Fig. 6
From: Testing allometric scaling relationships in plant roots
SMA results of the relationship between plant fine root productivity (P) and biomass (M) for roots with different diameters. Values are log-transformed (base 10). The lines show fitted regression equations for fine roots of < 1 mm in diameter: log10P = 0.123 + 0.91 × log10M (95% C.I. for slope is 0.80 to 1.04, r2 = 0.54, n = 109); fine roots of 1–2 mm in diameter: log10P = − 0.227 + 1.01 × log10M (95% C.I. for slope is 0.90 to 1.13, r2 = 0.75, n = 81); coarse roots of > 2 mm in diameter: log10P = − 0.178 + 0.88 × log10M (95% C.I. for slope is 0.78 to 0.99, r2 = 0.36, n = 190). The short dash lines refer to the 95% confidence intervals. The pink line refers to the 1:1 line