Table 1.
Growth and morphological parameters were determined with both rootstocks in all treatments (different nitrogen forms and Fe supply levels)
| Treatment | Shoot length | Specific leaf area (SLA) | Growth rate | Shoot | Leaves | Root | Relative growth rate | Root/shoot ratio | |
|---|---|---|---|---|---|---|---|---|---|
| (cm) | (cm2 g− 1 DM) | (cm d− 1) | dry weight | dry weight | dry weight | (g g− 1 d− 1) | |||
| (g) | (g) | (g) | |||||||
| 3309 C | N1A0 / +Fe | 104.8 ± 29.8 b | 395.85 ± 90.3 ab | 3.74 ± 1.1 b | 8.93 ± 3.2 a | 2.95 ± 0.6 ab | 1.00 ± 0.3 a | 0.027 ± 0.01 ab | 0.090 ± 0.03 a |
| N1A0 / -Fe | 83.8 ± 22.3 b | 345.51 ± 120.8 ab | 2.99 ± 0.8 b | 7.45 ± 2.2 a | 1.07 ± 0.3 b | 0.92 ± 0.1 a | 0.020 ± 0.01 b | 0.111 ± 0.03 a | |
| N1A1 / +Fe | 152.0 ± 13.1 a | 408.21 ± 46.1 b | 5.42 ± 0.5 a | 10.92 ± 1.8 a | 3.83 ± 1.0 a | 1.11 ± 0.2 a | 0.034 ± 0.01 a | 0.074 ± 0.01 a | |
| N1A1 / -Fe | 96.9 ± 13.8 b | 347.69 ± 64.6 a | 3.46 ± 0.5 b | 8.13 ± 1.6 a | 2.45 ± 0.9 ab | 1.08 ± 0.4 a | 0.026 ± 0.01 ab | 0.099 ± 0.02 a | |
| Welch-ANOVA | F(3, 8.582) = 16.670, p = 0.001 | * F(3, 40.119) = 4.570, p = 0.008 | F(3, 8.566) = 16.744, p = 0.001 | F(3, 8.701) = 2.671, p = 0.113 | F(3, 7.474) = 12.019, p = 0.003 | F(3, 8.376) = 1.037, p = 0.425 | F(3, 8.736) = 3.607, p = 0.060 | F(3, 7.704) = 4.183, p = 0.049 | |
| Fercal | N1A0 / +Fe | 59.3 ± 18.0 a | 262.91 ± 61.4 b | 2.12 ± 0.6 a | 9.33 ± 2.5 ab | 1.43 ± 0.6 b | 0.59 ± 0.3 b | 0.013 ± 0.01 ab | 0.070 ± 0.01 a |
| N1A0 / -Fe | 45.5 ± 9.0 a | 319.93 ± 58.3 ab | 1.63 ± 0.3 a | 7.09 ± 0.9 b | 1.55 ± 0.1 b | 0.48 ± 0.3 b | 0.005 ± 0.00 b | 0.082 ± 0.04 a | |
| N1A1 / +Fe | 96.1 ± 30.0 a | 368.68 ± 115.1 a | 3.43 ± 1.1 a | 7.95 ± 2.3 b | 2.70 ± 1.0 ab | 0.84 ± 0.2 b | 0.012 ± 0.01 ab | 0.075 ± 0.01 a | |
| N1A1 / -Fe | 119.4 ± 42.0 a | 385.21 ± 98.6 a | 4.26 ± 1.5 a | 13.28 ± 0.9 a | 4.65 ± 1.0 a | 2.12 ± 0.6 a | 0.024 ± 0.00 a | 0.113 ± 0.02 a | |
| Welch-ANOVA | * F(3, 7.025) = 5.227, p = 0.033 | F(3, 29.856) = 6.564, p = 0.002 | * F(3, 6.976) = 4.989, p = 0.037 | F(3, 4.739) = 22.969, p = 0.003 | F(3, 3.977) = 7.461, p = 0.041 | F(3, 5.977) = 5.683, p = 0.035 | * F(3, 5.017) = 33.376, p = 0.001 | F(3, 5.294) = 3.065, p = 0.124 |
Presented values are mean values with standard error. Significant differences between treatments for each rootstock are indicated with different letters. (α < 0.05, Welch-ANOVA and Tukey or Games-Howell post hoc test, N = 5 per treatment and rootstock)
* significant LeveneTest