Xu Yaowen, Jiao Jiejie
Zhejiang Academy of Forestry, Hangzhou, China.
Zhejiang Hangzhou Urban Ecosystem Research Station, Hangzhou, China.
Front Microbiol. 2025 Jun 3;16:1580720. doi: 10.3389/fmicb.2025.1580720. eCollection 2025.
In subtropical areas, broadleaf forests are being increasingly converted into Moso bamboo () forests. However, few studies have systematically compared soil organic carbon (SOC) between broadleaf and Moso bamboo forests. Therefore, we investigated SOC content and relative contributions of microbial and plant residues to SOC in broadleaf and Moso bamboo forests using biomarkers. The results show that the SOC content in Moso bamboo forest soil was 12.58% lower than that in adjacent broadleaf forest. Moreover, Moso bamboo forest soils also have less microbial-derived C but more plant-derived C compared with that in the broadleaf forest soil. The changes of microbial- and plant-derived C were mainly affected by soil properties. In particular, soil pH, ligninase/cellulase ratio, and mineral properties were the main factors regulating microbial-derived C, whereas mineral properties primarily controlled plant-derived C. Overall, our study reveals differences in C sequestration pathways between broadleaf and Moso bamboo forests, highlighting the potential to increase C storage through appropriate soil management, which provides a valuable reference for mitigating climate change.
在亚热带地区，阔叶林正日益被改造成毛竹林。然而，很少有研究系统地比较阔叶林和毛竹林之间的土壤有机碳（SOC）。因此，我们使用生物标志物研究了阔叶林和毛竹林中SOC含量以及微生物和植物残体对SOC的相对贡献。结果表明，毛竹林土壤中的SOC含量比相邻阔叶林低12.58%。此外，与阔叶林土壤相比，毛竹林土壤中微生物衍生的碳较少，但植物衍生的碳较多。微生物和植物衍生碳的变化主要受土壤性质影响。特别是，土壤pH值、木质素酶/纤维素酶比率和矿物质性质是调节微生物衍生碳的主要因素，而矿物质性质主要控制植物衍生碳。总体而言，我们的研究揭示了阔叶林和毛竹林之间碳固存途径的差异，强调了通过适当的土壤管理增加碳储存的潜力，这为缓解气候变化提供了有价值的参考。
