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.

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