数字农科院2.0

Long-term saline water irrigation affected soil carbon and nitrogen cycling functional profiles in the cotton field

文献类型： 外文期刊

作者： Shuang Zhou;Guangshuai Wang;Qisheng Han;Junpeng Zhang;Hongkai Dang;Huifeng Ning;Yang Gao;Jingsheng Sun

作者机构：

关键词： carbon cycle;functional genes;nitrogen cycle;saline water irrigation;soil metagenomics

期刊名称： Frontiers in Microbiology

ISSN： 1664-302X

年卷期： 2024 年 15 卷

页码：

收录情况： SCIE（2024版）

摘要： Saline water irrigation (SWI) plays an important role in alleviating water resource shortages. At the same time, the salt input of irrigation water affects soil microorganisms which participate in various ecological processes of terrestrial ecosystems. However, the responses of soil microbial functional potential to long-term SWI remains unclear. Therefore, Metagenomics method was utilized in cotton fields under long-term SWI to reveal the microbial functional profiles associated with soil carbon and nitrogen cycles. Results indicated that SWI impacted the microbial functional profiles of soil carbon and nitrogen cycles in the cotton fields significantly. Especially, irrigation water salinity inhibited the relative abundances of sacC and vanB, which are soil carbon degradation genes. SWI also affected the functional gene abundance of nitrogen degradation, dissimilatory nitrate reduction, and nitrification. Moreover, SWI significantly increased the abundance of Candidatus_Cloacimonetes in both carbon and nitrogen cycles. In the discussion, we used person analysis found that soil salinity, pH, and ammonium nitrogen were important factors affecting the abundance of functional genes and microbial taxa. Overall, this study indicated that long-term SWI significantly influenced specific microbial functional genes and taxa abundance, which may lead to predictable outcomes for soil carbon and nitrogen cycling, and is of great importance in exploring the impact of SWI on soil environments.

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