Heavy Metals Accumulation in Cauliflower (Brassica Oleracea L. var. Botrytis) Grown in Brewery Sludge Amended Sandy Loam Soil

Babu Ram Khanal, Shree Chandra Shah;Shrawan Kumar Sah;Chandeshwor Prasad Shriwastav;Bharat Sharma Acharya;

Abstract


An experiment was conducted to study the effects of five levels of brewery sludge (BS) (0, 5, 10, 15 and 20 Mg ha-1) and recommended dose of chemical fertilizers (100:60:50 NPK ha-1) on heavy metals content of soil and plant parts (leaf and Curd) of cauliflower. Brewery sludge application significantly increased the heavy metals (Zn, Cu, Pb, Cr and Cd) concentration in both soil and plant parts of cauliflower as compared to the unamended soil. The highest heavy metals concentrations in soil and plant parts (curd and leaf) were recorded from 20 Mg ha-1 BS application. Accumulation of heavy metals in leaf was higher than in curd. The curd yield of cauliflower significantly increased with brewery sludge application as compared to control. Heavy metals in soil were within the USEPA permissible limits. Leaf and curd in all treatments assimilated Zn and Cu below the FAO/WHO maximum permissible value. But Pb and Cd concentrations in leaf and curd exceeded the FAO/WHO maximum permissible value, except Pb concentration in curd from control and 5 Mg ha-1 BS application. Cr concentration was below the FAO/WHO maximum permissible value in curd; whereas the concentration in leaf surpassed the maximum permissible value except in unamended soil and 5 Mg ha-1 BS application. Thus, this study highlights the risk involved in consumption of cauliflower receiving brewery sludge and likelihood of human exposure to heavy metals.

Keywords


Brewery Sludge, Heavy Metals, Leaf, Curd

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