Journal
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
Volume 47, Issue 2, Pages 221-236Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00103624.2015.1122799
Keywords
Agronomical characteristics; contamination factor; heavy metals; sewage sludge; Spinacia oleracea
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Funding
- University Grants Commission, New Delhi, India [F.7-70/2007-2009 BSR]
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The assessment of heavy metals in spinach (Spinacia oleracea) grown in sewage sludge-amended soil was investigated. The results revealed that sewage sludge significantly (P<0.01) increased the nutrients and heavy metals such as cadmium (Cd), chromium (Cr), copper (Cu), manganese (Mn), and zinc (Zn) in the soil. The contents of metals were found to be below the maximum levels permitted for soils in India. The most agronomic performance and biochemical components of S. oleracea were found at 50% concentrations of sewage sludge in both seasons. The contents of Cd, Cr, Cu, Mn, and Zn in S. oleracea were increased from 5% to 100% concentrations of sewage sludge in both seasons. The order of contamination factor (Cf) of different heavy metals was Mn > Cd > Cr > Zn > Cu for soil and Cr > Cd > Mn > Zn > Cu for S. oleracea plants after application of sewage sludge. Therefore, use of sewage sludge increased concentrations of heavy metals in soil and S. oleracea.
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