You have no items in your shopping cart.
ABSTRACT
This trial is focused on the potential of liquid organic fertilizer as bioremediant for spent engine oil polluted soils conducted in the Screen House of the Department of Crop Science, Faculty of Agriculture, University of Benin. This study involved three concentrations of spent engine oil pollution (0, 5 and 10 % w/w, spent engine oil in 10kg soil) and four liquid organic fertilizers types (water (control), cattle dung, poultry manure and rabbit manure) laid out in a 3 x 4 factorial arrangement and fitted into completely randomized design (CRD) with three replications. Data were collected on plant height, stem girth, number of leaves and leaf area at at two, four and six weeks after sowing both fresh and dry yield were estimated at six weeks after sowing. Soil analysis showed that Soil pH was significantly (p<0.05) reduced with increase in spent engine oil pollution. However, organic C and Heavy metals (Cr. Cd and Pb) concentration increased with increasing concentration of spent engine oil pollution Soil pollution adversely affected number of leaves, leaf area, stem girth and herbage yield. Growth and herbage yield were significantly (p<0.05) higher in liquid organic fertilizer amended spent engine oil polluted soil than with soils without amendment. The highest herbage yield (13.30 t ha-1 ) was obtained from unpolluted soil. Rabbit manure amended plants had the highest fresh herbage (12.49 t ha-1 ) which was similar with liquid poultry manure treated plant yield (12,21 t ha-1 ). Spent engine oil unpolluted soil supplied with rabbit manure had the herbage yield of 20.49 t ha-1 . However, poultry and rabbit manures had similar dry weight values. Hence poultry and rabbit manures are thereby suggested for the bioremediation of spent engine oil polluted soils.
