Authors: .J. K. Adesodun , A. A. Soretire and C. O. Oyegoke
Nigerian Journal of Soil Science 20 (1) 2010
Abstract
This study evaluated the usefulness of cow dung. Poultry manure and pig waste in remediating oil-pouted soils using soybean as bioindicator. The soils were contaminated with 5000 mg kg, 25000 mg kg-‘ and 50000 mg kg oil and amended with lOt ha-‘ cow dung, poultry manure and pig waste. Results showed that total hydrocarbon was reduced with addition of cow dung, poultry manure and pig waste. Soy bean response showed that there
were increases in percentage germination, leaf area, height, module formation and pods/plant with organic wastes treatment in the first year; whereas, dry matter and grain yields increased in soil amended with only organic wastes while oil led to reduction following lower a repeat application of spent oil in the second year. Growth in the second and third years was Jower than in the first year with 110 grain yields in oil-polluted plots_ However, grain yields were obtained in the plots in the 4th year indicating improvement in soil recovery after the third year. The overall performance of the organic waste followed poultry manure> pig waste> cow dung. The result of this study suggests that: poultry manure was better in ameliorating the adverse effect of waste oil.
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