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Effects of Different Remediation Treatments and Rice Intercropping on the Integrated Quality of Paddy Soils Mildly Contaminated by Cadmium and Copper

Author

Listed:
  • Luxiang Cai

    (College of JunCao Science and Ecology (College of Carbon Neutrality), Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Jinlun Lin

    (College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Mingtian Huang

    (College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Yong Hong

    (College of JunCao Science and Ecology (College of Carbon Neutrality), Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Xuemeng Zhong

    (College of JunCao Science and Ecology (College of Carbon Neutrality), Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Yourui Guo

    (College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Wu You

    (College of JunCao Science and Ecology (College of Carbon Neutrality), Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Qingtie Xiao

    (College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

  • Ruiyu Lin

    (College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China)

Abstract

The issue of soil contamination by heavy metals (HMs) has attracted extensive attention. In the present study, the effects of four remediation measures combined with rice intercropping on the quality of soils were evaluated in a mildly HM-contaminated paddy field. The results showed that better comprehensive remediation effects were found in the intercropping system with high and low Cd-tolerant rice than in the monoculture system. Both foliar spraying of sodium selenite and inoculation with Pseudomonas TCd-1 significantly reduced the Nemerow comprehensive pollution index (NCPI) of the soils. The application of biochar and lime significantly increased the soil fertility index. Among all the treatments, the application of 30 t∙hm −2 biochar and 3600 kg∙hm −2 lime improved soil fertility the most. The lowest single-factor pollution indices (SFPIs) of Cd, Cu, Zn, Ni and Pb and the NCPI of the soils were observed in the treatment with foliar spraying of sodium selenite at 45 mg∙L −1 , showing the greatest comprehensive reduction in soil HMs. The application of 1200 kg∙hm −2 lime and 30 t∙hm −2 biochar and foliar spraying of 45 mg∙L −1 sodium selenite effectively improved the soil quality. Overall, the soil quality of paddy fields dramatically influenced the cleaner production of rice and is of great significance to the maintenance of food security.

Suggested Citation

  • Luxiang Cai & Jinlun Lin & Mingtian Huang & Yong Hong & Xuemeng Zhong & Yourui Guo & Wu You & Qingtie Xiao & Ruiyu Lin, 2024. "Effects of Different Remediation Treatments and Rice Intercropping on the Integrated Quality of Paddy Soils Mildly Contaminated by Cadmium and Copper," Sustainability, MDPI, vol. 16(24), pages 1-20, December.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:24:p:11120-:d:1546992
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    References listed on IDEAS

    as
    1. Aidi Huo & Xing Wang & Zhixin Zhao & Luying Yang & Fangqian Zhong & Chunli Zheng & Ningbo Gao, 2022. "Risk Assessment of Heavy Metal Pollution in Farmland Soils at the Northern Foot of the Qinling Mountains, China," IJERPH, MDPI, vol. 19(22), pages 1-12, November.
    2. Hanxiu Hu & Linlin Gao & Huimin Zhang & Xiaotian Zhou & Jing Zheng & Jingyi Hu & Hongxiang Hu & Youhua Ma, 2022. "Effectiveness of Passivator Amendments and Optimized Fertilization for Ensuring the Food Safety of Rice and Wheat from Cadmium-Contaminated Farmland," Sustainability, MDPI, vol. 14(22), pages 1-16, November.
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