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Journal of soil science and plant nutrition

versão On-line ISSN 0718-9516


GUTIERREZ-GINES, M. J; HERNANDEZ, A. J  e  PASTOR, J. Impacts of soil-soluble anions on wild and cultivated herbaceous species: implications for soil phytoremediation. J. Soil Sci. Plant Nutr. [online]. 2016, vol.16, n.2, pp.423-437.  Epub 04-Maio-2016. ISSN 0718-9516.

This study addresses the growing problem of soil salinity. In Mediterranean regions, disused solid waste landfills have given rise to disturbed ecosystems. At such sites, both mobile soil anions and cations have toxic effects on plants. Thus, detailed knowledge of these effects is needed for the phytoremediation of soils facing the problem of salinization. In this study, high chloride levels were detected in soil samples from several sealed waste landfill sites showing metal pollution. We also examined the nutrition behaviour of six native and five cultivated herbaceous species (two forage species and three for human consumption) grown in soils containing zinc chloride. Based on the tolerance shown by Lolium rigidum to this salt in a first bioassay, we assessed its behaviour in the presence of other chlorides and other Zn salts (sulphates and nitrites). Besides providing plant anion concentrations (which are particulary novel results), our study identified Lolium rigidum as a species able to well-tolerate soil salinity and accumulate high levels of zinc chloride indicating its possible use for the phytostabilization of soils polluted with this salt.

Palavras-chave : Soil and plant anions; mineral nutrition; phytotoxicity; phytoremediation.

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