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Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil

Author

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  • Ali Mohamed Elyamine

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China
    Department of Life Science, Faculty of Science and Technology, University of Comoros, Moroni 269, Comoros)

  • Mohamed G. Moussa

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China)

  • Marwa A. Ismael

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China
    Botany Department, Faculty of Science, Fayoum University, Fayoum 63514, Egypt)

  • Jia Wei

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China)

  • Yuanyuan Zhao

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China)

  • Yupeng Wu

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China)

  • Chengxiao Hu

    (Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, Research Center of Micro-Elements, College of Resource and Environment, Huazhong Agricultural University, Wuhan 430070, China
    Hubei Provincial Engineering Laboratory for New Fertilizers, Huazhong Agricultural University, Wuhan 430070, China)

Abstract

The joint effects of earthworms and crop straw on toxic metal speciation are not clear, and very limited information is available regarding the effects of their interaction on Cd mobility in Cd contaminated soil or in remediation processes involving plants. This study evaluated their impacts on Cd mobile form changes in soil and their effects on Cd uptake by plants. Treatments included both planted and unplanted-Cd-contaminated soil with or without rice straw and/or earthworms. The results revealed that earthworms, rice straw, and plant interactions change the Cd mobile forms in soil. The order of Cd concentration of different chemical forms was as follows: exchangeable > residual > bound to Fe-Mn oxide > bound to organic matter for earthworms, and exchangeable > bound to organic matter > residual > bound to Fe-Mn oxide for rice straw treatment, with a recovery rate of 96 ± 3%. The accumulation of Cd in plants increased in the presence of earthworms and decreased in the presence of rice straw. FT-IR spectra indicated that the degradation of rice straw increases C–O, C–O–H, C–H, and O–H functional groups which could complex with Cd ions. These findings highlighted that earthworms’ activities and crop straw can modify soil properties and structure and promote the remediation of heavy metal. This study suggests that the ecological context of remediation instead of being limiting on soil-earthworms-plant interaction, should integrate the natural resources forsaken which can provide a positive influence on both plant health and the remediation of heavy metal in contaminated soil.

Suggested Citation

  • Ali Mohamed Elyamine & Mohamed G. Moussa & Marwa A. Ismael & Jia Wei & Yuanyuan Zhao & Yupeng Wu & Chengxiao Hu, 2018. "Earthworms, Rice Straw, and Plant Interactions Change the Organic Connections in Soil and Promote the Decontamination of Cadmium in Soil," IJERPH, MDPI, vol. 15(11), pages 1-20, October.
    • Handle: RePEc:gam:jijerp:v:15:y:2018:i:11:p:2398-:d:179051
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    References listed on IDEAS

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    1. Zhang, Qiuzhuo & Huang, Huiqin & Han, Hui & Qiu, Zhen & Achal, Varenyam, 2017. "Stimulatory effect of in-situ detoxification on bioethanol production by rice straw," Energy, Elsevier, vol. 135(C), pages 32-39.
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    Cited by:

    1. Xiaolian Zhang & Xiuguo Wang & Yalei Liu & Kuan Fang & Tong Liu, 2020. "The Toxic Effects of Sulfoxaflor Induced in Earthworms ( Eisenia fetida ) under Effective Concentrations," IJERPH, MDPI, vol. 17(5), pages 1-14, March.
    2. Lei Shi & Zhaohui Guo & Fang Liang & Xiyuan Xiao & Chi Peng & Peng Zeng & Wenli Feng & Hongzhen Ran, 2019. "Effect of Liming with Various Water Regimes on Both Immobilization of Cadmium and Improvement of Bacterial Communities in Contaminated Paddy: A Field Experiment," IJERPH, MDPI, vol. 16(3), pages 1-14, February.

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