Phosphorus source

organism

basal medium1

super phosphate  15.5%2
 

Local phosphorus fertilise P2O52

    ammonium   
    phosphate2

                                          % dégradation

Rhodococcus
sp.Sab

85.50% ± 1.50 BC   (5.70)3

91.75% ± 1.50 AB (6.12)

87.00% ±1.00 ABC  (7.25)

93.00% ± 1.00 AB (6.20)

Consortiuma

94.50% ± 1.50 AB (6.36)

97.00% ± 1.00  A (6.47)

90.00% ± 2.00 B (6.00)

87.25% ± 0.75 ABC  (5.82)

Pseudomonas
sp. Sb

84.00% ± 1.00 C (5.60)

84.50% ± 1.50 C  (5.63)

88.25% ± 1.25 ABC  (5.88)

70.25% ±  0.75 D (4.68)
1Local urea was used as nitrogen source
2Phosphorus sources in the basal medium were substituted by the sources mentioned in table 3
3Degradation rate
Same capital letters are not statistically different among phosphorus sources at p<0.01± standard error (n=2) Same small letters are not statistically different among microorganisms at p<0.01± standard error (n=2)
Table 4: effect of some phosphorus sources on crudeoil biodegradation by the chosen bacterial strains after 15 days of incubation.