Measurement of isotopically-exchangeable Zn in Zn-deficient paddy soil

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dc.contributor.authorIzquierdo, M.
dc.contributor.authorImpa, S. M.
dc.contributor.authorJohnson-Beebout, S. E.
dc.contributor.authorWeiss, D. J.
dc.contributor.authorKirk, Guy J. D.
dc.date.accessioned2016-06-08T10:00:50Z
dc.date.available2016-06-08T10:00:50Z
dc.date.issued2015-10-27
dc.description.abstractThe changes in soil chemistry following submergence of a soil for rice production result in zinc (Zn) being immobilized in very insoluble forms. Consequently, Zn deficiency is widespread in rice crops and in human populations that subsist on rice. We explored the use of stable isotopic dilution assays for assessing Zn dynamics in submerged paddy soil with two types of strongly Zn-deficient soil for rice cultivation in the Philippines. We optimized the isotope enrichment, electrolyte and equilibration time to measure isotopically-exchangeable Zn (E-values) without changing redox conditions. Available Zn was rapidly and strongly immobilized following submergence, which was controlled by CO2 accumulation. Addition of the isotopic tracer before submergence produced unreliable E-values because irreversible immobilization of the tracer progressed faster than isotopic exchange. Addition of the tracer to already reduced soil produced stable E-values for tracer–soil contact of up to 1 week. Longer periods produced unreliable E-values because of continuing irreversible fixation of the tracer. We discuss the implications for applications of isotopic dilution methods to measure trace-element dynamics in submerged soil.en_UK
dc.identifier.citationIzquierdo M, Impa SM, Johnson-Beebout SE, Weiss DJ, Kirk GJD. Measurement of isotopically-exchangeable Zn in Zn-deficient paddy soil. European Journal of Soil Science, Volume 67, Issue 1, pages 51–59, January 2016.en_UK
dc.identifier.issn1351-0754
dc.identifier.urihttp://dx.doi.org/10.1111/ejss.12303
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/9944
dc.language.isoenen_UK
dc.publisherWileyen_UK
dc.rightsAttribution-Non-Commercial 3.0 Unported (CC BY-NC 3.0) You are free to: Share — copy and redistribute the material in any medium or format, Adapt — remix, transform, and build upon the material. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: Non-Commercial — You may not use the material for commercial purposes. No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.rightsThis is the peer reviewed version of the following article: Izquierdo M, Impa SM, Johnson-Beebout SE, Weiss DJ, Kirk GJD. Measurement of isotopically-exchangeable Zn in Zn-deficient paddy soil. European Journal of Soil Science, Volume 67, Issue 1, pages 51–59, January 2016, which has been published in final form at: DOI:10.1111/ejss.12303. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. http://olabout.wiley.com/WileyCDA/Section/id-828039.html#submitted
dc.titleMeasurement of isotopically-exchangeable Zn in Zn-deficient paddy soilen_UK
dc.typeArticleen_UK

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