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Environmental science and pollution research international2020; 27(31); 39391-39401; doi: 10.1007/s11356-020-10031-8

Reduction of Cd accumulation in Se-biofortified rice by using fermented manure and fly ash.

Abstract: Large areas of soils in China are contaminated with Cd and are deficient in Se. Therefore, here, we aimed to reduce Cd accumulation while increasing Se content in rice grain, and to elucidate the mechanisms associated. A greenhouse pot experiment was conducted to determine grain concentrations of Se and Cd upon foliar spraying of Se combined with the application of horse manure and/or fly ash to different contaminated soils containing Cd 0.51 (T1), 1.46 (T2), and 4.59 mg Cd kg (T3). The amount of Fe, Si, and Cd in root iron plaque, and concentrations of Cd and Si in rice tissues were also determined. Foliar spray of Se increased Se concentration in brown rice from approximately 0.04 to 0.15 mg kg. Fly ash significantly reduced Cd concentration in brown rice from 0.07 to 0.05, 0.15 to 0.09, and 1.00 to 0.55 mg kg at the T1, T2, and T3 treatment levels, respectively, and soil Cd bioavailability (by at least 33.3%), while it increased Si content in rice roots and shoots by at least 34%. The increase of Si concentration in rice tissues inhibited Cd translocation to brown rice by at least 17%. Horse manure increased the formation of root Fe plaque by approximately 2.3-fold, which resulted in the significant reduction of Cd accumulation in brown rice, shoots, and roots by 36-56%. Thus, foliar spray of Se in combination with the application of fly ash and horse manure proved an effective method to produce Cd-low and Se-rich rice.
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Publication Date: 2020-07-09 PubMed ID: 32648217DOI: 10.1007/s11356-020-10031-8Google Scholar: Lookup
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Summary

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The research article explores a method to reduce the accumulation of Cadmium (Cd) and increase Selenium (Se) content in rice by using fermented horse manure and fly ash, particularly in soils of China where Cd contamination and Se deficiency are prevalent.

Research Setup and Procedure

  • The researchers conducted greenhouse pot experiments to examine the concentrations of Se and Cd in rice grains. They treated various contaminated soil samples with Se foliar spray along with the application of horse manure and/or fly ash. These soil samples had different Cd concentrations.
  • They also determined the amount of Iron (Fe), Silicon (Si), and Cd present in the iron plaque found in roots. This also included concentrations of Cd and Si in different parts of the rice plant.

Results and Findings

  • The application of Se foliar spray resulted in an increase in brown rice’s Se concentration, escalating from nearly 0.04 mg/kg to 0.15 mg/kg.
  • The use of fly ash led to a significant reduction in Cd concentration in brown rice. This decrease varied depending on the extent of initial Cd contamination in the soil samples. The application of fly ash also led to an increase in root and shoot Si content of the rice plants.
  • The increased Si concentration restricted Cd transportation to different parts of the rice plant, reducing the accumulation in the end product – brown rice.
  • The researchers observed that horse manure played a crucial role in increasing the formation of root iron plaque. This hike resulted in substantial Cd accumulation reduction in different parts of the rice plant including brown rice, shoots, and roots.

Conclusion

  • The experimental results revealed that a combination of Se foliar spray, along with the application of fly ash and fermented horse manure, proved effective in reducing Cd accumulation and boosting Se concentration in rice plants, making it a probable solution to the Cd contamination problem in China’s soils.

Cite This Article

APA
Yin A, Shen C, Huang Y, Yue M, Huang B, Xin J. (2020). Reduction of Cd accumulation in Se-biofortified rice by using fermented manure and fly ash. Environ Sci Pollut Res Int, 27(31), 39391-39401. https://doi.org/10.1007/s11356-020-10031-8

Publication

Environmental science and pollution research international
ISSN: 1614-7499
NlmUniqueID: 9441769
Country: Germany
Language: English
Volume: 27
Issue: 31
Pages: 39391-39401

Researcher Affiliations

Yin, Aiguo
  • School of Biological and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
Shen, Chuang
  • Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology, Hengyang, 421002, China.
Huang, Yingying
  • Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology, Hengyang, 421002, China.
Yue, Maofeng
  • School of Biological and Food Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
Huang, Baifei
  • Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology, Hengyang, 421002, China. huangbaifei@126.com.
Xin, Junliang
  • Research Center for Environmental Pollution Control Technology, School of Safety and Environmental Engineering, Hunan Institute of Technology, Hengyang, 421002, China. hsingjl@126.com.

MeSH Terms

  • Animals
  • Cadmium / analysis
  • China
  • Coal Ash
  • Horses
  • Manure
  • Oryza
  • Soil
  • Soil Pollutants / analysis

Grant Funding

  • 41977147 / National Natural Science Foundation of China

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Citations

This article has been cited 1 times.
  1. Zhang H, Xie S, Du X, Bao Z, Xu F, Awadelseid SF, Yaisamut O. Effects and mechanisms of different exogenous organic matters on selenium and cadmium uptake by rice in natural selenium-cadmium-rich soil. Heliyon 2024 Sep 30;10(18):e37740.
    doi: 10.1016/j.heliyon.2024.e37740pubmed: 39381237google scholar: lookup
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