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Table 1 Bulk soil and rhizosphere soil properties (mean ± standard error) of the three types of Robinia pseudoacacia stands following forest conversion from seedling to coppice stands

From: Impact of Robinia pseudoacacia stand conversion on soil properties and bacterial community composition in Mount Tai, China

  Rhizosphere Bulk soil
FR SR TR FNR SNR TNR
N (%) 0.38 ± 0.03a 0.32 ± 0.01b 0.33 ± 0.01b 0.43 ± 0.02a 0.32 ± 0.01c 0.36 ± 0.02b
C (%) 3.80 ± 0.27a 3.31 ± 0.14b 3.50 ± 0.15b 4.56 ± 0.16a 3.33 ± 0.16c 3.77 ± 0.30b
P (%) 1.58 ± 0.13b 1.88 ± 0.05a 1.63 ± 0.08b 1.66 ± 0.05a 0.93 ± 0.03b 0.85 ± 0.02c
C/N 10.14 ± 0.18b 10.22 ± 0.31b 10.57 ± 0.22a 10.52 ± 0.26a 10.35 ± 0.47a 10.51 ± 0.17a
C/P 2.31 ± 0.30a 1.76 ± 0.11c 2.15 ± 0.18b 2.75 ± 0.10c 3.59 ± 0.24b 4.43 ± 0.28a
N/P 0.24 ± 0.03a 0.17 ± 0.01c 0.20 ± 0.01b 0.26 ± 0.01c 0.35 ± 0.03b 0.42 ± 0.02a
NO3-N (mg·kg− 1) 69.06 ± 1.53a 63.29 ± 1.63b 59.50 ± 1.84c 67.20 ± 2.99a 60.52 ± 1.39b 60.71 ± 2.14b
NH4+-N (mg·kg− 1) 58.60 ± 1.24a 58.81 ± 1.62a 55.20 ± 2.42b 45.99 ± 4.02b 54.25 ± 0.43a 39.41 ± 1.48c
A.N (mg·kg− 1) 127.66 ± 2.27a 122.10 ± 2.95a 114.70 ± 4.10b 113.19 ± 4.19a 114.77 ± 1.36b 100.12 ± 2.87c
A.P (mg·kg− 1) 16.93 ± 1.26a 11.18 ± 0.9b 8.35 ± 0.98c 14.41 ± 0.91a 14.24 ± 1.08a 9.60 ± 1.27b
SOM (g·kg− 1) 64.91 ± 0.92a 62.84 ± 1.29b 50.73 ± 1.05c 61.93 ± 1.78a 51.69 ± 0.58b 46.70 ± 1.47c
Exchangeable Ca (cmol·kg− 1) 48.74 ± 9.48b 44.63 ± 11.21b 65.83 ± 12.46a 61.78 ± 13.15a 51.01 ± 7.96a 65.26 ± 11.27a
Exchangeable Mg (cmol·kg− 1) 12.09 ± 1.60b 12.01 ± 1.17ab 13.17 ± 0.75a 11.68 ± 0.93a 12.66 ± 0.78a 13.07 ± 0.74a
Exchangeable K (cmol·kg− 1) 0.71 ± 0.05ab 0.70 ± 0.03b 0.76 ± 0.05a 0.72 ± 0.05a 0.86 ± 0.28a 0.72 ± 0.07a
Soil moisture (%)     7.66 ± 0.61b 13.28 ± 0.52a 13.95 ± 0.60a
Soil quality index 29.14 ± 0.36a 27.42 ± 0.33b 26.72 ± 0.64b 27.59 ± 0.29a 26.14 ± 0.29b 24.33 ± 0.97b
  1. Mean values ±SE (n = 5) are shown. FR, SR and TR represent the rhizosphere of seedling plantations, first generation coppice plantations and second generation coppice plantations, respectively; FNR, SNR and TNR represent bulk soil of seedling plantations, first generation coppice stands and second generation coppice stands, respectively. N nitrogen, C carbon, P phosphorus, C/N carbon and nitrogen ratio, C/P carbon and phosphorus ratios, N/P nitrogen and phosphorus ratios, NO3-N nitrate nitrogen, NH4+-N ammonium nitrogen, A. N available nitrogen, A. P available phosphorus, SOM soil organic carbon. Different lowercase letters indicate significant differences in soil properties among the bulk soil or rhizosphere in different R. pseudoacacia plantations (p < 0.05)