Table 2 Effect of N addition on the biomass ratios of leaf/stem, root/leaf, root/stem, and root/above ground of P. tabuliformis (mean ± SE, n = 5)

2.1 ± 0.2 ab

1.8 ± 0.2 b

2.3 ± 0.3 ab

2.5 ± 0.3 a

2.2 ± 0.2 ab

1.7 ± 0.2 b

0.7 ± 0.10 a

0.8 ± 0.1 a

0.7 ± 0.1 a

0.9 ± 0.2 a

0.9 ± 0.1 a

0.8 ± 0.1 a

1.4 ± 0.2 a

1.5 ± 0.3 a

1.6 ± 0.3 a

2.0 ± 0.3 a

2.0 ± 0.3 a

1.2 ± 0.2 a

0.5 ± 0.0 a

0.5 ± 0.1 a

0.5 ± 0.1 a

0.6 ± 0.1 a

0.6 ± 0.1 a

0.5 ± 0.1 a