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Biochar promoted halophyte growth and enhanced soil carbon stock in a coastal salt-affected soil

  • Soils, Sec 3 • Remediation and Management of Contaminated or Degraded Lands • Research Article
  • Published:
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Abstract

Purpose

Biochar, as a stable carbon-rich material, has received concentrated attention in soil quality improvement, especially in soil carbon sequestration. This study aimed to find out the effects of biochar application on carbon stock in the whole salt-affected soil ecosystems.

Methods

This study was conducted in a heavy salt-affected soil, aiming at investigating biochar application effects on salt-affected soil organic carbon (SOC), soil inorganic carbon (SIC), as well as plant (Tamarisk chinensis) biomass carbon stocks.

Results

After 4 years of biochar application of 30, 60, and 90 t ha−1, the results showed that biochar increased soil total organic carbon (STOC) stock by 54.78, 160.44, and 198.33%, and biochar increased soil total inorganic carbon (STIC) stock by 13.85, 11.04, and 16.03%, respectively. Further, it is calculated that biochar increased native SOC (extra SOC excluding biochar carbon) by 7.63, 66.15, and 56.90% and SIC by 13.55, 10.44, and 15.12%, respectively. In addition, biochar application accelerated Tamarisk chinensis growth by 10.03, 23.54, and 11.28%, respectively. Combining all the SOC, SIC, and plant-derived carbon, it is concluded that biochar application enlarged salt-affected soil-vegetation ecosystem carbon stock by 23.36, 47.80, and 58.10%, respectively.

Conclusion

These results indicated that applying biochar in salt-affected soil can enhance salt-affected soil-vegetation ecosystem carbon stocks. The mechanisms behind this phenomenon may be that biochar improves soil water content and bulk density, which promotes Tamarisk chinensis growth. Biochar has a good potential to improve salt-affected soil quality and mitigate climate change.

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Data Availability

Data are available upon request to the corresponding author (Xinliang Dong).

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Acknowledgements

There is great appreciation from all authors for the technical staff who worked in the biochar applied experiment.

Funding

This study was supported by the National Key Research and Development Program of China (2021YFE0114500).

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Authors and Affiliations

  1. Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang, 050022, China

    Tong Liu, Xuejia Zhang, Xinliang Dong, Kai Guo, Jintao Wang, Xiaojing Liu & Hongyong Sun

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Tong Liu, Xuejia Zhang, Xiaojing Liu & Hongyong Sun

  3. University of New England, Armidale, NSW, 2351, Australia

    Bhupinder Pal Singh

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  1. Tong Liu
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Contributions

D.X., G.K., S.H., and L.X. contributed to the long-term experiment conception and design, and D.X. and W.J. contributed to this research conception and design. L.T., Z.X., and D.X. performed the material preparation, data collection, and analysis. The first draft of the manuscript was written by L.T., and B.P.S. commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Xinliang Dong.

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Liu, T., Zhang, X., Dong, X. et al. Biochar promoted halophyte growth and enhanced soil carbon stock in a coastal salt-affected soil. J Soils Sediments (2024). https://doi.org/10.1007/s11368-024-03774-1

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