Table 2 Contents of different carbon pools and the proportion to total SOC of the rice soil chronosequence.

From: Long-term rice cultivation stabilizes soil organic carbon and promotes soil microbial activity in a salt marsh derived soil chronosequence

Soil

Carbon pools (g kg−1)

Proportion to SOC (%)

LOC

Fe-OC

HA-OC

POC

LOC/SOC

Fe-OC/SOC

HA-OC/SOC

POC/SOC

P0

4.05 ± 0.42c

0.93 ± 0.27d

0.81 ± 0.11c

0.96 ± 0.01 e

63.43 ± 5.53a

14.70 ± 1.18b

11.88 ± 1.79c

15.19 ± 0.28c

P50

6.34 ± 0.62b

1.71 ± 0.15c

2.95 ± 0.40b

2.95 ± 0.09 d

39.71 ± 3.64b

10.69 ± 0.96c

17.76 ± 2.45bc

18.48 ± 0.52b

P100

7.80 ± 0.51a

2.74 ± 0.29b

3.76 ± 0.18b

3.33 ± 0.06 c

45.68 ± 3.09b

16.03 ± 1.31b

22.00 ± 2.17ab

19.50 ± 0.64b

P300

6.69 ± 0.68ab

3.92 ± 0.49a

4.88 ± 0.73a

4.05 ± 0.11 b

37.22 ± 2.40b

21.81 ± 1.64a

27.05 ± 2.82a

22.53 ± 0.24a

P700

8.07 ± 0.88a

2.81 ± 0.51ab

4.95 ± 0.35a

4.96 ± 0.02 a

37.19 ± 5.71b

12.93 ± 2.34bc

22.81 ± 2.31ab

22.86 ± 0.27a

  1. Note: LOC: labile organic carbon; Fe-OC: iron bound organic carbon; HA-OC: humic acid carbon; POC: particulate organic carbon.
  2. Mean ± SD, n = 3. Different letters in a same column indicate a significant difference (p < 0.05) between soils.
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