Skip to main content

Table 2 Soil and microbial properties between the four forest restoration stages

From: Linkage of microbial living communities and residues to soil organic carbon accumulation along a forest restoration gradient in southern China

  Forest restoration stages
  F14 F49 F70 UF
Soil layer Topsoil Subsoil Topsoil Subsoil Topsoil Subsoil Topsoil Subsoil
Soil properties
  pH 4.75 ± 0.07 A 4.78 ± 0.06a 4.43 ± 0.04 C 4.50 ± 0.03b 4.59 ± 0.03B 4.57 ± 0.01b 4.50 ± 0.04BC 4.50 ± 0.04b
  BD (g·cm− 3) 1.35 ± 0.01 A 1.47 ± 0.02a 1.11 ± 0.01 C 1.42 ± 0.00a 1.27 ± 0.03B 1.29 ± 0.02b 1.26 ± 0.01B 1.43 ± 0.01a
  Sand (%) 77.69 ± 0.35 A 70.62 ± 0.45a 24.08 ± 0.94 C 19.78 ± 0.41c 16.85 ± 0.66D 16.23 ± 1.14d 43.93 ± 0.87B 45.88 ± 0.97b
  Silt (%) 18.17 ± 0.31 A 23.85 ± 0.18c 61.82 ± 1.16B 65.38 ± 0.44a 66.88 ± 0.69 A 66.49 ± 0.87a 44.75 ± 0.71 C 43.67 ± 0.97b
  Clay (%) 4.14 ± 0.29 C 5.53 ± 0.30d 14.10 ± 0.84 A 14.84 ± 0.26b 16.27 ± 0.53 A 17.28 ± 0.55a 11.32 ± 0.72B 10.45 ± 0.24c
Soil microbial PLFAs (nmol·g− 1)
  Bacterial PLFA 6.44 ± 0.32B 4.10 ± 0.17b 3.56 ± 0.39 C 2.42 ± 0.27b 8.75 ± 0.52 A 2.98 ± 0.11b 9.24 ± 0.72 A 11.46 ± 1.07a
  Fungal PLFA 0.60 ± 0.03BC 0.49 ± 0.05b 0.42 ± 0.07 C 0.28 ± 0.06b 0.97 ± 0.04 A 0.36 ± 0.02b 0.81 ± 0.07AB 1.42 ± 0.14a
Soil amino sugar parameters (mg·kg− 1)
  GluN 316.84 ± 29.77D 116.65 ± 10.93d 415.66 ± 7.28 C 298.97 ± 12.31c 502.64 ± 10.01B 320.89 ± 3.82b 598.21 ± 5.09 A 336.84 ± 7.53a
  MurA 27.83 ± 4.17 12.83 ± 1.75b 27.95 ± 1.39 21.38 ± 1.24a 26.03 ± 2.14 20.87 ± 1.04a 27.76 ± 3.50 20.31 ± 1.64a
  GalN 92.86 ± 17.68 C 33.37 ± 3.38c 141.06 ± 4.95B 104.14 ± 5.57b 152.56 ± 1.63B 110.10 ± 2.10b 176.67 ± 3.77 A 133.24 ± 3.56a
  1. Different uppercase and lowercase letters indicate significant differences in topsoil and subsoil between the four restoration stages at the P < 0.05 level. Values are means ± SE (n = 6). Abbreviations: BD bulk density; GalN galactosamine; GluN glucosamine; MurA muramic acid