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Effects of a Vegetable Eel Co-Culture System on the Soil Ammonia-Oxidizing Microbial Community

文献类型： 外文期刊

作者： Fan, Haidan 1 ; Bai, Naling 1 ; Lv, Weiguang 1 ; Chu, Xiangqian 1 ; Zheng, Xianqing 1 ; Li, Shuangxi 1 ; Zhang, Juanqin 1 ; Zhang, Haiyun 1 ; Zhang, Hanlin 1 ;

作者机构： 1.Shanghai Acad Agr Sci, Ecoenvironm Protect Inst, Shanghai 201403, Peoples R China

2.Shanghai Key Lab Hort Technol, Shanghai 201403, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Low Carbon Green Agr Southeastern China, Shanghai 201403, Peoples R China

4.Shanghai Agr Acad Sci, Key Lab Integrated Rice Fish Farming Ecosyst, Minist Agr & Rural Affairs, Shanghai 201403, Peoples R China

关键词： vegetable eel co-culture system; nitrification; soil nitrification potential rate; comammox Nitrospira; ammonia-oxidizing bacteria; ammonia-oxidizing archaea

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2024 年 14 卷 12 期

页码：

收录情况： SCI

摘要： (1) Background: A vegetable eel co-culture system is an economically efficient way of agricultural cultivation, which can have an impact on the soil microbial environment and play a pivotal role in the soil nutrient cycle, but there is little research on its impact on soil ammonia-oxidizing microorganisms. (2) Methods: NovaSeq platform sequencing was employed to investigate the richness, structure, and diversity of soil ammonia-oxidizing microbial communities, exploring the effects of a vegetable eel co-culture system on soil nitrogen cycling. Four different planting treatments were set up: unfertilized without vegetable eel (CCK), fertilized without vegetable eel (CRT), unfertilized with vegetable eel (ICK), and fertilized with vegetable eel (IRT). (3) Results: A vegetable eel co-culture system significantly increased soil pH and decreased bulk density under fertilization conditions. The soil nitrification potential rate was enhanced by a vegetable eel co-culture system to an average of 26.3%. A vegetable eel co-culture system significantly altered the community structure of all ammonia-oxidizing microorganisms, with a significant increase in the richness and diversity of ammonia-oxidizing bacteria (AOB) and comammox clade-A, while fertilization significantly increased the diversity of all ammonia-oxidizing microbial communities. Structural equation modeling (SEM) analysis showed that the main environmental factors affecting the structure of the ammonia-oxidizing microbial community were nitrate and total nitrogen. The number of amoA genes in AOB and comammox clade-B was significantly positively correlated with the soil potential N nitrification rate (PNR), which played a leading role in the nitrification of alkaline vegetable soil. The network analysis revealed that a vegetable eel co-culture system improved the modularity of AOB and comammox clade-B by 13.14% and 5.66%. (4) Conclusions: This study showed that the vegetable eel co-culture system stimulated the evolution of ammonia-oxidizing microbial communities by changing the physicochemical properties, which in turn promoted the soil nitrification reaction.

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