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土壤圈（英文版）
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2026年4期
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Modulation of sulfur-cycling microbial community and functional gene network by vermicompost amendment in saline-alkali soils
Modulation of sulfur-cycling microbial community and functional gene network by vermicompost amendment in saline-alkali soils
摘要
Soil microorganisms drive sulfur(S)biogeochemical cycle,a critical process supporting plant growth and soil fertility.In saline-alkali soils,microbial survival is challenged by harsh conditions,requiring adaptations such as antioxidant enzyme production.Soil amendments,particularly vermicompost,may enhance microbial resilience.This study used metagenomic techniques to investigate the effects of saline-alkali stress on the structure and functional roles of soil S-cycling microbial communities.Three treatments were analyzed:saline-alkali soil(SA),non-saline soil(control,CK),and vermicompost-amended saline-alkali soil(SV).Significant differences were observed in S-cycling microbial communities between SA and CK.In SA,the relative abundance of S reduction functional genes significantly increased by 67.7％compared to CK(P＜0.05).Conversely,SV reduced these genes by 42％relative to SA(P＜0.05),aligning their abundance with CK.Furthermore,genes involved in assimilatory sulfate reduction were significantly upregulated in SV compared to both SA and CK(P＜0.05),showing a 10％increase over SA(P＜0.05).These findings demonstrate that vermicompost modulates S-cycling functional gene expression,suppressing dissimilatory sulfur reduction while enhancing sulfate assimilation,thereby improving S bioavailability.This study provides microbiological evidence for vermicompost-driven restoration of the S cycle in saline-alkali soils,offering a sustainable strategy for ecological rehabilitation and soil management.
年，卷(期)：
2026, 36(4)
机标分类号：
S
TP391
TP273
在线出版日期：
2026年9月9日
