| Potassium\|solubilizing performance of saline\|alkali tolerant indigenous bacteria and its effect on potassium in saline soil |
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| DOI：10.7606/j.issn.1000-7601.2025.04.22 |
| Key Words: saline\|alkali tolerant bacteria saline soil dissolve potassium potassium feldspar dissolved organic matter(DOM) |
| Author Name | Affiliation | | RAN Yue | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | DAI Qunwei | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | ZHANG Yongde | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | GUO Jun | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | WANG Weifu | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | GAO Jun | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | SHAN Jing | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | JIANG Ruiyang | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China | | XIE Yuanjie | Southwest University of Science and Technology, Mianyang, Sichuan 621010, China |
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| Abstract: |
| To utilize the abundant potassium\|containing minerals present in saline\|alkali soil and address the issues of soil degradation and ecological environment deterioration caused by soil salinization, this study was based on the microbial method, three salt\|tolerant strains were isolated and screened from sulfate\|type saline soil,and batch experiments were conducted in the laboratory using soil mineral potassium feldspar as the substrate. The potassium\|solubilizing performance and mechanism were studied and analyzed by flame atomic absorption spectrometry,three\|dimensional fluorescence spectroscopy\|parallel factor analysis,scanning electron microscopy (SEM), and other methods. The strain exhibiting the best potassium\|solubilizing efficiency was selected for inoculation experiments to explore its effect on the change of potassium in saline soil. The results showed that three strains were Gram\|positive Bacillus,and could tolerate extreme saline\|alkali environment,and the amount of potassium solution could reach 18.8 mg·L-1. Compared with the control,three strains could reduce the pH of the fermentation broth and had a certain degree of dissolution on insoluble potassium\|containing minerals. Therefore,it is preliminarily speculated that the strain dissolves minerals by secreting certain acidic substances. The available potassium content in the saline soil increased by 13.76 mg·kg-1after the inoculation of NYJ01. This bacterial strain could serve as a candidate strain for the saline soil improvement. |
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