Table 2.
Effect of Se on the biomass in shoots and height of upland rice (DOURADOAGULHA and SINALOAA68) grown on soils containing different concentrations of arsenic (S1 = 20.1 mg × kg−1, S2 = 65.2 mg × kg−1, S3 = 83.9 mg × kg−1).
| Soils | Se Treatments (mg × L−1) | DOURADOAGULHA | SINALOAA68 | ||
|---|---|---|---|---|---|
| Shoot Fresh Weight (g × plant−1) | Plant Height (cm) | Shoot Fresh Weight (g × plant−1) | Plant Height (cm) | ||
| S1 | Se0 | 14.37 ± 0.66 a | 83.87 ± 4.44 a | 24.01 ± 1.98 a | 106.47 ± 11.48 a |
| Se1 | 15.16 ± 0.30 a | 85.67 ± 3.26 a | 23.19 ± 1.52 a | 98.33 ± 2.08 a | |
| Se5 | 11.11 ± 0.37 b | 87.33 ± 0.29 a | 18.05 ± 0.25 b | 89.00 ± 2.65 b | |
| S2 | Se0 | 6.09 ± 0.61 d | 67.67 ± 3.79 b | 7.43 ± 0.08 d | 65.67 ± 2.52 c,d |
| Se1 | 7.50 ± 0.57 c | 69.33 ± 3.51 b | 10.87 ± 1.26 c | 72.67 ± 2.08 c | |
| Se5 | 6.18 ± 0.35 d | 69.67 ± 5.51 b | 7.89 ± 0.57 d | 68.33 ± 3.51 c,d | |
| S3 | Se0 | 1.44 ± 0.00 e | 58.00 ± 6.08 c | 1.64 ± 0.13 e | 54.33 ± 6.43 e |
| Se1 | 1.97 ± 0.18 e | 67.67 ± 2.08 b | 2.54 ± 0.03 e | 60.00 ± 2.00 d,e | |
| Se5 | 1.29 ± 0.24 e | 53.33 ± 2.08 c | 2.62 ± 0.23 e | 36.00 ± 4.58 f | |
| Significance level (p values) | |||||
| Soils | ** | ** | ** | ** | |
| Se treatments | ** | NS | ** | NS | |
| Soils * Se treatments | ** | * | ** | ** | |
Values represent means ± standard deviations of the three replicates per treatment. Different letters (a to f) indicate significant difference between treatments at p ≤ 0.05. * and ** indicate significant differences at p ≤ 0.05 and 0.01, respectively. NS means no significant difference at the 0.05 level of probability.