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Soil salinity is the main factor influencing the soil bacterial community assembly process under long-term drip irrigation in Xinjiang, China

文献类型： 外文期刊

作者： Li, Dongwei 1 ; Qiu, Husen 2 ; Tian, Guangli 1 ; Zhao, Yulong 1 ; Zhou, Xinguo 1 ; He, Shuai 4 ;

作者机构： 1.Chinese Acad Agr Sci, Farmland Irrigat Res Inst, Xinxiang, Henan, Peoples R China

2.Suzhou Univ, Sch Environm & Surveying Engn, Suzhou, Anhui, Peoples R China

3.Jiangsu Vocat Coll Agr & Forestry, Sch Agron & Hort, Jurong, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Northwest Oasis Water Saving Agr, Shihezi, Xinjiang, Peoples R China

关键词： long-term drip irrigation; saline-alkali soil; bacterial community; null model; assembly processes

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.2； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： Identifying the potential factors associated with the impact of long-term drip irrigation (DI) on soil ecosystems is essential for responding to the environmental changes induced by extensive application of DI technology in arid regions. Herein, we examined the effects of the length of time that DI lasts in years (NDI) on soil bacterial diversity as well as the soil bacterial community assembly process and the factors influencing it. The results showed that long-term DI substantially reduced soil salinity and increased soil bacterial diversity while affecting the soil bacterial community structure distinctly. Null model results showed that the soil bacterial community assembly transitioned from stochastic processes to deterministic processes, as NDI increased. Homogeneous selection, a deterministic process, emerged as the dominant process when NDI exceeded 15 years. Both random forest and structural equation models showed that soil salinity was the primary factor affecting the bacterial community assembly process. In summary, this study suggested that soil bacteria respond differently to long-term DI and depends on the NDI, influencing the soil bacterial community assembly process under long-term DI.

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