Figure 1. Total value of root length (A), root surface area (B), and root volume (C) in the fine-root diameter range of 0–0.2, 0.2–1.0 and 1.0–2.0 mm of three rice cultivars (PI and TN, allelopathic cultivars PI312777 and Taichung Native1; Le, non-allelopathic cultivar Lemont) at 3–6 leaf stages.

Significant differences (P < 0.05) between rice cultivars at the same leaf stage were indicated by different lowercases, and the significant differences for total values of 0–2.0 mm diameter were indicated by different uppercases at the end of the bars, according to Tukey’s honestly test.