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. 2024 Jul 15;15:1419645. doi: 10.3389/fmicb.2024.1419645

Table 3.

Comparison of soil physicochemical properties among three different plantations (mean ± SD, n = 3).

Stand type Soil layer pH SOC
(g‧kg−1)		 DOC
(mg‧kg−1)		 TN
(g‧kg−1)		 TP
(g‧kg−1)		 NO3−-N
(mg‧kg−1)		 NH4+-N
(mg‧kg−1)		 AP
(mg‧kg−1)		 C/N
PM 0–20 cm 4.56 ± 0.11aA 26.87 ± 2.32aA 17.67 ± 3.69aA 1.18 ± 0.18aA 0.40 ± 0.04aA 0.48 ± 0.25aA 22.42 ± 4.96aA 1.04 ± 0.03aA 22.99 ± 3.16aA
20–40 cm 4.59 ± 0.20aA 21.14 ± 0.83aB 16.90 ± 0.07aA 1.31 ± 0.11aA 0.30 ± 0.02aB 0.42 ± 0.1aA 20.64 ± 1.61aA 0.73 ± 0.02aB 16.63 ± 2.05aB
40–60 cm 4.57 ± 0.11aA 16.07 ± 2.39aC 15.47 ± 3.29aA 1.04 ± 0.15bA 0.37 ± 0.02aA 0.35 ± 0.37bA 16.71 ± 0.47aA 0.50 ± 0.02aC 15.76 ± 3.55aB
EF 0–20 cm 4.43 ± 0.08aA 23.04 ± 2.87aA 22.51 ± 11.12aA 1.22 ± 0.22aA 0.28 ± 0.02bA 1.56 ± 1.46aA 18.30 ± 3.90aA 0.76 ± 0.24aA 19.17 ± 3.81aA
20–40 cm 4.42 ± 0.21aA 18.07 ± 3.02aAB 15.69 ± 3.26aA 1.06 ± 0.11aA 0.23 ± 0.03bA 0.64 ± 0.65aA 16.05 ± 2.04aA 0.50 ± 0.12aA 16.99 ± 2.26aA
40–60 cm 4.48 ± 0.15aA 14.87 ± 3.35aB 10.79 ± 2.31aA 1.10 ± 0.22abA 0.28 ± 0.04bA 0.52 ± .47abA 17.47 ± 6.30aA 0.47 ± 0.16aA 14.31 ± 6.45aA
PM/EF 0–20 cm 4.50 ± 0.06aA 27.38 ± 4.12aA 21.30 ± 4.51aA 1.30 ± 0.17aA 0.33 ± 0.03bA 1.33 ± 1.03aA 24.03 ± 3.82aA 0.90 ± 0.20aA 21.36 ± 4.58aA
20–40 cm 4.56 ± 0.06aA 21.97 ± 5.70aAB 17.17 ± 5.00aA 1.22 ± 0.20aA 0.36 ± 0.03aA 0.71 ± 0.52aA 21.64 ± 3.26aA 1.03 ± 1.00aA 18.89 ± 7.67aA
40–60 cm 4.52 ± 0.05aA 17.13 ± 2.95aB 13.56 ± 6.45aA 1.43 ± 0.16aA 0.37 ± 0.05aA 1.20 ± 0.03aA 21.19 ± 5.09aA 0.71 ± 0.33aA 12.20 ± 3.43aA
Two-way ANOVA Stand ns ns ns * *** ns ns ns ns
Layer ns *** * ns * ns ns ns *
Stand×Layer ns ns ns ns * ns ns ns ns

PM, Pinus massoniana; EF, Erythrophleum fordii; SOC, Soil organic carbon; DOC, Dissolved organic carbon; TN, Total nitrogen; TP, Total phosphorus; NO3−-N, Nitrate nitrogen; NH4+-N, Ammonium nitrogen; and AP, Available phosphorus. Different lowercase letters indicate significant differences among different stand types for the same soil layer, whereas different uppercase letters denote significant differences among different soil layers for the same stand type at the 0.05 significance level.*p < 0.05; ***p < 0.001; and ns p > 0.05.