Vol. 19 No. 2
Evaluation of oil sludge vermicompost for integrated nutrient management in rain fed wetland rice (Oryza sativa L.): SAMOE, FIAM and Fuzzy TOPSIS approach
Author(s): S. SARKAR, S. GHOSH, S. BANERJEE AND P. BHATTACHARYYA
Abstract: In present study, the Periyonix excavate and Eisenia fetida-mediated oil sludge-vermicompost was used for crop trial by taking rice (Oryza sativa L.) as a tested crop. An improved soil quality with significant improvement in nutrient status was resulted, furthermore, significant reduction in solubility of toxic metals (Cr, Ni, Pb) and minuscule amount of metal was detected in the root portion part of rice plant. Cr, Ni and Pb was detected in edible parts under raw oil sludge treatment. The FIAM modelling ensures positive transport of grain uptake of toxic metal (Cr, Ni, Pb) in presence of oil sludge. The SAMOE risk thermometer indicated a high-risk hazard in oil sludge treatment. Fuzzy-TOPSIS analysis also predicted the highest synergetic performance score and rank for the concentration of heavy metals in oil sludge treatment. Moreover, the composite treatment (VC 50%+NPK50%) attributed profuse yield of rice hence could be an alternative agronomic practice.
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