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Written Paper

Cadmium and lead uptake by radish (Raphanus sativus L.) grown in three different textured soils  [2007]

Kibria, M.G. (Chittagong Univ. (Bangladesh). Dept. of Soil Science) Osman, K.T. (Chittagong Univ. (Bangladesh). Dept. of Soil Science) Ahmed, M.J. (Chittagong Univ. (Bangladesh). Dept. of Chemistry)

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Radish (Raphanus sativus L.) was grown in earthen pots containing soils of three different textures (clay loam, sandy clay loam and sandy loam) and treated separately with different levels of cadmium (0, 1, 3, 5, 7 and 9 mg Cd per kg soil) and lead (0, 10, 20, 30, 40 and 50 mg Pb per kg soil). Shoot and root dry weights were reduced to 25-38% and 36-46%, respectively at the highest Cd treatment, and 28-33 and 35-53%, respectively at the highest Pb treatment as compared to the control treatment. Cadmium and Pb application with higher rates significantly decreased the shoot and root yield of radish. Cadmium and Pb concentration in shoot and root increased with rate of Cd and Pb application, respectively. The concentration of Cd started to increase significantly at 3 mg Cd per kg soil treatment as compared to the control except for shoot in sandy loam soil. Lead treatment at 10 mg Pb per kg soil caused significantly higher Pb concentration in shoot and root from the control in all the three soils. Among the soils, Cd and Pb concentration in shoot and root were pronounced in sandy loam soil. Total accumulation of Cd showed almost the similar trend as that of Cd concentration in shoot and root. Lead accumulation in root did not show any definite trend of variation with Pb application in sandy loam and sandy clay loam soil. Bioaccumulation coefficients of Cd and Pb were higher in shoot than root. Cadmium and Pb concentration in plant parts were highly correlated
with Cd and Pb application in soils respectively.

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Soil and Environment (Pakistan)

ISSN : 1019-729X

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