Growth, yield and Cd accumulation in rice under condition of contaminated irrigation water

Abstract

     Cadmium element (Cd) is toxic for humans, but its effects on the yield and quality of rice under contaminated irrigation conditions remains uncertain. In this study, paddy soils in the Red River Delta were selected for the experiment with the purpose of understanding the effects of Cd contaminated irrigation water on growth, yields, and accumulation of Cd in grain. Three levels of Cd contents including 0.01 - 0.05 - 0.5 mg/L in irrigation water was applied throughout the entirety of the crop season. The results showed that an accumulation of Cd in rice in the order roots > stems > seeds and Cd concentrations 0.05 mg/L and 0.5 mg/L in irrigation water affected significantly plant height and grain yeild. In addition, the accumulation of Cd in paddy soil under conditions of contaminated irrigation water (treatments of Cd 0.5 and Cd 0.05) increased 244.81 và 14.0 times compared Cd 0.01 treatment.