Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil
The 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 assa...
| Main Authors: | , , , , |
|---|---|
| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Wiley
2016
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/165378 |
| _version_ | 1855533038962737152 |
|---|---|
| author | Izquierdo, M. Impa, S.M. Johnson-Beebout, S.E. Weiss, D.J. Kirk, G.J.D. |
| author_browse | Impa, S.M. Izquierdo, M. Johnson-Beebout, S.E. Kirk, G.J.D. Weiss, D.J. |
| author_facet | Izquierdo, M. Impa, S.M. Johnson-Beebout, S.E. Weiss, D.J. Kirk, G.J.D. |
| author_sort | Izquierdo, M. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The 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. |
| format | Journal Article |
| id | CGSpace165378 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | CGSpace1653782025-05-14T10:39:51Z Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil Izquierdo, M. Impa, S.M. Johnson-Beebout, S.E. Weiss, D.J. Kirk, G.J.D. isotopes production rice soils soil chemicophysical properties soil fertility submergence submergence tolerance zinc The 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. 2016-01 2024-12-19T12:55:02Z 2024-12-19T12:55:02Z Journal Article https://hdl.handle.net/10568/165378 en Wiley Izquierdo, M.; Impa, S. M.; Johnson‐Beebout, S. E.; Weiss, D. J. and Kirk, G. J. D. 2016. Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil. European J Soil Science, Volume 67 no. 1 p. 51-59 |
| spellingShingle | isotopes production rice soils soil chemicophysical properties soil fertility submergence submergence tolerance zinc Izquierdo, M. Impa, S.M. Johnson-Beebout, S.E. Weiss, D.J. Kirk, G.J.D. Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title | Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title_full | Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title_fullStr | Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title_full_unstemmed | Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title_short | Measurement of isotopically‐exchangeable Zn in Zn‐deficient paddy soil |
| title_sort | measurement of isotopically exchangeable zn in zn deficient paddy soil |
| topic | isotopes production rice soils soil chemicophysical properties soil fertility submergence submergence tolerance zinc |
| url | https://hdl.handle.net/10568/165378 |
| work_keys_str_mv | AT izquierdom measurementofisotopicallyexchangeablezninzndeficientpaddysoil AT impasm measurementofisotopicallyexchangeablezninzndeficientpaddysoil AT johnsonbeeboutse measurementofisotopicallyexchangeablezninzndeficientpaddysoil AT weissdj measurementofisotopicallyexchangeablezninzndeficientpaddysoil AT kirkgjd measurementofisotopicallyexchangeablezninzndeficientpaddysoil |