Conference Proceedings

Effect of irrigation management and incorporation of plant residues on arsenic species and straighthead in rice

J Panozzo, C Quintero, R Befani, M Zamero, E Díaz, G Boschetti, SS Farías, JA Londonio, Y Morisio, P Smichowski, RE Servant

One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment | Published : 2014

Abstract

The biogeochemical reactions that occur under different rice growing conditions affect arsenic speciation, availability and uptake. Using two irrigation systems, continuous and interrupted, both in combination with the incorporation of vegetable residues, As concentration (speciation) in grain and straw, grain yield and unfilled kernels were measured. The occurrence of straighthead, a physiological disorder associated to the presence of As, which cause empty and deformed grains, was also determined. Continuous irrigation in the presence of vegetable residues resulted in high availability of DMA, favoring straighthead and resulting in yield losses. Simple interruption of irrigation during the..

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