Potential use of digestate and wood ash as tree fertiliser
2022
ZusevicaZuševica, Austra, Austra | DuminsDūmiņš, Kārlis, Karlis | VendinaVendiņa, Viktorija, Viktorija | ZigureŽīgure, Sindija, Sindija | LazdinaLazdiņa, Dagnija, Dagnija | AdamovicsAdamovičs, Aleksandrs, Aleksandrs
The waste products obtained in the process of biogas and wood cogeneration – digestate and wood ash – can potentially be used as a fertilizer, because digestate has a high nitrogen content, while wood ash contains a lot of phosphorus and potassium. The aim of the study was to find out the optimal dose of ash and digestate for fertilizing woody plants. Forest soil poor in potassium and phosphorus (pH = 4.3) was used as a substrate, which was supplemented with a mixture of digestate and ash in different proportions. Evaluating the results, it can be concluded that all proportions of fertilization significantly improve both the morphological and physiological parameters of the cuttings, compared to the non-fertilized version.
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