Table 3.
Diversity and evenness indices, and mean optical density of grouped substrates (six groups) at 96 h incubation time in different treatments
| Control soil | Plant cane soil | Ratoon cane soil | P values | |
|---|---|---|---|---|
| Shannon’s diversity index |
4.190±0.03c |
4.393±0.01a |
4.273±0.02b |
0.0003 |
| Shannon’s evenness |
0.85±0.01b |
0.89±0.01a |
0.85±0.01b |
0.001 |
| Mean OD |
0.20±0.06c |
0.90±0.09a |
0.42±0.06b |
0.0001 |
| Polymers |
0.12±0.03b |
0.37±0.07a |
0.30±0.08a |
0.008 |
| Carbohydrates |
0.18±0.02b |
1.31±0.12a |
0.28±0.03b |
0.0001 |
| Carboxylic acids |
0.10±0.04b |
0.70±0.15a |
0.65±0.08a |
0.0007 |
| Amino acids |
0.20±0.05c |
0.81±0.11a |
0.59±0.07b |
0.0003 |
| Amines |
0.11±0.02b |
1.16±0.08a |
0.12±0.03b |
0.0001 |
| Phenolic compounds | 0.84±0.05a | 0.53±0.03b | 0.39±0.02c | 0.0001 |
Note: Data are means ± SD. Different letters in rows show significant differences determined by Tucky’s test (P ≤ 0.05).