EFFECTS OF HUMIC ACID ON CHROMIUM SPECIATION, MICROBIAL COMMUNITIES AND ENZYME ACTIVITIES IN RED SOIL TREATMENT SYSTEM PLANTED WITH LEERSIA HEXANDRA SWARTZ

GUO Yue-hong; WANG Jian-sheng; ZHANG Xue-hong; ZHANG Xing-feng; GAO Bo

doi:10.13205/j.hjgc.202112035

Volume 39 Issue 12

Mar. 2022

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GUO Yue-hong, WANG Jian-sheng, ZHANG Xue-hong, ZHANG Xing-feng, GAO Bo. EFFECTS OF HUMIC ACID ON CHROMIUM SPECIATION, MICROBIAL COMMUNITIES AND ENZYME ACTIVITIES IN RED SOIL TREATMENT SYSTEM PLANTED WITH LEERSIA HEXANDRA SWARTZ[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 234-242. doi: 10.13205/j.hjgc.202112035

Citation:

GUO Yue-hong, WANG Jian-sheng, ZHANG Xue-hong, ZHANG Xing-feng, GAO Bo. EFFECTS OF HUMIC ACID ON CHROMIUM SPECIATION, MICROBIAL COMMUNITIES AND ENZYME ACTIVITIES IN RED SOIL TREATMENT SYSTEM PLANTED WITH LEERSIA HEXANDRA SWARTZ[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 234-242. doi: 10.13205/j.hjgc.202112035

Citation:

GUO Yue-hong, WANG Jian-sheng, ZHANG Xue-hong, ZHANG Xing-feng, GAO Bo. EFFECTS OF HUMIC ACID ON CHROMIUM SPECIATION, MICROBIAL COMMUNITIES AND ENZYME ACTIVITIES IN RED SOIL TREATMENT SYSTEM PLANTED WITH LEERSIA HEXANDRA SWARTZ[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 234-242. doi: 10.13205/j.hjgc.202112035

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EFFECTS OF HUMIC ACID ON CHROMIUM SPECIATION, MICROBIAL COMMUNITIES AND ENZYME ACTIVITIES IN RED SOIL TREATMENT SYSTEM PLANTED WITH LEERSIA HEXANDRA SWARTZ

doi: 10.13205/j.hjgc.202112035

1. Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China;
2. Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China;
3. College of Plant and Ecological Engineering, Guilin University of Technology, Guilin 541004, China;
4. College of Tourism & Landscape Architecture, Guilin University of Technology, Guilin 541004, China

Received Date: 2021-01-27
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

The changes of chromium speciation, microbial communities and enzyme activities in red soil treatment system planted with Leersia hexandra Swartz with or without 10 g/kg humic acid were studied. The results showed that residual fraction was dominant in the substrate after humic acid added. The residual fraction was dominant in the stem and leaves while the hydrochloric acid fraction was dominant in the root. The number of bacteria, fungi and actinomycete could be significantly promoted by humic acid, and the maximum number of the three microbial groups was 6.76×10⁷, 4.48×10⁷, 7.71×10⁷ CFU/g. The analysis of enzyme activities showed that humic acid increased the activity of invertase and alkaline phosphatase and decreased the activity of catalase and polyphenol oxidase. The correlation analysis showed that the activities of polyphenol oxidase and catalase were negatively correlated with the number of bacteria and the concentration of humic acid. The number of bacteria, fungi and actinomycetes was positively correlated with the concentration of humic acid. The number of bacteria, fungi and actinomyces were positively correlated with the content of chromium in the substrate residual fraction. A negative correlation existed between invertase and the content of chromium fractions in substrate and in Leersia hexandra Swartz. There was a positive correlation between the activity of polyphenol oxidase and most chromium fractions in Leersia hexandra Swartz.
- humic acid,
- Leersia hexandra Swartz,
- chromium speciation,
- microbial community,
- enzyme activities

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References(52)

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