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| Combined application effects of bentonite and bacillus on nutrient retention in Mu Us Sandy Land soil profiles |
| Received:December 04, 2023 |
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| KeyWord:Mu Us Sandy Land;bentonite;bacillus;physicochemical property;soil column leaching |
| Author Name | Affiliation | E-mail | | CHAI Yaxin | College of Soil and Water Conservation Science and Engineering, Northwest A&F University(Institute of Soil and Water Conservation), Yangling 712100, China | | | NIE Yangmei | College of Soil and Water Conservation Science and Engineering, Northwest A&F University(Institute of Soil and Water Conservation), Yangling 712100, China | | | TIAN Jing | College of Soil and Water Conservation Science and Engineering, Northwest A&F University(Institute of Soil and Water Conservation), Yangling 712100, China | | | WEI Gehong | College of Life Science, Northwest A&F University, State Key Laboratory for Crop Stress Resistance and HighEfficiency Production, Shaanxi Key Laboratory of Agriculture and Environmental Microbiology, Yangling 712100, China | | | WANG Honglei | College of Soil and Water Conservation Science and Engineering, Northwest A&F University(Institute of Soil and Water Conservation), Yangling 712100, China
Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling 712100, China | wanghonglei@nwsuaf.edu.cn |
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| Abstract: |
| To explore the combined application effects of bentonite and bacillus on the release and retention of nitrogen, phosphorus and potassium nutrients in sandy soil, field in-situ and indoor leaching experiments were conducted. Additionally, the effects of two modes （single application of bentonite and mixed application of bentonite and bacillus）on the basic physical and chemical properties of sandy soil, profile nutrient status, and different addition levels of bentonite（0.50%, 1.00%, and 3.00%）on the leaching of sandy soil nutrients were explored. The results showed that the three bentonite addition levels significantly increased the moisture content of sandy soil by 32.14% -99.41%. The mixed application of bentonite + bacillus steadily increased the soil available nutrient content, especially in the 3.00% treatment group, which increased by 56.76%-87.24%. Bentonite reduced the leaching of soil available nutrients and enhanced soil fertility. The 3.00% treatment significantly reduced the leaching loss of soil available potassium by 46.38%. In sandy soils, bentonite combined with bacillus can enhance the effectiveness of soil moisture and nutrients and the 3.00% bentonite combined with bacillus can increase the content of available phosphorus and potassium. |
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