| Treatments | Spikelets panicle−1 | Filled spikelets hill−1 | Unfilled spikelets hill−1 | Total spikelets hill−1 | Grain filling % | Grain wt. hill−1 (g) | 1000-grain wt. (g) | Grain yield (t∙ha−1) |
| Seedling age effect | ||||||||
| 45 d seedlings | 67.7 B | 1375 B | 173 A | 1548 B | 88.8 | 44.955 | 30.155 | 3.093 B |
| 60 d seedlings | 84.2 A | 1457 A | 148 B | 1605 B | 90.8 | 46.1 | 31.175 | 3.519 A |
|
| ** | * | * | * | NS | NS | NS | * |
| Planting system | ||||||||
| FP (≈ 50.6 cm) | 72.3 B | 1285 B | 165 | 1449 B | 88.6 | 88.647 | 30.44 | 3.065 B |
| Row (40 cm × 20 cm) | 79.7 A | 1547 A | 156 | 1703 A | 90.8 | 90.837 | 30.89 | 3.447 A |
|
| * | ** | NS | ** | NS | NS | NS | * |
| Seedling age × planting system | ||||||||
| 45 d, FP | 65.4 | 1467 AB | 207 AB | 1674 AB | 87.6 | 48.81A | 30.03 | 2.991 C |
| 45 d, Row planting (40 × 20 cm) | 70.0 | 1242 B | 138 B | 1420 B | 90.3
| 41.1 B | 30.28 | 3.195 BC |
| 60 d, FP | 79.1 | 1102 B | 122 B | 1224 B | 90.0 | 36.2 B | 30.85 | 3.340 B |
| 60 d, Row planting (40 × 20 cm) | 89.3 | 1811 A | 174 A | 1985 A | 91.2 | 52.0 A | 31.50 | 3.698 A |
|
| ** | ** | ** | ** | NS | * | NS | * |