Table 4. Forest floor and soil nutrition concentration (mean±SE) in different forest types.

Carbon (C) (g kg–1)

Nitrogen (N) (g kg–1)

Phosphorus (P) (g kg–1)

Carbon/Nitrogen ratio (C/N ratio)

Ⅰ

Ⅱ

Ⅲ

Ⅰ

Ⅱ

Ⅲ

Ⅰ

Ⅱ

Ⅲ

Ⅰ

Ⅱ

Ⅲ

Forest floor

L-horizon

509.05±3.78a

454.25±1.12b

445.58±5.50b

9.05±0.14c

14.23±0.96a

12.00±0.23b

2.16±0.11b

2.95±0.12a

2.54±0.13ab

56.28±0.83a

32.35±2.06c

37.15±0.43b

FH-horizons

354.70±12.92a

380.52±12.03a

354.08±7.10a

12.50±0.27b

15.20±0.67a

12.75±0.45b

1.56±0.05a

1.25±0.05b

1.33±0.03b

28.36±0.68a

25.10±0.75b

27.85±0.86a

Mineral soil

0–10cm

31.23±1.01b

48.33±1.94a

50.80±3.87a

2.23±0.03b

3.53±0.20a

3.70±0.21a

0.56±0.04b

0.75±0.08a

0.89±0.04a

13.99±0.46a

13.73±0.58a

13.71±0.57a

10–20cm

10.57±0.75b

19.83±0.64a

20.5±2.14a

0.93±0.03b

1.63±0.07a

1.53±0.17a

0.36±0.02b

0.52±0.02a

0.41±0.02b

11.30±0.49b

12.16±0.29b

13.36±0.10a

Data marked with different letters within the same row at each individual nutrition parameter represent significant difference among different forest types at the 0.05 level (Duncan test). Ⅰ: Pinus tabuliformis forest, Ⅱ: coniferous-broadleaved P. tabuliformis mixed forest, Ⅲ: Quercus mongolica forest L-horizon: litter horizons; FH-horizons: fermentation and humus horizons