Soils are rich in organics, particularly those that support the growth of plants. These organics are possible sources of sustainable energy, and a microbial fuel cell (MFC) system can potentially be used for this purpose. In this, the soil organic content expelled from plant root was possibly converted into electrical energy through the microbial metabolic process. The integration of MFC systems with living plant root system is a novel approach, which will facilitate sustainable resource for energy production. Therefore, the objective of this study is to electrochemically evaluate the paddy field MFCs (PF-MFCs) performance and methane emission under organic and conventional fertilization systems in paddy fields, and its impact on bacterial communities involved in bioelectricity production. Graphite (anode) and carbon (cathode) electrode MFC systems were configured and assembled in organic and conventionally fertilized paddy fields. The anode and bulk soil-associated bacterial communities were examined using high-throughput Illumina MiSeq sequencing platform. Our results revealed that the maximum electricity production and power density were observed in CFPF-MFC with less methane emission compared to OFPF-MFC. The next-generation sequencing (NGS) libraries showed that the bacterial population was significantly increased in the organic-fertilized field and the enhanced occurrence of the Geobacteraceae family in CFPF-MFC anode. By enhancing Geobacteraceae occurrence on the anode, the conventional fertilization improved the bioelectricity production with less methane emission. Further extension in the establishment of plant MFCs in various sedimentary environments will solve the global energy crisis.

中文翻译：

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长期有机施肥和常规施肥对稻田微生物燃料电池生物发电所涉及的细菌群落的影响

土壤富含有机物，尤其是那些支持植物生长的有机物。这些有机物是可持续能源的可能来源，微生物燃料电池 (MFC) 系统可能用于此目的。在这种情况下，植物根部排出的土壤有机物可能通过微生物代谢过程转化为电能。MFC 系统与活植物根系的整合是一种新方法，它将促进能源生产的可持续资源。因此，本研究的目的是电化学评估稻田有机和常规施肥系统下稻田 MFCs (PF-MFCs) 的性能和甲烷排放，及其对参与生物发电的细菌群落的影响。石墨（阳极）和碳（阴极）电极 MFC 系统在有机和常规施肥的稻田中配置和组装。使用高通量 Illumina MiSeq 测序平台检查阳极和大块土壤相关细菌群落。我们的结果表明，与 OFPF-MFC 相比，CFPF-MFC 的最大发电量和功率密度具有更少的甲烷排放。下一代测序（NGS）文库表明，有机肥田中细菌种群显着增加，CFPF-MFC阳极中地杆菌科的发生率增加。通过提高阳极上地杆菌科的发生率，常规施肥提高了生物发电量，减少了甲烷排放。