Li Mingxing, Jiang Hui, Li Ruiding, Liu Wendong, Xie Yong, Wu Wenchan, Liu Dongyang, Wu Minghui, Qiu Zhongping
School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China; School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China.
School of Life Science and Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, PR China.
Bioresour Technol. 2025 Feb;417:131873. doi: 10.1016/j.biortech.2024.131873. Epub 2024 Nov 23.
Exogenous additives can impact organic matter transformation in composting, but their effects on nitrogen conversion and humification in straw composting require clarification. This study investigated how rice husk biochar-loaded microbial agent (RM) affects nitrogen transformation and humification during straw composting. Results showed that the addition of RM enhanced ammonia oxidation and assimilation during composting, leading to a 10.32%-22.27% increase in total nitrogen content. Furthermore, the RM treatment enriched nitrogen-converting microbes such as Longispora and Coprinopsis, enhancing synergistic relationships among microbes, facilitating the accumulation of pivotal nitrogenous humus precursors (amino acid nitrogen), and promoting humus formation. This research not only guides reducing nitrogen loss during composting and elucidating the relationship between nitrogen transformation and humification but also contributes to enhancing bioconversion efficiency of agricultural waste to explore new ways of straw waste management.
外源添加剂会影响堆肥过程中的有机质转化，但其对秸秆堆肥中氮转化和腐殖化的影响尚需明确。本研究调查了负载稻壳生物炭的微生物菌剂（RM）如何影响秸秆堆肥过程中的氮转化和腐殖化。结果表明，添加RM可增强堆肥过程中的氨氧化和同化作用，使总氮含量增加10.32% - 22.27%。此外，RM处理富集了诸如长孢菌属和鬼伞属等氮转化微生物，增强了微生物之间的协同关系，促进了关键含氮腐殖质前体（氨基酸氮）的积累，并促进了腐殖质的形成。本研究不仅为减少堆肥过程中的氮损失以及阐明氮转化与腐殖化之间的关系提供了指导，还有助于提高农业废弃物的生物转化效率，探索秸秆废弃物管理的新途径。
