Table 2.
Factors and values used in the estimation of CH4 emission from paddy cultivation
| Factor | Value | Reference | Source | |
|---|---|---|---|---|
| Annual harvested area (ha) | A | 29,173 | Includes two seasons | (MOSL 2018) |
| Cultivation period of rice (days) | t | 112 | Average in the study area | (MOSL 2018) |
| Baseline emission factor for continuously flooded fields without organic amendment (kg CH4 ha−1 d−1) | EFC | 0.85 | Value for South Asia | Table 5.1 (IPCC 2019) |
| Scaling factor to account for the differences in water regime during the cultivation period | SFW | 0.55 | Irrigated with multiple drainage periods | Table 5.12 (IPCC 2019) |
| Scaling factor to account for the differences in water regime in the pre-season before the cultivation period | SFP | 1 | Non-flooded pre-season < 180 days | Table 5.13 (IPCC 2019) |
| Application rate of organic amendment (t ha−1) | ROAi | Assume 80% of rice straw is returned | (MOSL 2018) | |
| Crop residue | 5.64 | |||
| Compost | 10 | |||
| Conversion factor for organic amendment | CFOAi | Straw incorporated long (> 30 days) before cultivation | Table 5.14 (IPCC 2019) | |
| Crop residue | 0.19 | |||
| Compost | 0.17 | |||