Table 1.
Basic situation of different vegetation types.
Table 2.
Mean (±SE, n = 3) soil basic physical and chemical properties in the five vegetation types.
Table 3.
Two-way ANOVA of the effects of different vegetation types (VT) and soil depths (SD) on SOC and LOCFs.
Fig 1.
SOC concentration (a) and stocks (b) in each soil layer of the different vegetation types.
(SOC: soil organic carbon. SH: shrub, BF: bamboo forest, CFF: Chinese fir forest, MCBF: mixed conifer–broadleaf forest, and EBF: evergreen broad-leaved forest. Uppercase letters (A, B, C and D) indicate significant differences among the different vegetation types in the same soil layer (P < 0.05); Lowercase letters (a, b and c) indicate significant differences among the same vegetation types in different soil layers (P < 0.05). Error bars represent standard error.).
Fig 2.
LOCF concentrations of the different vegetation types.
a) DOC, b) MBC, and c) EOC. (DOC: dissolved organic carbon, MBC: microbial biomass carbon and EOC: easily oxidized organic carbon. SH: shrub, BF: bamboo forest, CFF: Chinese fir forest, MCBF: mixed conifer–broadleaf forest, and EBF: evergreen broad-leaved forest. Uppercase letters (A, B, C and D) indicate significant differences among the different vegetation types in the same soil layer (P < 0.05); Lowercase letters (a, b and c) indicate significant differences among the same vegetation types in different soil layers (P < 0.05). Error bars represent standard error.).
Table 4.
The proportion of LOCFs (DOC, MBC, and EOC) in total SOC (%) of the five vegetation types.
Table 5.
LOCFs (DOC, MBC, and EOC) stocks in the different vegetation types.
Table 6.
SOC pool indexes (L, LI, CPI, and CPMI) of the different vegetation types.
Fig 3.
Redundancy analysis of soil carbon fractions and physicochemical properties.
(Correlations among soil carbon fractions, soil physicochemical properties, and principal component analysis axes are represented by the length and angle of lines. The length of the arrow indicates the relative extent explained by that variables; n = 45. SOC: soil organic carbon, DOC: dissolved organic carbon, MBC: microbial biomass carbon and EOC: easily oxidized organic carbon. TN: total nitrogen, TP: total phosphorus, BD: bulk density, and pH: soil acid-alkalinity. SH: shrub, BF: bamboo forest, CFF: Chinese fir forest, MCBF: mixed conifer–broadleaf forest, and EBF: evergreen broad-leaved forest.).