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| Effects of mixed application of organic materials on saline soil amelioration and fluorescence characteristics of dissolved organic matter |
| Received:March 12, 2024 |
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| KeyWord:saline soil;dissolved organic matter;fluorescence;stalk;biochar;taille hydrothermal lysate |
| Author Name | Affiliation | E-mail | | GAO Meng | School of Environmental, Liaoning University, Shenyang 110161, China
Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110161, China | | | LI Dazhi | Shouguang City Agriculture and Rural Affairs Bureau Rural Social Business Development Center, Weifang 262700, China | | | MA Jian | Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110161, China | mroger@163.com | | SONG Qiaobo | Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110161, China | | | CHEN Xin | Shenyang Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110161, China | |
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| Abstract: |
| A spinach pot experiment containing organic materials was conducted to investigate the fluorescence characteristics of dissolved organic matter（DOM）and the improvement effect of saline-alkali soil. The experimental treatments were：control（CK）, straw alone（S）, biochar alone（B）, straw and vegetable straw hydrothermal lysate co-application（SHA）, and biochar and taille hydrothermal lysate co-application（BHA）. DOM fluorescence characteristics were characterized using parallel factor analysis to resolve the correlation between spinach yield, soil nutrients, and fluorescence components. The results showed that compared with the single application of organic materials, the organic material combination was more effective in improving spinach yield and alleviating soil salinity. The spinach yield of SHA and BHA treatments increased by 159.2% and 81.6% compared with that of CK, respectively. The content of soil organic matter of all treatments increased significantly by 66.3% - 70.2%, among which the SHA treatment had the highest content of organic matter, which amounted to 4.8 g ·kg-1. SHA treatment promotes crop growth mainly by increasing the content of humic substances and tryptophan fractions in DOM of saline soils. The results indicated that combination application of organic materials and humic substances was more suitable and effective for saline soil improvement. |
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