| Title | Digestate from an Agricultural Biogas Plant as a Factor Shaping Soil Properties |
|---|---|
| ID_Doc | 12571 |
| Authors | Rolka, E; Wyszkowski, M; Zolnowski, AC; Skorwider-Namiotko, A; Szostek, R; Wyzlic, K; Borowski, M |
| Title | Digestate from an Agricultural Biogas Plant as a Factor Shaping Soil Properties |
| Year | 2024 |
| Published | Agronomy-Basel, 14.0, 7 |
| Abstract | In the context of a circular economy, special attention should be paid to the rational management of biodegradable waste. Currently, a potentially valuable waste material, rich in ingredients available to plants, is digestate, obtained as a by-product in agricultural biogas plants. The presented study aimed to determine the impact of digestate (DIG) from an agricultural biogas plant on soil reaction (pH), electrical conductivity (EC), sorption properties (SBC, HAC, CEC, BS), and chemical composition of soil. The research was based on a pot experiment in which increasing doses of liquid (LD) and solid (SD) forms of DIG were used in corn cultivation, balanced in terms of the amount of N introduced into the soil. The composition of DIG varied and depended on the LD or SD form. The LD was characterized by a lower pH value and higher EC compared to the SD form. The LD contained much less TC, fewer macroelements, and fewer trace elements. The application of LD significantly increased in the soil the content of TC, Ntot, available K, P, Fe, and Mn, and exchangeable cations K+. The SD significantly increased the content of available P, Mg, and Mn and exchangeable cations Ca2+ and Mg2+ in the soil. Both forms of digestate increased the total content of heavy metals (Cu, Cr, Pb, and Ni) in the soil. However, they did not pose a threat to the environment concerning their legally permissible levels. |
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