Table 7.
System productivity, output energy, and input–output energy relationship influenced by cropping system, residue management, and TCE practices (2-year mean)
| Treatment | Input energy (MJ ha−1) |
Output energy (MJ ha−1) |
Net energy return (MJ ha−1) |
Energy ratio | Energy productivity (kg MJ−1) |
|---|---|---|---|---|---|
| Cropping system | |||||
| Rice–wheat | 97,844 | 351,253b | 253,409b | 4.04b | 0.115b |
| Rice–maize | 97,906 | 393,643a | 295,737a | 4.61a | 0.139a |
| Residue management | |||||
| Residue removal | 63,211 | 356,469b | 293,258a | 5.72a | 0.168a |
| Residue retention | 132,539 | 388,427a | 255,888b | 2.93b | 0.086b |
| TCE practice | |||||
| CTTPR-CT | 105,470 | 342,559d | 237,089c | 3.53c | 0.104c |
| NPTPR-ZT | 93,947 | 365,606c | 271,658b | 4.41b | 0.128b |
| ZTTPR-ZT | 94,198 | 384,498b | 290,300a | 4.70a | 0.139a |
| ZTDSR-ZT | 97,885 | 397,129a | 299,243a | 4.67a | 0.137a |
a–d different letters in continuous column are significantly different at p ≤ 0.05