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UPTAKE OF CADMIUM FROM PHOSPHATE FERTILIZERS BY PEAS, RADISHES, AND LETTUCE
Citation:
Ruess, J., H. Dooley, AND W. Griffis. UPTAKE OF CADMIUM FROM PHOSPHATE FERTILIZERS BY PEAS, RADISHES, AND LETTUCE. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-78/061 (NTIS PB289184), 1978.
Description:
Cadium uptake from phosphate fertilizers by radish (Raphanus sativa) lettuce (Latuca sativa) and garden peas (Pisum satium) was investigated in the greenhouse. Fertilizer in all treatments was applied at the rate of 100 P/g soil to pots containing 4kg soil. When reagent grade mono-calcium phosphate was used as a P source on a coarse-textured acid soil, Cd contents of edible radish roots and tops were 0.4 g/g dry weight; while the Cd content of lettuce, and pea seeds and pea foliage was 0.2 g/g. The use of concentrated superphosphate (CSP) containing 174 g Cd/g resulted in plant Cd levels of 2.4, 3.4, 6.3, 0.9, and 0.5 g/g for radish roots, radish tops, lettuce, pea seeds and pea foliage, respectively. CSP when mixed with the soil, but placement of DAP almost completely eliminated Cd uptake from the fertilizer.