at Google ScholarTitle data
Duncan, Aria H. ; Armenta, Natalia ; Garcia-Ledezma, Frida ; Heck, Celine A. ; Hafner, Sylvia ; Planer-Friedrich, Britta ; Fendorf, Scott:
Alternate Wetting and Drying Limits Arsenic in Porewater and Rice Grain under Severe Future Climate Conditions.
In: Environmental Science & Technology.
(16 October 2025)
.
ISSN 0013-936X
DOI: https://doi.org/10.1021/acs.est.5c03552
Abstract in another language
Climate change, coupled with widespread soil arsenic (As) contamination, is expected to decrease rice yields and increase grain As, threatening food security. One promising mitigation strategy is alternate wetting and drying (AWD) irrigation. However, AWD has not previously been tested under potential future climate conditions. Using rhizoboxes to visualize the rhizosphere, we evaluated the efficacy of AWD for limiting porewater and grain As under both current (daily high of 33 °C and 420 ppmv CO2) and severe warming conditions (daily high of 38 °C and 850 ppmv CO2). Compared to continuous flooding, AWD decreased cumulative As exposure 10 cm below the surface by 8.2× under a 33 °C climate and by 15.9× under a 38 °C climate. Grain total As concentrations decreased by 1.5× with AWD under a 33 °C climate and by 1.3× under a 38 °C climate. Porewater cadmium (Cd) concentrations often increased following drainage but never exceeded 1 μg L–1, and grain Cd concentrations were 14.7× to 119.7× lower than grain As concentrations. Both AWD and the 38 °C and 850 ppmv CO2 climate conditions enhanced root growth. Our findings indicate that AWD may still be an effective As mitigation strategy under severe future climate conditions.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | Intermittent Irrigation; Arsenic; Rice; Climate Change; Cadmium; Irrigation Management |
| Institutions of the University: | Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professor Environmental Geochemistry Group Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professor Environmental Geochemistry - Univ.-Prof. Dr. Britta Planer-Friedrich Profile Fields > Advanced Fields > Ecology and the Environmental Sciences Research Institutions Research Institutions > Central research institutes > Bayreuth Center of Ecology and Environmental Research- BayCEER Research Institutions > Research Units |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 550 Earth sciences, geology |
| Date Deposited: | 22 Oct 2025 05:45 |
| Last Modified: | 22 Oct 2025 06:13 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/94956 |