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.

From: Variations in nutrient and trace element composition of rice in an organic rice-frog coculture system

  

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

  1. 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.
Back to article page