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Application of Individual Digestate Forms for the Improvement of Hemp Production

Author

Listed:
  • Jiří Velechovský

    (Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic)

  • Matěj Malík

    (Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic)

  • Lukáš Kaplan

    (Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic)

  • Pavel Tlustoš

    (Department of Agroenvironmental Chemistry and Plant Nutrition, Czech University of Life Sciences Prague, Kamýcká 129, 165 00 Prague, Czech Republic)

Abstract

In a two-year vegetation field experiment, the fertilizing effects of by-products from the agricultural biogas plant—a solid phase of digestate (SPD) and a liquid phase of digestate (LPD)—were studied and compared with mineral fertilization (NPK) on the biomass yield, content and nutrient uptake by Cannabis sativa L. plants. Furthermore, the agrochemical properties of the soil were evaluated at the end of the experiment. In all variants of the experiment, a uniform nitrogen dose of 150 kg/ha was applied. The dose of other nutrients corresponded to the fertilizer used. The biggest fertilizing effect, and therefore the greatest hemp biomass yield and nutrient uptake, was demonstrated when combining SPD and LPD fertilization in one treatment. However, the differences were statically insignificant ( p ≤ 0.05). The applied amount appeared to be sufficient for the nutrition of hemp plants and was comparable to mineral fertilization. The distribution of nutrients between leaves and stems varied depending on the nutrient monitored. Analyses after the end of the experiment did not show different contents of accessible nutrients in the soil on the studied variants. The content of accessible risk elements in the soil was not affected by the application of the SPD and the LPD. The experiment showed that cannabis plants are able to achieve equivalent biomass yields (8.68 t/ha) using the combination of LPD and SPD by-products from a biogas plan compared to commercial mineral fertilizer (7.43 t/ha). Therefore, we can recommend a split application of LPD and SPD as a suitable alternative to mineral fertilization. Due to prolonged nutrient release from SPD, we can expect a smaller negative environmental impact than current fertilization practices.

Suggested Citation

  • Jiří Velechovský & Matěj Malík & Lukáš Kaplan & Pavel Tlustoš, 2021. "Application of Individual Digestate Forms for the Improvement of Hemp Production," Agriculture, MDPI, vol. 11(11), pages 1-16, November.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:11:p:1137-:d:678570
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    References listed on IDEAS

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    1. Rasi, S. & Veijanen, A. & Rintala, J., 2007. "Trace compounds of biogas from different biogas production plants," Energy, Elsevier, vol. 32(8), pages 1375-1380.
    2. Abubaker, J. & Risberg, K. & Pell, M., 2012. "Biogas residues as fertilisers – Effects on wheat growth and soil microbial activities," Applied Energy, Elsevier, vol. 99(C), pages 126-134.
    3. Finnan, John & Styles, David, 2013. "Hemp: A more sustainable annual energy crop for climate and energy policy," Energy Policy, Elsevier, vol. 58(C), pages 152-162.
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    1. Milan Koszel & Stanisław Parafiniuk & Sławomir Kocira & Andrzej Bochniak & Artur Przywara & Edmund Lorencowicz & Pavol Findura & Atanas Zdravkov Atanasov, 2024. "Analysis of the Physico-Chemical Properties of Bean Seeds after Three Years of Digestate Use," Agriculture, MDPI, vol. 14(3), pages 1-17, March.
    2. Rebeka Pajura & Adam Masłoń & Joanna Czarnota, 2023. "The Use of Waste to Produce Liquid Fertilizers in Terms of Sustainable Development and Energy Consumption in the Fertilizer Industry—A Case Study from Poland," Energies, MDPI, vol. 16(4), pages 1-24, February.

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