Table 7.
Effect of different establishment and residue regimes on soil carbon pools at 15–30 cm depth after rice harvest
| Treatments | MBC (mg kg−1) | WBC (g kg−1) | POXC (mg kg−1) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Tillering | Flowering | Harvest | Tillering | Flowering | Harvest | Tillering | Flowering | Harvest | |
| TPR -CTW | 53.8 ± 2.15f | 62.3 ± 0.90f | 55.9 ± 0.58g | 2.87 ± 0.02a | 2.87 ± 0.03a | 2.87 ± 0.01a | 101.9 ± 1.04f | 104.2 ± 1.01f | 104.3 ± 0.55f |
| TPR- CTW (RI) | 60.8 ± 1.76d | 70.0 ± 1.03d | 63.7 ± 1.07d | 2.87 ± 0.03a | 2.87 ± 0.02a | 2.87 ± 0.02a | 102.5 ± 1.79f | 105.5 ± 2.03 f | 105.6 ± 1.78f |
| TPR-ZTW (RR) | 73.7 ± 0.97b | 82.8 ± 2.12b | 76.5 ± 0.74b | 2.87 ± 0.01a | 2.87 ± 0.01a | 2.87 ± 0.02a | 110.3 ± 0.58c | 113.0 ± 0.58 c | 113.0 ± 0.57c |
| TPRAWD - CTW | 53.6 ± 0.76f | 62.8 ± 1.83f | 56.5 ± 0.38f | 2.87 ± 0.01a | 2.87 ± 0.03a | 2.87 ± 0.03a | 104.6 ± 0.64e | 106.9 ± 0.64e | 106.9 ± 0.25e |
| TPRAWD- ZTW (RR) | 75.3 ± 0.77b | 84.4 ± 1.66b | 78.1 ± 0.26b | 2.87 ± 0.02a | 2.87 ± 0.02a | 2.87 ± 0.02a | 114.0 ± 1.31b | 119.2 ± 1.31b | 119.3 ± 0.39b |
| ZTDSR-CTW (RI) | 65.8 ± 0.85c | 75.0 ± 2.62c | 68.7 ± 1.12c | 2.88 ± 0.02a | 2.88 ± 0.02a | 2.88 ± 0.01a | 105.1 ± 1.50d | 109.8 ± 1.51d | 111.9 ± 1.22d |
| ZTDSR-ZTW (RR) | 81.1 ± 3.02a | 90.3 ± 2.42a | 83.9 ± 1.42a | 2.88 ± 0.03a | 2.88 ± 0.02a | 2.88 ± 0.02a | 114.6 ± 1.95a | 120.9 ± 1.96a | 121.0 ± 1.31a |
| ZTDSR - CTW | 56.7 ± 1.96e | 63.6 ± 1.16e | 57.3 ± 0.60e | 2.88 ± 0.02a | 2.88 ± 0.02a | 2.88 ± 0.03a | 104.9 ± 0.56e | 106.8 ± 0.64e | 108.3 ± 1.28e |
Note: TPR: Puddled Transplanted Rice, CTW: Conventionally Tilled Wheat, ZTW: Zero-tilled Wheat, TPRAWD: TPR with Alternate Wetting and Drying, ZTDSR: Zero-tilled Direct Seeded Rice, RI: Residue incorporation and RR: Residue retention; The mean values sharing any common small cap letters under demark no significant differences in between (p > 0.05) and vice-versa