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Relative Concentrations of Cadmium and Zinc in Tissue of Selected Food Plants Grown on Sludge-Treated Soils

Dep. of Agricultural Chemistry, WongKwang Univ., Chonbuk 515, Republic of Korea;

A. C. Chang^*, A. L. Page and J. E. Warneke

Dep. of Soil and Environmental Sciences, Univ. of California, Riverside, CA 92521.

^* Corresponding author.

ABSTRACT

Twelve selected food plants were grown in greenhouse pots to determine the relative concentration of Cd and Zn in the plants grown in sludge-treated soils. The relative concentration of the metal was calculated as the quotient of the metal content in a plant and that in Swiss chard [Beta vulgaris subsp. cicla (L.) Koch] grown under the same soil conditions. The relative concentrations of Cd and Zn of food plants grown in several sludge-treated soils were significantly different (p < 0.01), but the relative concentrations of these plants in one soil has the statistical characteristics (e.g., range, mean, median, coefficient of variation, etc.) as those in another soil.

At the time this experiment was conducted, the senior author was on sabbatical leave at the Univ. of California, Riverside.

Contribution from the Dep. of Soil and Environmental Sciences, Univ. of California, Riverside.

Received for publication November 17, 1987.