FIGURE
4 Principal component analysis of soil properties.
FIGURE 5 Pearson correlation coefficients among the soil
properties, plant biomass, and organic carbon and TN stocks. Red
represents positive correlations and
blue represents negative correlations. Significance differences are as
follows: *** P < 0.001, ** P < 0.01, * P <
0.05. SD, sol bulk density; SOC, soil organic carbon; DOC, dissolved
organic carbon; LOC, labile organic carbon; TN, soil total nitrogen; TP,
total phosphorus; C/N, SOC to TN ratio; C:P, SOC to TP ratio; N:P, TN to
TP ratio; AGB, aboveground biomass; RB, root biomass; R/S, root to shoot
ratio; SOCs, soil organic carbon stocks; STNs, soil total nitrogen
stocks; EOCs, ecosystem organic carbon stocks; ENs, ecosystem total
nitrogen stocks.
TABLE 2 Ecosystem organic carbon and nitrogen stocks and
proportion of soil and biomass (%).