Abstract
Food crops (corn, oats, soybeans, vegetables) were grown on soils treated with fluidized bed combustion residue (FBCR) or hydrated lime. The composition of the foods and their nutritional quality were evaluated in growth, balance and carcass composition studies with growing hamsters and rats. Application of FBCR had little effect on elemental concentrations of dietary components. Weight gains in hamsters over a 6 week period were higher on FBCR than on lime-treated corn diets, but there were no differences due to FBCR in gains of hamsters on the oats diets or in rats on either of the cereal based diets. Apparent retention of nitrogen, calcium, phosphorus, sulphur and magnesium was determined by balance and by carcass analysis. Differences in mineral retention between FBCR and lime treatments were generally small and inconsistent. Analysis of the whole body of hamsters showed lower concentrations of nitrogen, phosphorus, zinc and copper with FBCR compared to lime-treated corn diets; little difference in body composition was found in the rat. There was no significant accumulation of heavy metals in liver, kidney, bone, serum or hair (of rats only) and no significant differences in concentrations of elements in organs due to application of FBCR to soils on which the dietary components had been grown.
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