Long-term nitrogen deposition weakens the CH4 sink capacity, but enhances the CO2 and N2O source potential of the alpine grassland soil - Hang Shi; Xiaoqing Cui; Shikui Dong; Zilong Liu; Ran Zhang; Ke Zhang; Xueqi Li; Yuhao Zhang; Hui Zuo; Fengcai He; Xianqi Zhou; Mingjie Ran; et al. (Agriculture, Ecosystems & Environment, 2026)