Influence of tree species on soil microbial residue accumulation and distribution among soil aggregates in subtropical plantations of China

Abstract Background Microbial residues are significant contributors to stable soil organic carbon (SOC). Soil aggregates effectively protect microbial against decomposition; thus, residue accumulation and distribution among determine long-term SOC stability. However, how tree species influence of remains largely unknown, hindering the chances develop policies for management. Here, we investigated in under four subtropical ( Cunninghamia lanceolata , Pinus massoniana Michelia macclurei Schima superba ) after 29 years afforestation. Results Accumulation 0–10 cm layer was 13.8–26.7% higher S. than that other species. A structural equation model revealed affected directly by altering fungal biomass. Additionally, significantly contribution top 20 soil. In particular, 17.2–33.4% lower large macro-aggregates (LMA) but 60.1–140.7% micro-aggregates (MA) layer, 14.3–19.0% LMA 43–52.1% MA C. M. 10–20 layer. Moreover, 44.4–47.5% These findings suggest a stability studied Conclusions Our results demonstrate persistence forest soils affecting stabilization residues.