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Effects of biochar on soil chemical properties: A global meta-analysis of agricultural soil

Author

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  • Zenghui Sun

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Collegeof Life Sciences, Yulin University, Yulin, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Ya Hu

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Lei Shi

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Gang Li

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Zhe Pang

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Siqi Liu

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Yamiao Chen

    (Shaanxi Provincial Land Engineering Construction Group Co., Xi'an, P.R. China
    Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural and Resources of China, Xi'an, P.R. China)

  • Baobao Jia

    (Shaanxi Tourism Group Co., Ltd, Xi'an, P.R. China)

Abstract

Improved soil properties are commonly reported benefits of adding biochar to agriculture soils. To investigate the range of biochar's effects on soil chemical properties (e.g., soil pH, electrical conductivity (EC), cation exchange capacity (CEC), soil organic carbon (SOC), soil total carbon (TC), and soil carbon-nitrogen ratio (C:N ratio)) in response to varied experimental conditions, a meta-analysis was conducted on previously published results. The results showed that the effect of biochar on soil chemical properties varied depending on management conditions, soil properties, biochar pyrolysis conditions, and biochar properties. The effect size (Hedges'd) of the biochar was greatest for SOC (0.50), the C:N ratio of soil (0.44), soil pH (0.39), TC (0.35), EC (0.21), and CEC (0.20). Among the various factors examined by aggregated boosted tree analysis, the effects of biochar on soil chemical properties were largely explained by the biochar application rate, initial soil pH, and soil sand content. In conclusion, our study suggests that improving soil chemical properties by adding biochar not only requires consideration of biochar application rates and chemical properties but also the local soil environmental factors, especially soil initial pH and sand content of the soil, should be considered.

Suggested Citation

  • Zenghui Sun & Ya Hu & Lei Shi & Gang Li & Zhe Pang & Siqi Liu & Yamiao Chen & Baobao Jia, 2022. "Effects of biochar on soil chemical properties: A global meta-analysis of agricultural soil," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 68(6), pages 272-289.
    • Handle: RePEc:caa:jnlpse:v:68:y:2022:i:6:id:522-2021-pse
    DOI: 10.17221/522/2021-PSE
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    References listed on IDEAS

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    1. Faloye, O.T. & Alatise, M.O. & Ajayi, A.E. & Ewulo, B.S., 2019. "Effects of biochar and inorganic fertiliser applications on growth, yield and water use efficiency of maize under deficit irrigation," Agricultural Water Management, Elsevier, vol. 217(C), pages 165-178.
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    1. Haiyan Liang & Liyu Yang & Qi Wu & Liang Yin & Cuiping Meng & Pu Shen, 2022. "Exogenous glucose modulated the diversity of soil nitrogen-related bacteria and promoted the nitrogen absorption and utilisation of peanut," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 68(12), pages 560-571.

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