Table 3.
Maize yield and yield components with different N control measures.
| Treatments | Nitrogen fertilizer (kg ha-1) | Bald tip length (cm) | Ear diameter (cm) | Ear length (cm) | Grain number per ear | 100-grain weight (g) | Grain yield (kg ha-1) |
|---|---|---|---|---|---|---|---|
| CK | 0 | 1.08a | 4.48b | 14.2b | 449b | 27.0a | 6849c |
| FN | 392 | 0.62b | 4.62ab | 15.2ab | 507a | 27.9a | 8009b |
| RN | 300 | 0.74b | 4.68a | 15.7a | 515a | 28.0a | 8896ab |
| CRF | 300 | 0.62b | 4.66a | 15.1ab | 511a | 29.2a | 8122b |
| CRF80% | 240 | 0.66b | 4.63ab | 15.9a | 538a | 29.8a | 9381a |
| RN80%+DCD | 240 | 0.72b | 4.66a | 15.2ab | 515a | 29.9a | 9196ab |
| RN80%+NC | 240 | 0.83b | 4.63ab | 15.1ab | 519a | 27.6a | 8045b |
Treatments of CK, FN, RN, CRF, CRF80%, RN80%+DCD and RN80%+NC represent the corresponding treatments as described in Table 1. Means followed by different letters in the same column indicate significant differences between treatments according to one-way ANOVA followed by Duncan’s multiple range test (P ≤ 0.05).