Microbial carbon use efficiency and necromass turnover drive persistent carbon formation in paddy soils under straw-returned complex rotation - Yinhang Xia; Jun Chen; Donghai Jiang; Jiao Lin; Yan Xiao; Yongxue Yan; Tingsen Mou; Yeqin Shu; Nader Saad Elsayed; Yumei Chen; Georg Guggenberger; Zhenhua Zhang (Soil and Tillage Research, 2026)