Research Article
Isolation and Characterization of Biosurfactant-Producing Bacteria from Amapaense Amazon Soils
Table 1
Chemical and physical characteristics of soil samples from the different studied ecosystems.
| | Characteristics of the soil samples | Ecosystem codes | | FGU | FGF | PGU | PGF | MZU | MZF |
| | pH | 4.6 | 5.5 | 4.9 | 5.1 | 4.3 | 4.2 | | Organic matter (mg·kg−1) | 3.55 × 103 | 1.05 × 105 | 2.50 × 104 | 4.55 × 104 | 6.45 × 104 | 4.62 × 104 | | Phosphorus (mg·m−3) | 3.00 × 103 | 4.00 × 103 | 5.00 × 103 | 6.00 × 103 | 2.00 × 103 | 2.00 × 103 | | K+ (mg·m−3) | 1.96 × 104 | 1.96 × 104 | 2.35 × 104 | 2.74 × 104 | 2.35 × 104 | 2.35 × 104 | | Ca2+ + Mg2+ (mg·m−3) | 9.73 × 104 | 9.73 × 104 | 8.51 × 104 | 1.09 × 105 | 6.08 × 104 | 4.86 × 104 | | Ca2+ (mg·m−3) | — | 1.20 × 105 | — | — | — | — | | Al (mg·m−3) | 1.44 × 105 | 6.30 × 104 | 9.89 × 104 | 1.35 × 105 | 1.98 × 105 | 3.24 × 105 | | H+ + Al3+ (mg·m−3) | 2.14 × 105 | 1.80 × 105 | 1.48 × 105 | 2.24 × 105 | 2.96 × 105 | 4.18 × 105 | | SB (mg·m−3) | 1.17 × 105 | 1.17 × 105 | 1.09 × 105 | 1.37 × 105 | 8.42 × 104 | 7.21 × 104 | | CEC● (mg·m−3) | 3.31 × 105 | 2.97 × 105 | 2.57 × 105 | 3.60 × 105 | 3.80 × 105 | 4.90 × 105 | | Base saturation (%) | 9 | 10 | 12 | 9 | 5 | 4 | | Al3+ saturation (%) | 64 | 33 | 58 | 60 | 79 | 88 | | Clay (%) | 10.1 | 34.9 | 19.8 | 17.4 | 35.9 | 25.3 | | Coarse sand (%) | 62.5 | 0 | 48.0 | 37.5 | 10.5 | 24.5 | | Fine sand (%) | 16.5 | 0 | 24.0 | 17.0 | 9.5 | 14.0 | | Silt (%) | 10.9 | 65.1 | 8.2 | 28.1 | 44.1 | 36.2 | | BSSC♦ | Sandy loam | Silty clay loam | Sandy loam | Sandy loam | Clay loam | Sandy |
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♦Brazilian System of Soil Classification; SB = Ca 2+ + Mg 2+ + K +; ●CEC = SB + H + + Al 3+. |
