Fig. 3
Biomass production of the shoot and roots (a) and shoot chlorophyll contents (b, c) of Lolium perenne after 1 month of growth in the contaminated soil non amended (CT) or amended with 2% (w/w) of biochar (BC), AMOchar made using molasses (BCM) or AMOchar made using sucrose (BCS). Letters indicate significant differences between treatments (p < 0.05) (n = 3–4). Effect sizes: Shoot dry mass = 0.353; Root dry mass = 0.181; Chl a = 0.173; Chl b = 0.23. Confidence intervals: Shoot dry mass = 0.163–0.902; Root dry mass = 0.0937–0.886; Ch a = 0.159–0.93; Chl b = 0.166–0.913.
