Spiramycin fermentation residue-derived biochar regulates soil nutrient cycling, microbial communities, and antibiotic resistance gene dynamics - Yepeng Tian; Jinzhi Sun; Quancheng Shu; Hongwei Sun; Xiaoyong Yang; Yucan Liu; Yanxiang Zhang; Jing Ding; Lijuan Lan; Picheng Gong; Gang Wang (Bioresource Technology, 2026)