title: Efficacy of Si fertilization to modulate the heavy metals absorption by barley (Hordeum vulgare L.) and pea (Pisum sativum L.).
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.
authors.affiliation: Hunan Institute of Economic Geography, Changsha, 410004, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Xiao
authors.affiliation: Hunan Institute of Economic Geography, Changsha, 410004, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Yuqiao
authors.affiliation: Hunan Institute of Economic Geography, Changsha, 410004, China.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Qiang
authors.affiliation: Institute Basic Biological Problems, RAS, Pushchino, 142290, Russia. vvmatichenkov@rambler.ru.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Matichenkov
authors.affiliation: Institute of Physical-Chemical and Biological Problems in Soil Science, RAS, Pushchino, 149290, Russia.
authors.forename: Elena
authors.initials: E
authors.lastname: Bocharnikova
authors.affiliation: Elkem Silicon Materials, NO-4675, Kristiansand, Norway.
authors.forename: Magne
authors.initials: M
authors.lastname: Dåstøl
mesh_terms: D001673:Biodegradation, Environmental; D005308:Fertilizers / Q000032:analysis*; D001467:Hordeum / Q000187:drug effects / Q000378:metabolism; D019216:Metals, Heavy / Q000032:analysis / Q000493:pharmacokinetics; D018532:Pisum sativum / Q000187:drug effects / Q000378:metabolism; D012825:Silicon / Q000032:analysis / Q000494:pharmacology; D012989:Soil Pollutants / Q000032:analysis / Q000493:pharmacokinetics
chemical_list: D005308:Fertilizers; D019216:Metals, Heavy; D012989:Soil Pollutants; D012825:Silicon
keywords: Barley; Heavy metals; Monosilicic acid; Pea; Silicon fertilizer