Table 1.
Mean effects of nitrogen source in the nutrient solution and root inoculation with Bradyrhizobium japonicum on growth parameters (maximum values recorded before leaf fall), seed yield and HI of soybean grown in NFT.
| Plant height (cm) | Number of leaves (n. plant-1) | Leaf area (cm2 plant-1) | Above ground total DM (g m-2) | Seed yield (g m-2) | HI (g seed/100 g D.M) | |
|---|---|---|---|---|---|---|
| N sourcea | ||||||
| NO3 | 120.3 | 37.9 | 2759 | 2274.9 | 604.1 | 0.41 |
| U | 94.9 | 18.2 | 1061 | 406.6 | 40.3 | 0.22 |
| Symbiosisb | ||||||
| C | 106.8 | 28.2 | 2076 | 1319.7 | 323.0 | 0.29 |
| I | 108.4 | 27.9 | 1744 | 1361.8 | 321.4 | 0.33 |
| N source | ∗ | ∗ | ∗ | ∗ | ∗ | ∗ |
| Symbiosis | ns | ns | ns | ns | ns | ns |
| Interaction | ns | ns | ns | ns | ns | ns |
Ns, not significant, ∗P ≤ 0.05. aAverage values of non-inoculated and inoculated gullies fertigated with nitrate solution (NO3) and urea solution (U); bAverage values of gullies fertigated with nitrate and urea solutions in non inoculated control (C) and inoculated treatment (I).