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Details of experimental treatments.
| Crop establishment method | Nitrogen levels kg N ha−1 | Age of seedling (d) | Spacing (cm) | Number of seedling hill−1 | Plant density (m−2) |
|---|---|---|---|---|---|
| SRI | ABC | 10 | 25 × 25 | 1 | 256 (16) |
| 0N | |||||
| 60N | |||||
| 90N | |||||
| 120N | |||||
| 150N | |||||
| Conventional | ABC | 25 | 20 × 20 | 3 | 400 (25) |
| 0N | |||||
| 60N | |||||
| 90N | |||||
| 120N | |||||
| 150N |
Key: SRI = System of rice intensification; ABC = absolute control. Values in parenthesis under the column of plant density are numbers of hill per unit area (m−2) in respective plots.
