Changes of bacterial necromass and their roles in humus conversion during organic wastes composting from different sources

文献类型： 外文期刊

第一作者： Chen, Wenjie

作者： Chen, Wenjie;Yang, Yan;Chang, Su;Wei, Yuquan;Wu, Zhen;Tang, Kaiyan;Chang, Yuan;Zhang, Yifan;Li, Ji;Xu, Ting;Chen, Wenjie;Liang, Xia;Wei, Yuquan;Tang, Kaiyan;Li, Ji;Xu, Ting;Liang, Xia

作者机构：

关键词： Composting; Organic wastes from different sources; Bacterial community; Microbial necromass; Humic acid; Humification

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：9.0； 五年影响因子：9.5 ）

ISSN： 0960-8524

年卷期： 2025 年 416 卷

页码：

收录情况： SCI

摘要： This study compared the changes of bacterial necromass carbon (BNC) in composting of three distinct organic wastes [sewage sludge (SW), kitchen waste (KW), and pig manure (PM)] and their relationship with bacterial communities and humus formation. Results revealed that BNC content significantly differed across treatments, with KW exhibiting the highest level at 13 mg/g, followed by PM, where BNC changed between 8 % and 444 % of microbial biomass. Humification index and degree of polymerization indicated that PM had higher humification potential. Network analysis showed that key bacterial phyla contributing to BNC included Firmicutes in KW and Proteobacteria and Gemmatimonadota in SW and PM. Structural equation modeling demonstrated that BNC promoted the formation of humic acid in KW, while core bacteria facilitated the conversion of fulvic acid to humic acid in PM. These findings underscored the crucial role of bacterial necromass in enhancing humification and highlighted the distinct humification processes in composting.

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