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| Effects of earthworms in antimony-contaminated soil on rape growth and soil characteristics |
| Received:November 11, 2022 Revised:February 14, 2023 |
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| KeyWord:antimony;oilseed rape;Eisenia fetida;soil enzyme;microorganism diversity |
| Author Name | Affiliation | E-mail | | BAI Jing | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Hunan Provincial Key Laboratory for the Development, Utilization and Safety Control of Characteristic Agricultural Resources, Loudi 417000, China | | | LIU Honghui | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | LU Dan | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | NONG Zhou | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | MA Jiangtao | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | CHEN Linyu | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China | | | ZHENG Yu | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Hunan Provincial Key Laboratory for the Development, Utilization and Safety Control of Characteristic Agricultural Resources, Loudi 417000, China | | | XIANG Guohong | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Hunan Provincial Key Laboratory for the Development, Utilization and Safety Control of Characteristic Agricultural Resources, Loudi 417000, China | | | DUAN Renyan | College of Agriculture and Biotechnology, Hunan University of Humanities, Science and Technology, Loudi 417000, China
Hunan Provincial Key Laboratory for the Development, Utilization and Safety Control of Characteristic Agricultural Resources, Loudi 417000, China | duanrenyan78@163.com |
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| Abstract: |
| To explore the effects of earthworms on the growth and enrichment in oilseed rape under antimony stress, the effects of Eisenia fetida on the biomass and heavy metal bioconcentration of oilseed rape in antimony-contaminated soil were studied via a pot experiment. The rhizosphere soil characteristics of oilseed rape under antimony pollution and the effects of E. fetida were analyzed from three perspectives:soil nutrients, enzyme activities, and bacterial communities. The results showed that:in antimony-contaminated soil, E. fetida could increase the biomass of oilseed rape and promote the enrichment of antimony in oilseed rape. The enrichment content of antimony in Nanyouza No.1 reached 358.30 mg·kg-1. Antimony significantly inhibited the activities of catalase, sucrase, and urease(P<0.05). E. fetida significantly increased these activities in the rhizosphere soil of the two cultivars of oilseed rape. The maximum activation rates were 13%-31%, 15%-48% and 24%-44%, respectively. Redundancy analysis showed that total phosphorus, total nitrogen, and available nitrogen were important factors affecting soil enzyme activity. The addition of E. fetida did not change the composition of dominant bacteria in the rhizosphere soil of oilseed rape, but mainly increased the abundance of Bacteroidetes, Cyanobacteria, and Chloroflexi. Among them, Bacteroidetes were significantly correlated with catalase and urease activity. The combination of earthworms and oilseed rape might lower the level of antimony in agricultural soil and contribute in certain ways to remediation. Compared to Fengyou 958, Nanyouza 1 has a greater potential for antimony removal. |
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