Fig. 3

Effects of nitrogen addition on δ13C value and C concentration of different components of Larix gmelinii. A The δ13C value of different components of Larix gmelinii. B The C concentration of different components of Larix gmelinii. Error bars represent 1 SE of the mean. CK, LN, MN, HN represent the control, low N treatment, medium N treatment, and high N treatment, respectively