Efficacy of Si fertilization to modulate the heavy metals absorption by barley (Hordeum vulgare L.) and pea (Pisum sativum L.) |
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Authors: | Xiao Wei Yuqiao Liu Qiang Zhan Matichenkov Vladimir Bocharnikova Elena Dåstøl Magne |
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Institution: | 1.Hunan Institute of Economic Geography, Changsha, 410004, China ;2.Institute Basic Biological Problems, RAS, Pushchino, 142290, Russia ;3.Institute of Physical-Chemical and Biological Problems in Soil Science, RAS, Pushchino, 149290, Russia ;4.Elkem Silicon Materials, NO-4675, Kristiansand, Norway ; |
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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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