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Role of sulphate in affecting soil availability of exogenous selenate (SeO42-) under different statuses of soil microbial activity

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  • Lukáš Praus
  • Jiřina Száková

    (Department of Agroenvironmental Chemistry and Plant Nutrition, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Prague, Czech Republic)

Abstract

We investigated sulphate application, different statuses of soil microbial activity and their joint effects as variables associated with changes in potentially plant-available selenium (Seppa) and soil Se fractionation during the course of an incubation study. The time-resolved behaviour of added selenate (400 µg Se/kg as Na2SeO4) in two agricultural soils was elucidated by means of single extraction (50 mmol/L NH4H2PO4), sequential extraction procedure (SEP) and chemical speciation analysis in phosphate extracts. The decrease in phosphate-extractable Se, a consequence of soil aging, was inhibited by sulphate (by 34% and 29% in Chernozem and Cambisol, respectively) and by gamma-irradiation (by 46% and 20% in Chernozem and Cambisol, respectively) after 72 days of incubation as compared to the control treatments. Glucose amendment dramatically decreased Seppa only in the Chernozem. After 1 year, the initial soil treatment with respect to inhibited or stimulated microbially-mediated processes substantially controlled the distribution pattern of exogenous Se as observed using the SEP. Application of sulphur fertilisers and sources of labile organic matter is thus an essential agronomic practice to correct unfavourable amounts of Seppa.

Suggested Citation

  • Lukáš Praus & Jiřina Száková, 2019. "Role of sulphate in affecting soil availability of exogenous selenate (SeO42-) under different statuses of soil microbial activity," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 65(9), pages 470-476.
    • Handle: RePEc:caa:jnlpse:v:65:y:2019:i:9:id:397-2019-pse
    DOI: 10.17221/397/2019-PSE
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    References listed on IDEAS

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    1. L. Ducsay & O. Ložek & M. Marček & M. Varényiová & P. Hozlár & T. Lošák, 2016. "Possibility of selenium biofortification of winter wheat grain," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 62(8), pages 379-383.
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    Cited by:

    1. Tomáš Mrština & Lukáš Praus & Lukáš Kaplan & Jiřina Száková & Pavel Tlustoš, 2022. "Efficiency of selenium biofortification of spring wheat: the role of soil properties and organic matter amendment," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 68(12), pages 572-579.

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