Year | Treatment | CH4 emission factor (kg ha−1 day−1) | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Straw addition | Application season | Application method | Noeun (SCL) | Jukdong (SL) | Wanju (L) | Gimje (SiCL) | Jinju (CL) | Sacheon (SiL) | Mean | |
1st | No straw | – | – | 2.21b | 2.87c | 3.71b | 3.99b | 1.40b | 1.58c | 2.63b |
Straw | Spring | – | 3.46a | 5.87a | 5.92a | 7.26a | 4.42a | 5.39a | 5.39a | |
Straw | Autumn | Spreading | 3.66a | 4.47b | 4.56b | 3.47b | 4.54a | 6.11a | 4.47a | |
Straw | Autumn | Mixing | 2.50b | 2.57c | 3.62b | 2.92b | 2.96ab | 4.55ab | 3.19b | |
2nd | No straw | – | – | 1.88c | 2.23c | 2.59c | 3.57c | 2.64c | 3.38c | 2.71c |
Straw | Spring | – | 4.49a | 4.34a | 8.10a | 10.13a | 5.79a | 6.83a | 6.61a | |
Straw | Autumn | Spreading | 2.99b | 3.50b | 6.15ab | 5.08b | 4.35ab | 4.88ab | 4.49b | |
Straw | Autumn | Mixing | 2.36bc | 2.15c | 5.64b | 4.16bc | 3.87bc | 3.78bc | 3.66bc | |
Mean | No straw | – | – | 2.05b | 2.55b | 3.15c | 3.78b | 2.02c | 2.48c | 2.67c |
Straw | Spring | – | 3.98a | 5.10a | 7.01a | 8.70a | 5.11a | 6.11a | 5.94a | |
Straw | Autumn | Spreading | 3.32a | 3.98a | 5.36ab | 4.28b | 4.44a | 5.50a | 4.51b | |
Straw | Autumn | Mixing | 2.43b | 2.36b | 4.63bc | 3.54b | 3.41b | 4.16b | 3.42c | |
Statistical analysis | ||||||||||
 Year (A) | ns | *** | *** | *** | *** | ns | * | |||
 Treatment (B) | *** | *** | *** | *** | *** | *** | *** | |||
 A × B | *** | *** | *** | *** | ns | *** | ns |