Microbial activity mediates the contrasting effects of biochar combined with nitrogen or phosphorus on soil respiration and easily oxidizable organic carbon across soil depths in Cunninghamia lanceolata plantations.
Biochar can alter soil organic carbon (SOC) dynamics by changing nutrient availability and microbial activity, but whether its effects differ when combined with nitrogen or phosphorus and how these responses vary over time and soil depth remain unclear. We conducted a field experiment in Cunninghamia lanceolata plantat...