Combined use of AMF and chitosan improves soybean yield and soil quality in cold regions by restructuring rhizobacterial communities and network stability - Zhuang Chen; Xiangyu Zhang; Xianyou Xiong; Yuxuan Zhao; Ruotong Wu; Lijun Liu; Tao Liu; Fuqiang Song; Xiaofeng Wang; Yuqiang Wen (Rhizosphere, 2026)