Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (23): 45-54.doi: 10.11924/j.issn.1000-6850.casb2023-0089

Special Issue: 资源与环境 农业生态

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Diversity of Fungi in the Rhizosphere Soil of Phragmites australis in the Sandy Land and Saline-alkali Land at the Southern Margin of the Badain Jaran Desert

XIONG Jianzhou1,2(), QI Yake1,2, LI Chaozhou1,2(), JIAO Jian3   

  1. 1College of Life Science and Technology, Gansu Agricultural University, Lanzhou 730070
    2Gansu Provincial Key Laboratory of Arid land Crop Science/Gansu Agricultural University, Lanzhou 730070
    3College of Forestry, Gansu Agricultural University, Lanzhou 730070
  • Received:2023-01-21 Revised:2023-03-18 Online:2023-08-10 Published:2023-08-10

Abstract:

The fungal diversity and its relevant influencing factors of reed rhizosphere soil in sandy land and saline-alkali land at the southern margin of Badain Jaran Desert were studied. Typical sandy land and saline-alkali land were selected at the edge of desert in Linze County, Zhangye City, Gansu Province, and the soils from four quadrates were collected (reed rhizosphere soils in saline-alkali land noted as YL, bare area soil in saline-alkali land noted as YD, reed rhizosphere soils in sandy land noted as SL and bare area soil in sandy land noted as SD) as experimental materials, determination and analysis of the soil fungal diversity in various plots was carried out by using high-throughput sequencing technology. The results showed that the fungal abundance of the soils in sandy lands was significantly higher than that in saline-alkali lands. Ascomycota and Basidiomycota were the dominant phyla in common in the soils of all quadrates, among which Ascomycota was the first dominant phylum, Basidiomycota was the second, and Hair follicle was the third dominant phylum, while Olpidiomycota existed only in YL, which was the fourth dominant bacterial phylum. The species diversity of fungal community was YL>YD>SL>SD; the order of fungal community uniformity was YL>YD>SD>SL, indicating that fungal species were the most balanced in YL, and fungi dominant species had the highest proportion in all fungi in SL. The composition of fungal communities in each soil of the quadrates was highly specialized, and the dominant flora differed significantly in different quadrates; Relevant analysis also showed that the soil water content was YL>YD>SL>SD, soil available phosphorus content and electrical conductivity were YD>YL>SD>SL; canonical correlation analysis (CCA) showed that nutrient factors and soil enzyme activities were related to soil microbial abundance significantly, and soil alkaline-hydrolyzed nitrogen content and pH value had the most significant effects on fungal communities. The inter-root distribution of reed can effectively improve the physicochemical properties and microbial community structure of saline and sandy soils.

Key words: Phragmites australis, saline-alkali land, sandy land