Table 3.
Microbial EPS concentration (based upon biomass-ATP and colorimetric analyses of EPS extracts).
| Treatment | ATP before EPS extraction* (nmol g−1 soil) | ATP after EPS extraction* (nmol g−1 soil) | EPS-polysaccharide (μg nmol−1 ATP) | EPS-protein (μg nmol−1 ATP) |
|---|---|---|---|---|
| 0 | 5.42 ± 0.13b | 4.61 ± 0.59b | 86.55y | 32.56f |
| C | 4.09 ± 0.74b | 4.72 ± 0.16b | 143.92x | 49.95e |
| N | 5.27 ± 0.51b | 4.37 ± 0.46b | 91.54y | 33.42f |
| CN | 11.84 ± 3.18a | 9.69 ± 0.59a | 48.12z | 19.79g |
ab xyz efg means with same letter are not statistically different.
l.s.d's (α=0.05): ATP treatment effect = 1.60 nmol g−1 soil; EPS-polysaccharide = 21.6 μg nmol−1 ATP; EPS-protein = 8.7 μg nmol−1 ATP.
No statistically significant effect of comparison ATP before vs. after EPS extraction (P = 0.13).