Table 3 Microbial parameters and carbon gain potential 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

MBC (mg kg−1)

BtA (copies × 109 g−1)

FA (copies × 107 g−1)

BtD†

FD†

SR (mgCO2-C g−1)

CG (g kg−1)

NEA

P0

63.41 ± 42.88d

0.40 ± 0.01d

0.88 ± 0.03d

0.80  ± 0.20c

2.16  ± 0.13ab

0.98 ± 0.10c

1.38 ± 0.17c

0.11 ± 0.001e

P50

495.41 ± 33.35ab

5.34 ± 0.58c

2.31 ± 0.18a

2.87  ± 0.27b

1.99  ± 0.05ab

2.50 ± 0.16b

2.14 ± 0.22b

0.16 ± 0.004d

P100

532.44 ± 28.49a

9.95 ± 0.72b

1.66 ± 0.02c

3.43  ± 0.03a

2.07  ± 0.06ab

2.97 ± 0.01a

2.78 ± 0.06a

0.19 ± 0.003c

P300

481.78 ± 21.69b

12.78 ± 2.53b

2.05 ± 0.10b

2.84  ± 0.06b

1.93  ± 0.08b

2.98 ± 0.17a

2.72 ± 0.19a

0.24 ± 0.006b

P700

450.41 ± 12.95c

18.25 ± 1.34a

1.61 ± 0.13c

2.85  ± 0.27b

2.22  ± 0.10a

2.94 ± 0.08a

2.86 ± 0.15a

0.30 ± 0.005a

  1. Note: MBC: microbial biomass carbon; BtA: bacterial gene abundance; FA: fungal gene abundance; BtD: bacterial diversity; FD: fungal diversity; SR: Soil respiration; CG: carbon gain from straw amendment; NEA: normalized enzyme activity.
  2. Mean ± SD, n = 3. Different letters in a same column indicate a significant difference (p < 0.05) between soils.
  3. †Diversity = ΣPi (ln Pi), where Pi = the proportion of each T-RF in a single sample.
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