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Intervention of rhamnolipid improves the rhizosphere microenvironment of cotton in desert saline lands

文献类型： 外文期刊

作者： Liu, Qing 1 ; Chen, Chunlei 2 ; Chen, Youhua 2 ; Huang, Binchuan 3 ; Yang, Yuhui 3 ; Zhu, Hao 4 ; Li, Yanhong 1 ; Wang, Xingpeng 3 ; Zhang, Chunfang 1 ;

作者机构： 1.Guilin Univ Technol, Coll Environm Sci & Engn, Guilin 541006, Peoples R China

2.Zhejiang Univ, Inst Marine Biol & Pharmacol, Ocean Coll, Zhoushan 316021, Zhejiang, Peoples R China

3.Tarim Univ, Coll Water Conservancy & Architecture Engn, Alaer 843300, Xinjiang Uygur, Peoples R China

4.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, Shanghai 200092, Peoples R China

关键词： Rhamnolipid; Rhizosphere; Salinization; Microbial community; Soil fertility; Co-occurrence network

期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.1； 五年影响因子：6.9 ）

ISSN： 2352-1864

年卷期： 2023 年 32 卷

页码：

收录情况： SCI

摘要： Rhamnolipids have been extensively studied for the remediation of soils contaminated with petroleum hydrocarbons. However, the literature on the effects of rhamnolipids on the soil microenvironment is scarce. In this study, we adopted a drip irrigation technique to apply a rhamnolipid solution to soil planted with cotton in a saline desert area. The results showed that the addition of rhamnolipids increased soil organic matter by 5.0-31.6 % and reduced soil electrical conductivity by 0.3-42.4 %. Additionally, it improved soil nutrient conditions, reshaped the composition and function of the microbial community in the rhizosphere soil, and ultimately promoted cotton growth by 3.3 - 9.0 %. Simultaneously, the addition of rhamnolipids enriched the diversity of the bacterial community. Although it reduced the diversity of fungal communities, it optimized the community structure of fungi. It is worth noting that higher concentrations of rhamnolipids may have toxic effects on soil fungi, the mechanism of which is unknown. These findings shed new light on understanding the effects of rhamnolipids on rhizosphere soil microorganisms and provide a new direction for sustainable agricultural production.

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