木霉菌对土壤团聚体有机碳矿化的影响

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中图分类号：S154.39 文献标志码：A 文章编号：1004-390X（2025）06-0168-11

Abstract： [Propose] To investigate the effect of Trichoderma on the mineralization of soil aggregate organic carbon， providing scientific evidence for carbon transformation in different particle sizes of aggregates. [Methods] An indoor constant temperature incubation experiment with or without Trichoderma treatment was conducted. Changes of the mineralization process of organic carbon and microbial community structure in bulk soil （BS）， large macro-aggregates （LM）， macro-aggregates （MA）， and micro-aggregates （MI） were determined. [Results] The application of Trichoderma had a significant impact on the mineralization of organic carbon and microbial abundance in dierent particle sizes of aggregates. After Trichoderma addition， organic carbon in MA showed a positive priming effect， with an accumulated mineralizable organic carbon of 1587.67mg/kg ; while a negative priming effect was observed in MI，and Trichoderma promoted the turnover of organic carbon in MI， with an accumulated mineralizable organic carbon of 1778.33mg/kg . Theaddition of Trichoderma could increase the relative abundance of Proteobacteria， which reduced the positive priming effect of organic carbon to some extent. The application of Trichoderma mainly changed the relative abundance of soil Ascomycota and Basidiomycota， thereby affecting the stability of organic carbon. [ Conclusion] Trichoderma can enhance carbon retention in micro-aggregates and affect the relative abundance of Proteobacteria， Ascomycota and Basidiomycota in the soil.

Keywords： Trichoderma; organic carbon mineralization; soil aggregates; priming effect

土壤碳库在全球碳循环中具有重要作用，土壤有机碳矿化是土壤中重要的生物化学过程，直接影响土壤养分释放、温室气体排放和土壤结构稳定性[1-2]。（剩余15611字）