Xu et al. (2025): Microbial-driven iron transformation and carbon stabilisation in flooded soils: roles of biochar and rock weathering
Qiao Xu, Gefeng Zhang, Feifan Zhang, Tharanga Bandara, Hongyan Guo, Meiling Xu and Caixian Tang, IN: Plant and Soil, https://doi.org/10.1007/s11104-025-08168-x
The escalating climate crisis demands innovative carbon dioxide removal strategies, with biochar and enhanced rock weathering (ERW) emerging as promising carbon-negative solutions. However, their contrasting effects on iron (Fe) (hydr)oxide–organic carbon (OC) interactions, a key mechanism underlying mineral-mediated C persistence, remain poorly understood.
A pot experiment examined the effects of biochar and enhanced basalt weathering alone and in combination on Fe oxide phases, C-binding capacity, Fe-complexed OC characteristics, and shifts in Fe-oxidising and reducing microbial communities via 16S rRNA sequencing in a paddy soil.