Fig. 1

Leaf N content (A), root dry weight (B), stem dry weight (C), leaf dry weight (D) and root/shoot dry weight ratio (E) of tea trees in relation to nitrogen (N) supply (0, 50, 100, 300, 1200 and 6000 μmol L⁻¹). The data were examined using the least significant difference (LSD) test. Each point is mean ± standard error (n = 5). Different letters above or below standard error bars indicate significant difference at P < 0.05