实验数据和元data

土壤引发效应引起的不稳定碳输入会影响土壤有机碳 （SOC） 分解，在大多数情况下，其中受氮 （N） 有效性的调节。然而，长期 N 添加s 引发效应仍不清楚因为目前的理解主要来自短期实验室孵化 N 添加的研究，尤其是在北方森林中。在这里，土壤中收集 12 年的原位氮添加13个 C 标记的葡萄糖、甘氨酸和草酸（SOC 的 2.5%）。

Labile carbon inputs driven by soil priming effects influence the decomposition of soil organic carbon (SOC), and this process is mostly regulated by nitrogen (N) availability. However, the priming effects under long-term N addition remain unclear, as current understandings are primarily derived from short-term laboratory incubation studies involving N addition, particularly in boreal forests. Herein, we added 13C-labeled glucose, glycine, and oxalic acid (accounting for 2.5% of SOC) to soils that had undergone 12 years of in situ N addition.