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Responses of paddy soil bacterial community assembly to different long-term fertilizations in southeast China

Lookup NU author(s): Dr Yongjie Yu, Dr Evangelos Petropoulos

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


Abstract

© 2018 Elsevier B.V. Recent works have shown that long-term fertilization has a critical influence on soil microbial communities; however, the underlying ecological assemblage of microbial community as well as its linkage with soil fertility and crop yield are still poorly understood. In this study, using analysis of high-throughput sequencing of 16S rRNA gene amplicons, we investigate mean pairwise phylogenetic distance (MPD), nearest relative index (NRI), taxonomic compositions and network topological properties to evaluate the assembly of the soil microbial community developed in 30-year fertilized soils. The phylogenetic signal indicates that environmental filtering was a more important assembly process that structure the microbial community than the stochastic process. Increase of soil fertility indexes, such as cation exchange capacity (CEC), soil organic matter (SOM) and available P (AP), driven by balanced fertilizations and straw returning amendment, result in the decrease of environmental filtering on the bacterial community assembly. Network parameters show that the amendment of straw returning provides with more niches, which lead to more complex phylotype co-occurrence. Increase of crop yield under balanced fertilizations might due to the increase of soil microbial function traits, which is associated with decreasing influence of environmental filtering. The significantly increased bacterial genera, Candidatus Koribacter, Candidatus Solibacter, and Fimbriimonas, in straw returning treatments, might be the key species in the competition caused by long-term environmental filtering. These results are helpful for a unified understanding of the ecological processes for microbial communities in different fertilized agroecosystem and the development of sustainable agriculture.


Publication metadata

Author(s): Yu Y, Wu M, Petropoulos E, Zhang J, Nie J, Liao Y, Li Z, Lin X, Feng Y

Publication type: Article

Publication status: Published

Journal: Science of the Total Environment

Year: 2019

Volume: 656

Pages: 625-633

Print publication date: 15/03/2019

Online publication date: 26/11/2018

Acceptance date: 24/11/2018

Date deposited: 19/02/2019

ISSN (print): 0048-9697

ISSN (electronic): 1879-1026

Publisher: Elsevier BV

URL: https://doi.org/10.1016/j.scitotenv.2018.11.359

DOI: 10.1016/j.scitotenv.2018.11.359


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