Note: SRL: specific root length; RTD: root tissue density;
Significant difference *, P ≤ 0.05; **, P ≤ 0.01; ***, P ≤ 0.001; NS,
not significant.
Table 4. Variance contribution rate (VCR) of the effects of nitrogen
addition (N), phosphorus addition (P), water addition (W) and their
interactions (N×P, N×W and P×W), and cluster fragmentation (C) on six
root traits for Stipa breviflora .