Table 2.
Numbers of CFU of hydrocarbonoclastic bacteria in oil-saturated desert soil (OSS) and OSS diluted with pristine desert and garden soils.
| End of month | Outdoor temperature (min-max °C) | Numbers of CFU g−1 (×106) ± standard deviation values | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Oil-saturated soil (OSS) | OSS diluted with pristine desert soil | OSS diluted with pristine garden soil | |||||||
| I | II | III | I | II | III | ||||
| 0 | March | 22–34 | 2.7 ± 0.1 | 1.7 ± 0.1 | 1.9 ± 0.1 | 1.8 ± 0.05 | 1.3 ± 0.1 | 1.3 ± 0.05 | 1.1 ± 0.0 |
| 1 | April | 26–44 | 487.5 ± 16.2 | 164.0 ± 12.2 | 38.3 ± 2.1 | 36.3 ± 1.1 | 31.0 ± 2.1 | 70.0 ± 2.0 | 356.0 ± 20.0 |
| 2 | May | 34–46 | 10.5 ± 1.0 | 15.7 ± 0.9 | 14.4 ± 1.0 | 76.5 ± 4.0 | 15.8 ± 1.2 | 22.3 ± 1.1 | 64.5 ± 11.1 |
| 3 | June | 39–50 | 4.1 ± 0.8 | 1.7 ± 0.05 | 3.7 ± 1.0 | 11.4 ± 1.0 | 4.2 ± 0.5 | 38.0 ± 2.4 | 17.5 ± 2.1 |
| 4 | July | 44–51 | 0.9 ± 0.0 | 2.5 ± 0.08 | 25.4 ± 1.2 | 153.0 ± 12.1 | 84.5 ± 2.3 | 69.5 ± 5.1 | 114.0 ± 6.2 |
| 5 | August | 42–51 | 0.8 ± 0.05 | 1.0 ± 0.0 | 56.5 ± 2.0 | 125.0 ± 10.0 | 18.5 ± 1.5 | 197.0 ± 10.2 | 386.5 ± 15.3 |
| 6 | September | 39–47 | 1.7 ± 0.1 | 1.2 ± 0.06 | 55.7 ± 2.0 | 128.1 ± 10.0 | 14.2 ± 1.0 | 110.0 ± 11.0 | 58.5 ± 5.3 |
I, II and III; 1 kg OSS mixed with 0.25, 0.50 and 0.75 kg pristine soil, respectively.