Table 2. Cumulative mineralization of SOC after the 30 days of incubation and parameters of its kinetic equations.
| Treatment | Ct (mg kg−1) | C0 (mg kg−1) | k (d−1) | T1/2 | C0/SOC (%) | R2 |
|---|---|---|---|---|---|---|
| CK | 274.44 c | 257.44 c | 0.1671 a | 4.15 b | 12.78 b | 0.9748** |
| C1 | 517.03 b | 526.05 b | 0.0824 b | 8.41 a | 12.42 b | 0.9643** |
| C2 | 437.22 b | 484.61 b | 0.0697 b | 9.94 a | 13.61 b | 0.9947** |
| C3 | 803.88 a | 936.95 a | 0.0622 b | 11.14 a | 21.25 a | 0.9983** |
** indicates a extremely significant level of 1%.
- CK
- the volume ratio of soft rock to sand is 0:1
- C1
- the volume ratio of soft rock to sand is 1:5
- C2
- the volume ratio of soft rock to sand is 1:2
- C3
- the volume ratio of soft rock to sand is 1:1
Ct for amount of organic carbon cumulative mineralization, C0 for amount of potential mineralizable organic carbon, k for constant of organic carbon mineralization rate, T1∕2 for half turnover period, C0/SOC for ratio of potential mineralizable organic carbon to total organic carbon in compound soil. Values followed by different letters in the same column mean significant difference at 0.05 level between treatments.