Table 2 Physicochemical properties of upland soils derived from different parent materials in Hunan Province, China.

From: Clay mineral composition of upland soils and its implication for pedogenesis and soil taxonomy in subtropical China

Soil properties†

SS

n = 12

QRC

n = 12

GR

n = 12

LS

n = 12

SDS

n = 12

pH (H2O)

4.7 ± 0.4 b‡

4.8 ± 0.2 b

4.8 ± 0.3 b

5.5 ± 0.5 a

4.8 ± 0.4 b

SOC, g kg−1

4.5 ± 2.5 b

4.2 ± 1.2 b

4.0 ± 1.5 b

5.1 ± 2.3 b

7.6 ± 4.6 a

Sand, g kg−1

348 ± 169 b

214 ± 138 c

458 ± 154 a

68 ± 50 d

228 ± 127 c

Silt, g kg−1

346 ± 126 ab

313 ± 107 bc

229 ± 51 c

283 ± 122 bc

412 ± 95 a

Clay, g kg−1

306 ± 93 c

474 ± 72 b

313 ± 131 c

650 ± 152 a

360 ± 95 c

Al2O3, g kg−1

158 ± 37 b

148 ± 17 b

201 ± 30 a

209 ± 54 a

139 ± 41 b

SiO2, g kg−1

661 ± 96 ab

666 ± 62 ab

604 ± 75 bc

538 ± 92 c

709 ± 81 a

K2O, g kg−1

21.8 ± 8.3 b

18.1 ± 5.2 b

32 ± 10.4 a

17 ± 6 b

17.8 ± 7.2 b

Fe2O3, g kg−1

61.4 ± 24.9 b

59 ± 11.7 b

50.8 ± 16.2 b

87 ± 28.6 a

48.2 ± 15.4 b

Fed, g kg−1

25.4 ± 6.7 b

28.5 ± 6.6 b

20 ± 9.6 b

45.6 ± 15.9 a

26.3 ± 6.9 b

CEC, cmol kg−1

10.9 ± 4.8 b

15 ± 2.2 a

13.2 ± 3.4 ab

16.8 ± 5.8 a

13.5 ± 5.2 ab

CEC/clay, cmol kg−1 clay

34 ± 9.3 a

27.6 ± 5.8 a

30.6 ± 17 a

23.3 ± 5.4 a

36 ± 10.5 a

  1. †SOC: soil organic carbon; CEC: cation exchange capacity; CEC/clay, cation exchange capacity of the clay fraction; Fed: dithionite-citrate-bicarbonate (DCB)-extractable.
  2. ‡Mean ± standard deviation. Means followed by different letters indicate the data were statistically different at P < 0.05 among different parent materials.
Back to article page