The Response of Soil Bacterial Communities to Cropping Systems in Saline-Alkaline Soil in the Songnen Plain

文献类型： 外文期刊

第一作者： Liu, Xiaoqian

作者： Liu, Xiaoqian;Zhu, Dan;Li, Bin;Yan, Bohan;Mao, Lina;Sun, Lei;Li, Xin;Ding, Junnan;Li, Jingyang;Sun, Guangyu;Li, Xin

作者机构：

关键词： saline-alkaline soil; bacteria communities; function prediction; co-occurrence network; community assembly process

期刊名称：AGRONOMY-BASEL （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 12 期

页码：

收录情况： SCI

摘要： The high salt content in saline-alkaline land leads to insufficient nutrients, thereby reducing agricultural productivity. This has sparked widespread interest in improving saline-alkaline soil. In this investigation, 16S rRNA gene high-throughput sequencing was employed to examine the impacts of three cropping systems (monoculture, rotation, and mixture) on soil bacterial communities. It was found that cropping rotations and mixtures significantly increased soil bacterial alpha-diversity. Random forest analysis showed a significant linear relationship between AK and EC and bacterial alpha-diversity. In addition, principal coordinates analysis (PCoA) further confirmed the significant differences in beta-diversity between different soil layers. Through co-occurrence network analysis, it was found that cropping rotations and mixtures increased the stability and complexity of co-occurrence networks. By calculating NST to analyze the assembly process of soil bacterial communities in different cropping systems, it was found that the assembly process of soil bacterial communities was dominated by a stochastic process. Functional prediction results showed that a large number of C, N, and S cycling microbes appeared in soil bacterial communities. Our study aims to establish a fresh perspective on the improvement and recovery of saline-alkaline soil.

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