数字农科院2.0

Influence of biocurrent self-generated by indigenous microorganisms on soil quality

文献类型： 外文期刊

作者： Ting Han;Kai Wang;Iranzi Emile Rushimisha;Huike Ye;Yang Sun;Lixia Zhao;Liping Weng;Yongtao Li;Xiaojing Li

作者机构：

关键词： Bacterial community;Biocurrent;Functional gene;Ion transport;Soil quality

期刊名称： Chemosphere

ISSN： 0045-6535

年卷期： 2022 年 307.0 卷

页码：

收录情况： SCIE（2022版） ; EI（2022版）

摘要： The redox process driven by anaerobic respiration is a link between matter conversion and energy exchange in soil biogeochemistry. Microbial extracellular electron transfer forming biocurrents is a force in element cycling and community living in soil. However, the effect of indigenous microorganisms generating biocurrents on soil quality is unclear. We found that soil biocurrent showed little adverse influence on soil pH, cation exchange capacity, and available nitrogen, phosphorus and potassium and deblocked sequestered organic matter (29%). In addition, the bioelectric field derived from biocurrent obviously forced the migration of mineral elements, which was a supplement to the theory of water–salt transport, providing a new perspective on element transport. Moreover, the soil biocurrent directly regulated the availability of Ca and Fe (increase of 7-fold), indicating that electron transfer plays an important role in weathering and mineralization and thus pedogenesis. From a microbial ecology point of view, the soil bacterial richness and diversity were perfectly restored to their original state when the biocurrent stopped; including bacterial functions; although a temporary enrichment of certain species was observed. The above results provide new insights into the interactions between electron transfer and soil quality and confirm the safety of soil bioelectrochemical technology.

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