Responses of microbial communities to a gradient of pig manure amendment in red paddy soils

文献类型： 外文期刊

第一作者： Li, Pengfa

作者： Li, Pengfa;Liu, Ming;Wu, Meng;Jiang, Chunyu;Liu, Kai;Li, Zhongpei;Li, Pengfa;Liu, Ming;Wu, Meng;Liu, Kai;Li, Zhongpei;Ma, Xiaoyan;Liu, Jia

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关键词： Pig manure; High-throughput sequencing; Bacterial and fungal communities; Heavy metals; Niche breadth; Co-occurrence network

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：7.963； 五年影响因子：7.842 ）

ISSN： 0048-9697

年卷期： 2020 年 705 卷

页码：

收录情况： SCI

摘要： Microbial communities play a key role in maintaining agroecosystem functioning and sustainability, but their response to excessive animal manure application and relevant mechanisms have not been thoroughly elucidated to date. This study investigated the responses of soil bacterial and fungal communities to pig manure (PM) amendment in red paddy soils. High-throughput sequencing revealed that PM amendment significantly reduced the relative abundance of Acidobucteria yet increased that of Bucteroidetes, Ignavibacteriae, Firmicutes, and Rozellomycota. The Cu and available phosphorus were the primary impact factors influencing bacterial and fungal diversity, respectively. Bacterial alpha-diversity tended to sharply decrease when the content of soil Cu was >30.70 mg kg(-1), while fungal alpha-diversity did not continuously increase when the content of soil available phosphorus was >82.84 mg kg(-1). Bacterial communities with a wider niche breadth showed significantly lower structural variation, whereas fungal communities with a narrower niche breadth showed greater variation in community structure. Soil heavy metals, primarily Cu and Zn, were the primary factors that affected bacterial communities, whereas soil fungal communities were mainly influenced by soil phosphorus. Bacterial and fungal communities showed distinct co-occurrence patterns, with bacterial communities showing a higher degree, a clustering coefficient, and betweenness centrality, but a lower closeness centrality. The findings highlighted that bacteria and fungi responded differently to PM amendment because of their discrepant niche breadth, interspecific relationships, and different tolerance to heavy metal and soil nutrient. (C) 2019 Elsevier B.V. All rights reserved.

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