Microbial mechanisms driving soil CO2 emissions under long-term straw mulching and N fertilization in a wheat–maize rotation system - Pengfei Li; Yikai Zhao; Afeng Zhang; Hangyu Xiao; Zihan Shan; Yan Wang; Jialu Gong; Qaiser Hussain; Jianbin Zhou; Zhujun Chen; Xudong Wang (Applied Soil Ecology, 2026)