Table 6.
The effects of CR and ORF cultivation patterns on the nonessential elements availabilities in the soil (extracted with 1 M ammonium acetate), concentrations in the shoot and seed at 2013 and 2014.
| 2013 | 2014 | ||||
|---|---|---|---|---|---|
| CR | ORF | CR | ORF | ||
| mg kg−1 | mg kg−1 | ||||
| Na | Soil | 67.44a | 72.72a | 63.22b | 100.65a |
| Straw | 14.82a | 17.43a | 481.72b | 561.62a | |
| Grain | 1.65a | 1.47a | 26.69a | 27.82a | |
| Se | Soil | 0.0015b | 0.0060a | 0.0091b | 0.0297a |
| Straw | 0.10a | 0.032b | 0.13a | 0.086b | |
| Grain | 0.010b | 0.041a | 0.019b | 0.055a | |
| Al | Soil | 1.2a | 0.17b | 1.87a | 0.74b |
| Straw | 152.34a | 52.35b | 103.19a | 86.98a | |
| Grain | 4.50a | 1.58b | 4.62a | 1.65b | |
| Sr | Soil | 4.14a | 4.6a | 4.68a | 4.96a |
| Straw | 10.97a | 13.69a | 16.18a | 14.18a | |
| Grain | 0.34a | 0.23a | 0.46a | 0.44a | |
| Cd | Soil | 0.012b | 0.030a | 0.006b | 0.022a |
| Straw | 0.029b | 0.049a | 0.11b | 0.64a | |
| Grain | 0.017b | 0.10a | 0.02b | 0.11a | |
| Ba | Soil | 20.04a | 24.4.0b | 17.58a | 15.36a |
| Straw | 33.97b | 47.90a | 46.47a | 49.16a | |
| Grain | 0.37b | 0.73a | 0.74a | 0.74a | |
| Cr | Soil | 0.0022a | 0.0030a | 0.018a | 0.013a |
| Straw | 6.69b | 10.80a | 23.40a | 19.00b | |
| Grain | 0.20a | 0.0068b | 0.58a | 0.28b | |
| As | Soil | 0.013a | 0.013a | 0.017a | 0.015a |
| Straw | 1.19a | 1.34a | 2.58a | 2.69a | |
| Grain | 0.11a | 0.07a | 0.19a | 0.18a | |
In the table, calculated by ANOVA with Tukey test (p < 0.05), differences between treatments were significantly representing by bold-filled column on the mean ranks with letters (a-b). CR: conventional rice planting system; ORF: organic rice-frog coculture system.