Plant litter addition promotes short-term improvement of saline-alkali soils through labile carbon and enzyme activities - Lirong Zhao; Yuyang Kou; Mengqi Zhang; Ni Gao; Ermao Ding; Shichen Wang; Kaiyang Han; Yixuan Liu; Minmin Qiang; Huan Ma; Liping Hu; Jun Meng; et al. (Journal of Soils and Sediments, 2026)