Table 2.
Soil enzyme activities in rhizospheric soils from the study sites
| Invertase a | Urease b | Phosphomonoesterase c | Polyphenol oxidase d | Peroxidase d | |
|---|---|---|---|---|---|
| Control soil |
0.21±0.034b |
0.020±0.0009c |
0.12±0.0091c |
0.85±0.074a |
1.91±0.101b |
| Plant cane soil |
0.62±0.033a |
0.047±0.0023a |
0.41±0.0042a |
1.18±0.074a |
2.50±0.208a |
| Ratoon cane soil | 0.33±0.020b | 0.038±0.0013b | 0.27±0.0108b | 0.88±0.164a | 1.88±0.024b |
Note: Data are means ± SE. Different letters in columns show significant differences determined by Tucky’s test (P ≤ 0.05). a μmol glucose g-1 soil h-1; b μmol urea g-1 soil h-1; c μmol p-nitrophenol g-1 soil h-1; d μmol pyrogallol g-1 soil h-1.