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  • Combined effects of biochar and fertilizer applications on yield: A review and meta-analysis

    Author(s)
    Bai, Shahla Hosseini
    Omidvar, Negar
    Gallart, Marta
    Kämper, Wiebke
    Tahmasbian, Iman
    Farrar, Michael
    Singh, Kanika
    Zhou, Guiyao
    Muqadass, Bushra
    Xu, Cheng-Yuan
    Koech, Richard
    Li, Yujuan
    Nguyen, Thi Thu Nhan
    van Zwieten, Lukas
    Griffith University Author(s)
    Hosseini-Bai, Shahla
    Farrar, Michael
    Year published
    2021
    Metadata
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    Abstract
    The use of biochar is changing, and the combined application of biochar with fertilizer is increasingly gaining acceptance. However, the yield gains results reported in the existing literature through the co-application of fertilizer with biochar are conflicting. To resolve this, we utilized a meta-analysis of 627 paired data points extracted from 57 published articles to assess the performance of the co-application of biochar and fertilizers on crop yield compared with the corresponding controls. We also studied the impact of biochar characteristics, experimental conditions, and soil properties on crop yield. Our analysis ...
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    The use of biochar is changing, and the combined application of biochar with fertilizer is increasingly gaining acceptance. However, the yield gains results reported in the existing literature through the co-application of fertilizer with biochar are conflicting. To resolve this, we utilized a meta-analysis of 627 paired data points extracted from 57 published articles to assess the performance of the co-application of biochar and fertilizers on crop yield compared with the corresponding controls. We also studied the impact of biochar characteristics, experimental conditions, and soil properties on crop yield. Our analysis showed that individually, biochar and inorganic fertilizer increased crop yield by 25.3% ± 3.2 (Bootstrap CI 95%) and 21.9% ± 4.4, respectively. The co-application of biochar with both inorganic and organic fertilizers increased crop yield by 179.6% ± 18.7, however, this data needs to be treated with caution due to the limited dataset. The highest yield increase was observed with amendments to very acidic soils (pH ≤5), but the benefits of biochar were not affected by the rate and the time after the application. In addition, the effects of biochar are enhanced when it is produced at 401-500 °C with a C:N ratio of 31-100. Our results suggest that the co-application of biochar with either inorganic and/or organic fertilizers in acidic soils increase crop productivity compared to amendment with either fertilizer or biochar. Our meta-analysis supports the utilization of biochar to enhance the efficiency and profitability of fertilizers.
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    Journal Title
    Science of The Total Environment
    Volume
    808
    DOI
    https://doi.org/10.1016/j.scitotenv.2021.152073
    Subject
    Environmental sciences
    Agricultural biotechnology
    A sum of Akaike weights
    Fertilizer use efficiency
    Nutrient stoichiometry
    Pyrolysis
    Soil constraint
    Publication URI
    http://hdl.handle.net/10072/411461
    Collection
    • Journal articles

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