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Agroenvironmental Performances of Biochar Application in the Mineral and Organic Fertilization Strategies of a Maize–Ryegrass Forage System

Author

Listed:
  • Carla Scotti

    (CREA Zootecnia e Acquacoltura Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, I-26900 Lodi, LOM, Italy)

  • Chiara Bertora

    (UPTOFARM s.r.l., I-10095 Grugliasco, TO, Italy)

  • Massimo Valagussa

    (MAC Minoprio Analisi e Certificazioni s.r.l., I-22070 Vertemate Con Minoprio, CO, Italy)

  • Lamberto Borrelli

    (CREA Zootecnia e Acquacoltura Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, I-26900 Lodi, LOM, Italy)

  • Giovanni Cabassi

    (CREA Zootecnia e Acquacoltura Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria, I-26900 Lodi, LOM, Italy)

  • Alberto Tosca

    (Fondazione Minoprio, I-22070 Vertemate Con Minoprio, CO, Italy)

Abstract

Biochar, included as a soil amendment by EU Regulation 2019/1009, has been shown to increase soil organic C stock and nutrient retention. We investigated the effect of biochar incorporation alone (B) and in association with mineral (BMin), digestate (BDig) and slurry (BSlu) fertilization, compared to the respective controls without biochar (C, Min, Dig and Slu), in a silage maize–Italian ryegrass rotation, on yield, soil fertility parameters and nitrous oxide (N 2 O) emissions. Two types of biochar in three doses (0.2, 0.45, 0.9%) were tested in two cropping seasons. Biochar did not significantly affect maize yield; however, BDig tended to increase silage yield and the ear component compared to Dig, while BMin tended to reduce maize N uptake compared to Min. Biochar incorporation significantly increased soil organic C (+31%) and cation exchange capacity (CEC) (+13%) in all the fertilization treatments; BMin and BDig also showed an increase compared to biochar alone (B). Emission of N 2 O was mainly driven by fertilization, digestate exhibiting the highest emissions. Biochar addition decreased the cumulative N 2 O emissions consistently in all the fertilization treatments, though not significantly. The association of biochar with organic fertilizers, in particular digestate, appears promising in increasing the fertilizer efficiency and reducing N 2 O emissions.

Suggested Citation

  • Carla Scotti & Chiara Bertora & Massimo Valagussa & Lamberto Borrelli & Giovanni Cabassi & Alberto Tosca, 2022. "Agroenvironmental Performances of Biochar Application in the Mineral and Organic Fertilization Strategies of a Maize–Ryegrass Forage System," Agriculture, MDPI, vol. 12(7), pages 1-20, June.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:7:p:925-:d:848362
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    References listed on IDEAS

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    1. Simon Kizito & Hongzhen Luo & Jiaxin Lu & Hamidou Bah & Renjie Dong & Shubiao Wu, 2019. "Role of Nutrient-Enriched Biochar as a Soil Amendment during Maize Growth: Exploring Practical Alternatives to Recycle Agricultural Residuals and to Reduce Chemical Fertilizer Demand," Sustainability, MDPI, vol. 11(11), pages 1-22, June.
    2. Qi Zhang & Jing Xiao & Jianhui Xue & Lang Zhang, 2020. "Quantifying the Effects of Biochar Application on Greenhouse Gas Emissions from Agricultural Soils: A Global Meta-Analysis," Sustainability, MDPI, vol. 12(8), pages 1-14, April.
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