Effects of three coniferous plantation species on plant‐soil feedbacks and soil physical and chemical properties in semi‐arid mountain ecosystems

Table 3 Characteristics of the various soil particle-size distribution (PSD) in the three soil profiles layers of different forest types

Tree species	Soil depth	Clay (%)	Silt (%)		Sand (%)
Tree species	Soil depth	< 2 µm	2.00–20.00 µm	20.00–50.00 µm	50.00–100.00 µm	100.00–250.00 µm	250.00–500.00 µm	500–2000 µm
Larix principis-rupprechtii	0–10 cm	8.66 ± 0.38a	48.75 ± 0.71a	27.21 ± 0.35a	9.24 ± 0.51b	4.46 ± 0.53b	3.38 ± 0.45b	0.18 ± 0.09c
	10–20 cm	8.13 ± 0.35a	43.67 ± 0.96a	25.70 ± 0.26b	10.06 ± 0.10b	6.65 ± 0.44b	6.41 ± 0.46a	1.86 ± 0.22b
	20–30 cm	5.96 ± 0.50b	31.92 ± 4.49b	22.99 ± 0.34c	13.90 ± 1.21a	10.65 ± 1.44a	7.10 ± 0.46a	3.06 ± 0.55a
Picea crassifolia	0–10 cm	9.23 ± 0.17a	51.35 ± 0.79a	29.63 ± 0.49a	8.61 ± 0.41b	1.40 ± 0.23b	3.79 ± 0.63c	–
	10–20 cm	8.03 ± 0.32a	46.45 ± 2.23a	26.93 ± 0.56a	8.43 ± 0.34b	3.70 ± 1.11ab	6.51 ± 0.38b	–
	20–30 cm	6.31 ± 0.58b	32.72 ± 3.49b	18.23 ± 3.84b	11.75 ± 0.61a	5.83 ± 0.77a	10.30 ± 0.74a	–
Pinus tabuliformis	0–10 cm	8.88 ± 0.29a	47.07 ± 0.45c	18.62 ± 2.00b	8.37 ± 0.96a	1.03 ± 0.32a	20.63 ± 1.41a	–
	10–20 cm	7.78 ± 0.64ab	53.15 ± 1.07b	24.99 ± 0.42a	5.95 ± 0.58b	2.11 ± 0.26b	5.89 ± 0.89b	–
	20–30 cm	6.46 ± 0.54b	59.03 ± 1.82a	27.66 ± 1.68a	4.12 ± 0.63b	7.37 ± 2.31c	3.02 ± 0.59b	–

The different lowercase letters refer to significant differences among different soil layers in the same plantation stands (P < 0.05)
– indicates no data