Alterations in microbial-mediated methane, nitrogen, sulfur, and phosphorus cycling within paddy soil induced by integrated rice-fish farming
文献类型： 外文期刊
作者： Hou, Yiran 1 ; Jia, Rui 1 ; Zhou, Linjun 1 ; Zhang, Liqiang 1 ; Wei, Sun 1 ; Li, Bing 1 ; Zhu, Jian 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Integrated Rice Fish Farming Ecol, Minist Agr & Rural Affairs, Wuxi 214081, Peoples R China
2.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Peoples R China
关键词： Paddy soil; Methane/nitrogen/sulfur/phosphorus cycling; Integrated rice-fish farming; Microbiome; Metagenome
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.4； 五年影响因子：8.6 ）
ISSN： 0301-4797
年卷期： 2025 年 388 卷
页码：
收录情况： SCI
摘要： Rice paddies are crucial ecosystems, supporting dense microbial populations and playing a significant role in global food security. Integrated rice-fish farming has been recognized as an important agricultural production pattern to enhance agro-ecosystem stability and food productivity. Using metagenomic sequencing, we compared the microbial-mediated soil CH4, N, S, and P cycles in integrated rice-fish farming versus traditional rice monoculture, exploring their potential coupling mechanisms within microbes. Integrated rice-fish farming has significantly impacted these microbial-mediated cycles in paddy soil, altering the overall functional diversity, sum abundance, and microbial host diversity for the CH4, N, S, and P cycling genes. Specifically, it suppressed the denitrification, assimilatory nitrate reduction (ANR), assimilatory sulfate reduction (ASR), thiosulfate oxidation, organic phosphoester hydrolysis, and two-component system pathways and most of their associated functional genes, while enhanced the acetoclastic methanogenesis and the reduction of tetrathionate to thiosulfate processes. Compared to traditional rice monoculture, integrated rice-fish farming resulted in metagenome-assembled genomes (MAGs) with fewer and more isolated biogeochemical cycling genes, lacking potential couplings among multi-element cycles. Additionally, this farming approach increased the soil nutrient levels including the total carbon (TC), total organic carbon (TOC), total nitrogen (TN), total sulfur (TS), and total phosphorus (TP) concentrations, which have been identified as the most crucial factors driving the alterations in microbial functional genes/pathways involved in biogeochemical cycling processes in our study. Overall, integrated rice-fish farming dynamically altered the microbial-mediated CH4, N, S, and P cycles and their potential couplings within microbes through promoting the soil nutrient levels, which could favor rice growth, thus maintaining food security and providing refined knowledge for maintaining soil sustainability.
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