RM: root mass; SM: shoot mass; R/S: root: shoot ratio; MRL: main root length; MRD: main root diameter; LRL: lateral root length; LRN: lateral root number. Significance levels were: * p < 0.05, ** p < 0.01, *** p < 0.001.
†Total biomass, shoot mass, root mass and root: shoot ratio were analyzed with data across all three stages (282 individuals in total), and other traits across two stages of 50 and 70 d (199 individuals).
Table 2. F values for one-way ANOVAs on log-transformed total biomass (TM) and ANCOVAs on log-transformed root traits, with population density (PD) as effect in two soil conditions at 30, 50 and 70 d of growth, and log10(TM) nested within growth stage as a covariate in ANCOVAs.