Salt | Salinity levels (dS∙m−1) | Equation | ||||
| 1.03 | 2.5 | 4.0 | 5.5 | 7.0 |
|
|
|
| pH |
|
|
|
NaCl | 5.04a | 4.92a | 4.90b | 4.84b | 5.00a | Y = 0.01x2 − 0.14 + 5.17 R2 = 0.8704* |
NaCl + CaCl2 | 5.09a | 5.04a | 5.09a | 5.03a | 5.03a | Y = 5.06ns |
| EC |
| ||||
NaCl | 1.02a | 0.87a | 0.88a | 0.85a | 0.67a | Y = −0.04x + 1.05 R2 = 0.8359** |
NaCl + CaCl2 | 1.00a | 0.85a | 0.83a | 0.66b | 0.61a | Y = −0.06x + 1.05 R2 = 0.9594** |
| Na |
| ||||
NaCl | 1.16a | 1.23a | 1.37a | 1.13a | 0.60a | Y = −0.05x2 + 0.32x + 0.83 R2 = 0.9554** |
NaCl + CaCl2 | 1.12a | 1.12a | 0.78b | 0.68b | 0.61a | Y = −0.09x + 1.25 R2 = 0.8987** |
| Ca |
| ||||
NaCl | 1.32a | 1.61a | 1.59a | 1.68a | 1.78a | Y = 0.06x + 1.33 R2 = 0.8282** |
NaCl + CaCl2 | 1.34a | 1.62a | 1.53a | 1.78a | 1.93a | Y = 0.08x + 1.28 R2 = 0.8624** |
| P |
| ||||
NaCl | 3.81b | 3.83b | 3.80b | 3.83b | 3.84a | Y = 0.004x + 3.807 R2 = 0.4756* |
NaCl + CaCl2 | 3.89a | 3.86a | 3.87a | 3.87a | 3.83a | Y = −0.006x + 3.89 R2 = 0.6047** |
| H + Al |
| ||||
NaCl | 1.11b | 1.04a | 0.95b | 1.01b | 1.15b | Y = 0.01x2 − 0.14x + 1.25 R2 = 0.9238* |
NaCl + CaCl2 | 1.30a | 1.23a | 1.18a | 1.35a | 1.37a | Y = 1.29ns |