Study on the Accumulation Properties of Sweet Sorghum Seedling to Cd and Pb

doi:10.11924/j.issn.1000-6850.2012-2297

Abstract

Abstract: To confirm the response and absorption character of sweet sorghum in seedling stage to soil heavy metal pollution, the seedlings of two sweet sorghum varieties (‘Liaotian No.1’& XT-2) were studied by pot experiment with heavy metal-polluted soil to confirm the distribution regularity of Pb and Cd in sweet sorghum seedling. And the accumulation coefficient and transfer coefficient were calculated. The results showed that: the heavy metal contents in two varieties’of sweet sorghum seedlings increased with increase of heavy metal fraction in soil. There were significant differences between the heavy metal contents in root, stem and leaf. The Cd was accumulated in the order that root > stem > leaf and Pb accumulation order was root > leaf > stem. The accumulation coefficients of roots of two varieties were higher than those of stem and leaf, and there were no clear differences in accumulation coefficients of stem and leaf. The transfer coefficients of‘Liaotian No.1’stem to Cd was higher than that of XT-2. The Cd transfer coefficients of stem of two varieties were higher than that of leaves. The two coefficients of two varieties were less than 1.

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