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Characteristics and acidic soil amelioration effects of biochar derived from a typical halophyte Salicornia europaea L. (common glasswort)

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Abstract

Glycophyte biomass − derived biochars have proven to be effective in the amelioration of acidic soil. However, there is scarce information on the characteristics and soil amelioration effects of halophyte-derived biochars. In this study, a typical halophyte Salicornia europaea, which is mainly distributed in the saline soils and salt-lake shores of China, and a glycophyte Zea mays, which is widely planted in the north of China, were selected to produce biochars with a pyrolysis process at 500 °C for 2 h. S. europaea-derived and Z. mays-derived biochars were characterized in elemental content, pores, surface area, and surface functional groups, and then by using a pot experiment their potential utilizable value as acidic soil conditioner was evaluated. The results showed that compared with Z. mays-derived biochar, S. europaea-derived biochar displayed higher pH, ash contents, base cations (K+, Ca2+, Na+, and Mg2+) contents and exhibited more larger surface area and pore volume than Z. mays-derived biochar. Both biochars had abundant oxygen-containing functional groups. Upon treating the acidic soil, the pH of acidic soil was increased by 0.98, 2.76, and 3.36 units after the addition of 1%, 2%, and 4% S. europaea-derived biochar, while it was increased only by 0.10, 0.22, and 0.56 units at 1%, 2%, and 4% Z. mays-derived biochar. High alkalinity in S. europaea-derived biochar was the main reason for the increase of pH value and base cations in acidic soil. Thus, application of halophyte biochar such as S. europaea-derived biochar is an alternative method for the amelioration of acidic soils.

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The data presented in this study are available on request from the corresponding author.

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Funding

This study was funded by the Key Special Project of Intergovernmental International Scientific and Technological Innovation Cooperation of China;s National Key R & D Plan (Grant No. 2021YFE0101100), the National Natural Science Foundation of China (Grant No. U1803233), Xinjiang Water Resources and Hydropower Planning and Design Administration Bureau (Grant No. SQ20200528151870).

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All authors contributed to the study conception and design. SG and CT: material preparation, designed experiments. SG and SW: performed experimental work, analyzed data. SG and LW: first draft of the manuscript. SG, SW, WM, KZ, LW, and MT: supervised the interpretation of results, corrected the manuscript.

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Correspondence to Lei Wang.

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Responsible Editor: Zhihong Xu

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Ge, S., Wang, S., Mai, W. et al. Characteristics and acidic soil amelioration effects of biochar derived from a typical halophyte Salicornia europaea L. (common glasswort). Environ Sci Pollut Res 30, 66113–66124 (2023). https://doi.org/10.1007/s11356-023-27182-z

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  • DOI: https://doi.org/10.1007/s11356-023-27182-z

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