Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China; College of Life Sciences, University of Chinese Academy of Sciences, Beijing 101408, China.
Institute of Farming and Cultivation, Heilongjiang Academy of Agricultural Sciences, Harbin 150028, China.
Bioresour Technol. 2024 Dec;413:131545. doi: 10.1016/j.biortech.2024.131545. Epub 2024 Sep 26.
Inoculating lignocellulose-degrading microorganisms can accelerate straw decomposition in paddy field; however, the relationship between indigenous and inoculated microorganisms remains unclear. This study explored the effects of microbial inoculation on straw decomposition, microbial community, lignocellulose-degrading consortia, and associated functional genes. After inoculation, straw degradation rate increased by up to 4.9 %, and the rice yield increased by 790 kg/ha. Microbial inoculation restructured soil microbial community, influencing key taxa and interactions within the microbial network. A lignocellulose-degrading consortia consisting 37 genera was established, with a notable increase in the relative abundance of lignocellulose-degrading bacteria following inoculation. Among them, Pseudarthrobacter, with high lignin-degrading enzyme activity, emerged as a key genus after inoculation. Additionally, the abundance of lignin-degrading enzyme genes also increased significantly after inoculation. These findings offer new insights into how microbial inoculation accelerates the in situ decomposition of rice straw by reshaping the structure and function of lignocellulose-degrading consortia within the soil ecosystem.
接种木质纤维素降解微生物可以加速稻田中秸秆的分解，但土著和接种微生物之间的关系尚不清楚。本研究探讨了微生物接种对秸秆分解、微生物群落、木质纤维素降解菌群和相关功能基因的影响。接种后，秸秆降解率最高提高了 4.9%，水稻产量增加了 790 公斤/公顷。微生物接种改变了土壤微生物群落结构，影响了微生物网络中的关键分类群和相互作用。建立了一个由 37 个属组成的木质纤维素降解菌群，接种后木质纤维素降解菌的相对丰度显著增加。其中，具有高木质素降解酶活性的节杆菌属在接种后成为关键属。此外，木质素降解酶基因的丰度也显著增加。这些发现为微生物接种通过重塑土壤生态系统中木质纤维素降解菌群的结构和功能来加速水稻秸秆的原位分解提供了新的见解。
