TABLE 3.
Yield and yield components from 2017, 2018, and 2019 in Suizhou.
| Year (Y) | Treatment (T) | GY (t ha–1) | P (m2) | SP | GF (%) | GW (mg) | HI (%) |
| 2017 | CK | 8.14 d | 177 d | 201.5 d | 88.2 a | 22.8 a | 51.3 a |
| FP | 9.36 c | 231 c | 226.9 c | 86.7 b | 22.5 b | 48.4 b | |
| OPT–N | 10.65 b | 240 b | 235.9 b | 86.2 b | 22.7 a | 47.4 b | |
| OPT+N | 12.23 a | 270 a | 260.3 a | 84.5 c | 22.5 b | 46.3 c | |
| Mean | 10.7 | 238 | 206.8 | 86.4 | 22.6 | 48.4 | |
| 2018 | CK | 7.77 d | 225 d | 200.6 d | 83.8 a | 20.9 d | 50.4 a |
| FP | 8.99 c | 242 c | 217.1 c | 83.7 a | 21.1 c | 49.8 b | |
| OPT–N | 10.00 b | 255 b | 226.0 b | 83.3 a | 21.6 b | 47.8 c | |
| OPT+N | 11.08 a | 273 a | 235.8 a | 82.6 b | 21.8 a | 47.0 d | |
| Mean | 9.5 | 249 | 219.9 | 83.4 | 21.3 | 48.8 | |
| 2019 | CK | 7.70 d | 225 d | 235.7 c | 78.2 a | 21.8 a | 47.3 c |
| FP | 9.63 c | 263 c | 242.6 bc | 75.8 b | 21.6 ab | 47.9 b | |
| OPT–N | 10.07 b | 312 b | 251.6 b | 76.2 ab | 21.4 ab | 50.2 a | |
| OPT+N | 11.60 a | 330 a | 265.5 a | 76.3 ab | 21.1 b | 47.1 c | |
| Mean | 9.75 | 283 | 248.9 | 76.6 | 21.5 | 48.1 | |
| Analysis of variance | Year (Y) | 15.64** | 7** | 8.74** | 378.68** | 61.96** | 0.42 |
| Treatment (T) | 53.90** | 15** | 14.53** | 0.41 | 0.12 | 5.28** | |
| Y × T | 88.90** | 24** | 769** | 3.03* | 11.44** | 14.29** |
P, panicles; SP, spikelets per panicle; GF, grain-filling; GW, grain weight; HI, harvest index; ns, not significant. Different lowercase letters within columns indicate significant differences at P < 0.05; *P < 0.05; **P < 0.01.