Fig. 2

Soil CH₄ emission rates of different N addition treatments (control, 0 kg N·ha^− 1·year^− 1; N30, 30 kg N·ha^− 1·year^− 1; N60, 60 kg N·ha^− 1·year^− 1; N90, 90 kg N·ha^− 1·year^− 1) in plots under conventional management (CM, a) or intensive management (IM, b) and annual soil CH₄ emissions (c) from a Moso bamboo plantation (mean ± standard deviation, n = 3). Lowercase letters indicate differences in soil CH₄ emissions under different N addition treatments under CM (P < 0.05). Uppercase letters indicate differences in soil CH₄ emissions under different N addition treatments under IM (P < 0.05)