2.4. Statistical analysis
Significant differences among treatments were analyzed by the two-factor
variance of analysis (ANOVA) with Duncan test (p<0.05) to
evaluate the effect of soil gravel content, plant species and their
interaction on plant traits during vegetation restoration. Pearson’s
correlation analysis was used to examine the relationships between plant
traits and soil properties. Redundancy analysis (RDA) was conducted to
analyze the relationships between plant trait indices, the content of C,
N, and P and their stoichiometric characteristics and soil properties
under different plant species treatments. All data analyses were
performed using SPSS 20.0 and Canoco 4.5.