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| Comparative study of physicochemical and microbial communities of different origins of saline-alkali soil |
| Received:January 21, 2025 |
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| KeyWord:saline-alkali soil;base ions;high-throughput sequencing;community composition |
| Author Name | Affiliation | E-mail | | YANG Huixuan | Beijing University of Agriculture, Beijing 102206, China
Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | WANG Yanan | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | | JIA Yuehui | Beijing University of Agriculture, Beijing 102206, China | yhjia@bua.edu.cn | | CHEN Minyu | Chuangxiang Future Bioengineering(Xinjiang)Co., Ltd., Urumqi 831399, China | | | GAO Jinhua | Stanley Agricultural Group Co., Ltd., Linshu 276700, China | | | XIE Xueshi | Stanley Agricultural Group Co., Ltd., Linshu 276700, China | | | ZHOU Li | Stanley Agricultural Group Co., Ltd., Linshu 276700, China | | | ZENG Xibai | Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences, Beijing 100081, China | zengxibai@caas.cn |
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| Abstract: |
| To investigate the differences in nutrient content, salt characteristics, and bacterial community composition in saline-alkali soils of different origins, and to analyze the intrinsic correlations among these factors. The findings aim to provide effective support for the management and remediation of saline-alkali lands. Soil samples were collected from eight distinct sites across three typical saline-alkali regions in Xinjiang, Jilin, and Hebei provinces. Soil nutrient contents and base ion concentrations were analyzed. High-throughput sequencing technology was employed to assess soil bacterial diversity and community composition.The saline-alkali soils from Jilin（JL1, JL2）were characterized by predominant base anions of HCO3- with concentrations exceeding 0.5 g·kg-1. These soils exhibited relatively high soil organic matter and total nitrogen contents, with Actinobacteria identified as the dominant microbial phylum. Xinjiang salinealkali soils（XJ1, XJ2, XJ3, XJ4）were dominated by SO42- base anions and exhibited high Na+ contents, lower microbial abundance and diversity, with Proteobacteria as the predominant phylum. In Hebei saline-alkali soils, HB1 showed HCO3- predominance（0.49 g·kg-1）, while HB2 was dominated by Cl-（29.09 g·kg-1）. Although significant variations in microbial community composition were observed, salt content did not significantly affect microbial abundance or diversity. The content of base ions, dominant microbial populations, and physicochemical properties of saline-alkali soils are closely linked to their origins. Microbial diversity mainly depends on the concentrations of Ca2+, Na+, and other ions, exhibiting distinct geographic distribution patterns. Thus, regional distribution and differences in physicochemical and biological properties must be thoroughly considered when developing saline-alkali land remediation strategies. |
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