Fig. 2
Comparison of soil physicochemical properties under different land-use types. Mean ± SD were presented in the figures. A, Moisture content; B, pH; C, Organic carbon content (SOC); D, Organic matter content (SOM); E, Total nitrogen content (TN); F, Total phosphorus content (TP); G, Total potassium content (TK); H, Alkeline-N content (AN); I, Available phosphorus content (AP); J, Available potassium content (AK). Different lowercase letters indicated significant differences among treatments (P < 0.05). C15, 0–15 cm soil depth in the cropland. C30, 15–30 cm soil depth in the cropland. F15, 0–15 cm soil depth in the plantation. F30, 15–30 cm soil depth in the plantation. G15, 0–15 cm soil depth in the grassland. G30, 15–30 cm soil depth in the grassland. T, land-use types. S, soil depth. T×S, land-use types×soil depth.
