Lundi 23 mars 2026 de 11h à 12h, Matthiew Reid | Cornell University, Ithaca, NY USA, présentera en salle Jean-Paul Taris un séminaire/webinaire intitulé :
Arsenic in Rice: What Role Can Water and Soil Management Practices Play in Controlling Arsenic Concentrations in Rice Grains?
Ce séminaire aura lieu en anglais
Résumé de l’intervention
Pour participer à ce webinaire à distance :
https://us06web.zoom.us/j/83377815145
Summary of the speech
Arsenic accumulation in rice grain is a global food safety concern because continuously flooded paddy soils promote reducing conditions that mobilize arsenic through the reductive dissolution of iron minerals. This presentation will summarize research on water and soil management practices that can influence these biogeochemical processes and thereby reduce arsenic uptake by rice. Field and laboratory studies demonstrate that appropriately timed soil drying events can reduce dissolved arsenic concentrations and lower grain arsenic while maintaining crop yields. Additional management strategies, including crop residue amendments, can further influence soil redox dynamics and trace element availability. While these practices can decrease total arsenic concentrations, the control on highly toxic inorganic arsenic species in rice remains a challenge. Together, these findings highlight that practical water and soil management strategies provide effective tools for farmers to mitigate arsenic accumulation in rice grain while supporting sustainable rice production systems.