METAL UPTAKE BY BARLEY FROM FIELD PLOTS FERTILIZED WITH SLUDGE

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Abstract
A field study was established to determine the uptake of metals by barley plants grown for three years on soil treated annually with sewage sludge (45 to 225 metric tons per hectare) or NPKS fertilizer. The grain was analyzed for Fe, Mn, Zn, and Cu, of the essential elements, and Pb, Cd, Ni, Co, and Cr. The yields were increased more than fivefold, compared to unfertilized control plots, by the addition of sludge. No adverse effects on yield or symptoms of toxicity were observed at the end of the third year. The metal content in the grain was below the limits generally accepted as toxic for plants. A field study was established to determine the uptake of metals by barley plants grown for three years on soil treated annually with sewage sludge (45 to 225 metric tons per hectare) or NPKS fertilizer. The grain was analyzed for Fe, Mn, Zn, and Cu, of the essential elements, and Pb, Cd, Ni, Co, and Cr. The yields were increased more than fivefold, compared to unfertilized control plots, by the addition of sludge. No adverse effects on yield or symptoms of toxicity were observed at the end of the third year. The metal content in the grain was below the limits generally accepted as toxic for plants. © Williams & Wilkins 1978. All Rights Reserved.

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