Note:
DF1 and DF2 denote the numerator
and denominator degrees of freedom, respectively. **, P< 0.001; *, P < 0.05.
Table S3 Effects of warming (W), nitrogen addition (N), year (Y) and
their interactions on plant density, plant coverage and plant height of
C3 and C4 plants group from 2013 to
2022, based on a repeated-measures analysis of variance (ANOVA).