Fig. 2

Effects of nitrogen addition on δ15N value and N concentration of different components of Larix gmelinii. A The δ15N value of different components of Larix gmelinii. B The N 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