollut Res 23, 20402–20407 (2016). https://doi.org/10.1007/s11356-016-7182-3
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DOI: https://doi.org/10.1007/s11356-016-7182-3