Table 2.
Effects of spraying ethephon on internode length (cm) of summer maize.
| Year | Treatment | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|
| 2020 | LCK | 7.5 bc | 10.3 c | 13.4 c | 15.5 d | 17.4 cd |
| MCK | 8.2 b | 11.6 b | 14.2 b | 16.7 b | 18.4 b | |
| ME | 6.9 c | 10.0 c | 12.9 c | 15.5 d | 16.7 d | |
| HCK | 9.4 a | 12.8 a | 15.4 a | 18.0 a | 19.5 a | |
| HE | 7.8 b | 10.4 c | 13.0 c | 16.0 c | 17.7 bc | |
| 2021 | LCK | 5.9 b | 9.2 c | 12.0 c | 14.0 c | 15.4 cd |
| MCK | 6.3 b | 10.4 b | 13.5 b | 15.3 b | 16.5 b | |
| ME | 5.8 b | 8.9 c | 11.9 c | 13.8 c | 14.9 d | |
| HCK | 7.4 a | 11.5 a | 14.5 a | 16.1 a | 17.9 a | |
| HE | 6.2 b | 9.0 c | 12.0 c | 13.9 c | 15.7 b | |
| ANOVA | ||||||
| Year (Y) | ** | ** | ** | ** | ** | |
| Density (D) | ** | ** | ** | ** | ** | |
| Ethephon (E) | ** | ** | ** | ** | ** | |
| Y × D | ns | ns | ns | ns | ns | |
| Y × E | ns | ns | ns | ns | ns | |
| D × E | ns | ** | ** | ** | ns | |
| Y × D × E | ns | ns | ns | ns | ns | |
LCK, MCK, ME, HCK and HE were the treatments of low density control, medium density control, medium density sprayed with ethephon, high density control and high density sprayed with ethephon, respectively. Different lowercase letters in the table indicated significant difference at 5% level. ns, no significance. **, significant at 0.01 probability level.