Soil N dynamics in mixed and larch forests in northeastern China

We developed a multiple-indicator approach to evaluate differences in soil N availability across sites and between larch monoculture and mixed stands paired at three sites (Daxinganling, Maoershan, and Qingyuan) in northeastern China. The selected indicators were foliar %N, soil C/N, soil inorganic N, foliar δ15N, and δ15N of bulk soil, ammonium, and nitrate in the soil profiles., ,本研究构建了多指标方法，用以评估中国东北3个配对样地（大兴安岭、帽儿山、清原）内，不同样点间以及落叶松纯林与混交林之间的土壤氮有效性差异。所选评估指标包括叶片全氮百分比、土壤碳氮比、土壤无机氮、叶片氮稳定同位素δ15N，以及土壤剖面中全土、铵态氮与硝态氮的δ15N值。