Canopy vs. soil nitrogen addition differentially modulates rhizosphere microbe-metabolite coupling in Populus euphratica under drought stress
Nitrogen (N) deposition and water availability profoundly influence arid ecosystem functions; however, how different N input methods (canopy vs. soil) to shape plant–microbe–metabolite interactions remains poorly understood under drought. Integrating metagenomic and root metabolomic approaches, we conducted a pot exp...