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Effect of S32 on the organic acid release in ES.
| Treatment | Oxalic acid (mM) | Citric acid (mM) | Malic acid (mM) |
| S32 | 93.25 ± 4.02∗ | 52.66 ± 5.88 | 83.14 ± 14.10*** |
| PC | 78.14 ± 6.84 | 51.20 ± 5.08 | 5.26 ± 3.68 |
| NC | 69.00 ± 4.03 | 25.35 ± 2.31 | 9.25 ± 2.75 |
ES, experimental soil; RS, reclaimed soil; PC, positive control; B. megaterium As1.223; NC, negative control. ∗P < 0.05; ∗∗∗P < 0.001 compared to NC.
