Table 3. Effects of irrigation rate, cultivar, and their interaction on selected vegetative growth parameters measured at the anthesis growth stage in two growing seasons.
| Irrigation rate | 2015–2016 | 2016–2017 | ||||||
|---|---|---|---|---|---|---|---|---|
| Cultivars | ||||||||
| Pavon 76 | Sakha 93 | Yecora Rojo | Mean | Pavon 76 | Sakha 93 | Yecora Rojo | Mean | |
| Number of green leaves per plant | ||||||||
| 1.00 ETc | 12.79 a | 12.70 a | 9.90 b | 11.8 A | 13.88 a | 13.77 a | 10.12 b | 12.6 A |
| 0.75 ETc | 9.46 b | 9.11 b | 6.67 d | 8.4 B | 9.88 bc | 8.66 c | 6.80 d | 8.4 B |
| 0.50 ETc | 9.13 b | 8.00 c | 5.96 d | 7.7 B | 9.68 bc | 8.23 c | 5.79 d | 7.9 B |
| Mean | 10.46A | 9.94 A | 7.51 B | 11.14 A | 10.22 A | 7.57 B | ||
| Green leaf area per plant (cm-2) | ||||||||
| 1.00 ETc | 323.7 a | 303.6 a | 254.2 b | 293.8A | 374.4 a | 387.5 a | 242.0 bc | 334.6A |
| 0.75 ETc | 260.4ab | 210.2 c | 193.8cd | 221.5B | 280.5 b | 235.0bcd | 202.1de | 239.2 B |
| 0.50 ETc | 223.9bc | 175.5 d | 139.8 e | 179.7B | 218.8cde | 185.2 ef | 153.5 f | 185.8C |
| Mean | 269.4A | 229.8B | 195.9 C | 291.2 A | 269.2 A | 199.2 B | ||
| Total shoot dry weight per plant (g) | ||||||||
| 1.00 ETc | 9.05ab | 9.20 a | 7.14 cd | 8.46 A | 9.43 a | 9.39 a | 7.41 b | 8.74 A |
| 0.75 ETc | 8.03bc | 6.58 d | 5.15 e | 6.58 B | 7.90 ab | 6.71 b | 5.20 c | 6.61 B |
| 0.50 ETc | 7.02cd | 5.07 e | 4.28 f | 5.46 B | 6.75 b | 5.12 c | 4.55 c | 5.47 C |
| Mean | 8.03 A | 6.95 B | 5.52 C | 8.03 A | 7.08 A | 5.72 B | ||
Means in columns within cultivar as well as means in rows within irrigation rate followed by the same letter are not significantly different at the 0.05 level according to the Duncan’s test.
The main effect of irrigation rates was tested using the first order interaction, replicate × irrigation rate, as the error term. The main effect of cultivars and the interaction between cultivar and irrigation rate were tested using the second order interaction, replicate × irrigation rate × cultivar, as the error term.