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RHIZOBIA EFFICIENCY IN FUEL OIL DEGRADATION AND SOIL BIOLOGICAL PROPERTIES | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 40, Issue 5, 2009, Pages 55-69 | ||
| Authors | ||
| ; ; B.M.S. AL; ; | ||
| Abstract | ||
| Bacterial isolates were collected from root nodules of Phaseolus aureus L. plants grown in soil to study its effect on fuel oil degradation and soil biological properties. Two types of Rhizobium isolates (IB2 and IB10 )and six levels of fuel oil ( 0,1,2,3,4, and % 5) have been used Soil samples (SiCL texture) have incubated for 20,40,60, and 80 days .A completely randomized design was used with three replications. Treatment values were tested by least significant difference.The results showed that the addition of fuel oil and Rhizobium inoculation led to a statistically significant increase in total nitrogin (3.05 g.kg -1) and the total organic carbon (59.93 g.kg -1) That was reflected to increasing organic matter (103.31 g.kg -1) and increasing the C:N ratio of the soil(22.18) and decreasing that resedus (26.55 mg.kg -1) and decreasing the pH (5.47) due to added fuel oil to the soil .However,bacterial growth was etimeted to be (Log 12.36) This was thought to be reflected on increasing activity of fuel oil removal from soil throughout increasing biodegradation. | ||
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