3.3 Density effects on the allometric relationships between shoot and root biomass
The density effects on the allometric relationships were inconsistent across the six species (Table 1; Figure 5). Among them, the scaling exponents of S. viridis , C. squarrosa and L. chinensis did not differ significantly among the five planting densities (Figure 5b-d). Density had a significant effect on the scaling exponents of C. glaucum and S. grandis , but the scaling exponents fluctuated with increasing density (Figure 5a, f). In M. sativa , the scaling exponents gradually decreased with increasing density (Figure 5e).