数字农科院2.0

Bamboo-sourced microbial fertilizers impact soil carbon cycling: Metagenomic insights from Moso bamboo plantations

文献类型： 外文期刊

作者： Qiaoling Li;Zhiyuan Huang;Fangyuan Bian;Zheke Zhong;Xiaoping Zhang

作者机构：

关键词： C cycle gene;Microbial community composition;Microbial fertilizer;Phyllostachys edulis;Soil organic C fractions

期刊名称： Environmental Technology and Innovation

ISSN： 2352-1864

年卷期： 2025 年 40 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Effective management of soil organic carbon (SOC) in bamboo forest provides a potential opportunity to address climate change. However, the microbial mechanisms by which bamboo-sourced microbial fertilizer (BSMF) regulate C cycling gene to alleviate C decline remain unclear. In this study, we employed metagenomics to assess microbial C cycling in Moso bamboo plantations subjected to no fertilizer (CK) and three BSMFs: Bacillus subtilis ACP81 (ACP81), Terribacillus goriness CS3 (CS3), and ACP81 +CS3 (A+C). Results showed that, compared to CK, A+C significantly increased the contents of SOC, highly labile organic carbon (HLOC), moderately labile organic carbon (MLOC), and mineral-associated organic carbon (MAOC), whereas ACP81 and CS3 resulted in opposite trends (P < 0.05). Moreover, Chloroflexi, Mucoromycota, Bifiguratus, and Acidothermus were represented in A+C; Firmicutes and Metarhizium in ACP81; Dactylella in CS3; and Clavulinopsis in CK. Metagenomic analysis revealed that the CS3 significantly enriched the abundance of genes uidA, rfbB, katG, bgaA, glcD, and mttB, whereas A+C enhanced the genes coxM and MAN, and FUCA was abundant in ACP81 (P < 0.05). RDA and Mantel analysis revealed soil C fractions were shaped by available nitrogen (AN) and potassium (AK), microbial communities, and C cycle genes, with AK was the most crucial factor for C fractions identified by random forest model. The partial least–squares path model indicated that soil AK and C cycle genes directly affect the C fractions. These findings provide novel insights into the linkages between BSMF and C cycling, suggesting a management practice to enhance soil C sequestration in bamboo plantations.

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