| 冉玥,代群威,张永德,郭军,王维富,高俊,山静,蒋瑞阳,谢远杰.耐盐碱土著菌的解钾性能及其对盐渍土钾素的影响研究[J].干旱地区农业研究,2025,(4):211~218 |
| 耐盐碱土著菌的解钾性能及其对盐渍土钾素的影响研究 |
| 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 |
| 中文关键词: 耐盐碱菌 盐渍土 解钾性能 钾长石 溶解性有机质（DOM） |
| 英文关键词:saline\|alkali tolerant bacteria saline soil dissolve potassium potassium feldspar dissolved organic matter(DOM) |
| 基金项目:国家自然科学基金-区域创新发展联合基金（U21A2016） |
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| 中文摘要: |
| 为利用盐渍土壤存在的大量含钾矿物，改善土壤盐渍化造成的土壤退化和生态环境恶化的问题，本研究基于微生物法，从硫酸盐型盐渍土中分离筛选出3株耐盐碱菌株，以土壤矿物钾长石为底物，在实验室开展批量试验，利用火焰原子吸收光度法、三维荧光光谱-平行因子分析法、扫描电镜（SEM）等方法，对其解钾性能和机理进行研究和分析，并挑选其中解钾性能最优的菌株进行接种试验，探究该菌株对盐渍土中钾素变化的影响。结果表明：供试3株菌均为革兰氏阳性芽孢杆菌，且均能耐受极端盐碱环境，解钾量能达到18.8 mg·L-1。与不接菌对照相比，3株菌均能使发酵液的pH降低，且对难溶性含钾矿物有一定程度的溶蚀作用，因此初步推测菌株通过分泌某种酸性物质溶解矿物；施NYJ01菌后盐渍土壤有效钾含量相对提高13.76 mg·kg-1，该菌可作为盐渍土改良的候选菌株。 |
| 英文摘要: |
| 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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