Table 2 Enzymatic activities (mmol h−1 g−1 dry weight basis) of raw manure over time (C-0, C-3, C-6) and vermicomposts after 1 (T-1), 3 (T-3), 5 (T-5) and 6 days (T-6) during swine manure vermicomposting. Four hydrolytic enzymes involved in carbon, nitrogen and phosphorus cycling were investigated in this study, including β-1,4-glucosidase (βG), cellobiohydrolase (CBH), β-1,4-N-acetylglucosaminidase (NAG) and acid phosphatase (AP)
βG | CBH | NAG | AP | |||||
|---|---|---|---|---|---|---|---|---|
Treatment | Value | Ratio* | Value | Ratio | Value | Ratio | Value | Ratio |
C-0 | 294 ± 23bc | --- | 633 ± 57b | --- | 534 ± 93b | --- | 34.8 ± 0.7c | --- |
C-3 | 312 ± 48bc | 0.06 | 607 ± 35b | ± 0.04 | 558 ± 55b | 0.04 | 40.4 ± 3.5c | 0.16 |
C-6 | 388 ± 26b | 0.32 | 628 ± 41b | −0.01 | 512 ± 32b | −0.04 | 38.6 ± 9.6c | 0.11 |
T-1 | 251 ± 11c | −0.15 | 758 ± 61a | 0.20 | 722 ± 49a | 0.35 | 65.5 ± 6.5a | 0.86 |
T-3 | 377 ± 35b | 0.28 | 749 ± 6a | 0.18 | 653 ± 24ab | 0.22 | 51.2 ± 1.3b | 0.47 |
T-5 | 525 ± 40a | 0.79 | 641 ± 26ab | 0.01 | 545 ± 13b | 0.02 | 47.9 ± 2.5b | 0.38 |
T-6 | 369 ± 1b | 0.19 | 535 ± 29c | −0.15 | 207 ± 28c | −0.61 | 25.9 ± 0.1d | −0.26 |