N fertilizer | Grain yield† | |
Undrained | Tile-drained | |
--------------Mg∙ha−1-------------- | ||
2012 |
|
|
Urea180 | 7.46 ± 0.81 a | 8.10 ± 0.82 a |
Urea224 | 6.84 ± 0.72 a | 7.53 ± 0.92 a |
Urea224 + NP | 7.56 ± 1.09 a | 6.42 ± 0.49 a |
Split (Urea112 + UAN112) | 7.71 ± 1.01 a | 7.38 ± 0.37 a |
LSD (P ≤ 0.05)‡ | NS§ | NS |
2013 | ||
Control | 5.97 ± 0.41 b | 6.01 ± 0.27 b |
Urea134 | 8.79 ± 0.37 a | 8.33 ± 0.57 a |
Urea134 + NP | 8.65 ± 0.59 a | 8.59 ± 0.68 a |
Split (Urea67 + UAN67) | 7.42 ± 0.19 a | 7.84 ± 0.57 a |
LSD (P ≤ 0.05)‡ | 1.43 | 0.86 |