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Milk vetch (Astragalus sinicus L.) affects microbial-driven rice straw decomposition in multiple stages

文献类型： 外文期刊

作者： Ma, Xinling 1 ; Dai, Qingjun 3 ; Qin, Wenjing 4 ; Liu, Jia 4 ; Liu, Xiaoli 1 ; Chen, Ling 1 ; Fan, Jianbo 1 ; Wu, Meng 1 ; Li, Daming 5 ; Liu, Ming 1 ;

作者机构： 1.Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, East Beijing Rd 71, Nanjing 210008, Peoples R China

2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

3.Minist Agr & Rural Affairs, Cultivate Land Qual Monitoring & Protect Ctr, Beijing 100125, Peoples R China

4.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Natl Engn & Technol Res Ctr Red Soil Improvement, Nanchang 330200, Peoples R China

5.Jiangxi Inst Red Soil & Germplasm Resource, Nanchang 330029, Peoples R China

关键词： Residue co-decomposition; Lignocellulose; Microbial community; Niche breadth

期刊名称：PLANT AND SOIL （ 影响因子：4.1； 五年影响因子：4.7 ）

ISSN： 0032-079X

年卷期： 2025 年 512 卷 1-2 期

页码：

收录情况： SCI

摘要： Background and aimsAlthough variations in microbial communities and residue components have been detected during the decomposition of monospecific and mixed plant residue in soils, little is known about the response of specific taxa to different residue types and their interactions with other microorganisms.MethodsWe compared the decomposition dynamics, recruited microbial community, and lignocellulolytic genes during the decomposition of leguminous milk vetch (MV), non-leguminous rice straw (S), and their mixed residue (SMV) to reveal the mechanisms of microbial-driven residue decomposition in soil.ResultsThe residue remaining weight and main lignocellulose component contents exhibited varied periodic dynamics during decomposition. The SMV treatment maintained a relatively high decomposition rate, particularly at the early stages. Actinobacteria, Alphaproteobacteria, Gammaproteobacteria, and Sordariomycetes were enriched in S treatment. Eurotiomycetes and Bacilli were enriched in MV treatment, while Mucoromycetes was enriched in SMV treatment. Co-decomposition of residues increased the alpha diversity of the microbial community and enriched the Mucorales by increasing its niche breadth. Redundancy analysis (RDA) revealed that Mucorales was a key functional taxon with high lignocellulolytic potential.ConclusionOur study indicated that co-decomposition could widen the niche breadth of specific microbial species facing competitive condition during decomposition. Also, they could recruit more functional groups, maintain decomposition efficiency, and promote residue decomposition.

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