Correlation between extractable chromium, chromium uptake and productivity of beans (Phaseolus vulgaris) grown on tannery sludge-amended soil

摘要: The effects of different tannery sludge (0.27% Cr f.w.) doses (0, 8.7, 17.4, 34.8 g/kg soil) on growth and content Phaseolus vulgaris L. cv. Delinel grown potted soil in a chamber were analyzed. was vertic Ustochrept (pH 8.05, organic matter 2.26%, CEC 8.42 meq/100 g). Total concentrations after treatment 60, 88, 112 160 mg/kg. All treatments significantly decreased plant yield. Chromium toxicity symptoms developed plants with mg Cr/kg. correlated yield, but not leaf concentrations. VI detected either or sludge-treated soil. Among the extractants, viz. phosphate buffer, acetic acid, ammonium acetate, DTPA, acid-extractable showed best correlation both concentration However, critical (CTC) for 10% reduction from associated maximum Sequential extraction that incorporated mainly into moderately reduceable fraction, extractable acid oxalate. Acid oxalate-extractable oxalate may be useful extractant distinguishing naturally occurring waste Cr, which can cause phytotoxicity under certain conditions.