Table 4.
The effects of CR and ORF cultivation patterns on the macronutrient availabilities in the soil (extracted with 1 M ammonium acetate), concentrations in the straw and grain at 2013 and 2014. 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.
| 2013 | 2014 | ||||
|---|---|---|---|---|---|
| CR | ORF | CR | ORF | ||
| g kg−1 | g kg−1 | ||||
| P | Soil | 0.073b | 0.15a | 0.12b | 0.21a |
| Straw | 1.52a | 1.54a | 1.54b | 2.84a | |
| Grain | 2.12b | 3.14a | 2.07b | 3.27a | |
| K | Soil | 0.066a | 0.062a | 0.045a | 0.057a |
| Straw | 8.67a | 11.05a | 15.86a | 13.75a | |
| Grain | 2.56a | 2.93a | 2.08a | 2.23a | |
| Ca | Soil | 1.79a | 1.13b | 1.82a | 1.12b |
| Straw | 5.32a | 6.22a | 5.08a | 4.97a | |
| Grain | 0.23a | 0.14b | 0.37a | 0.23b | |
| Mg | Soil | 0.21a | 0.23a | 0.25a | 0.31a |
| Straw | 1.31a | 1.73a | 2.36a | 2.46a | |
| Grain | 0.96a | 0.92a | 0.95a | 1.08a | |