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Gewählte Master / Diploma Thesis:

Anders Constantin T Sørensen (2021): From bone to bread – Using bone derived charcoal as nitrogen fertilizer.
Master / Diploma Thesis - Institut für Verfahrens- und Energietechnik (IVET), BOKU-Universität für Bodenkultur, pp 50. UB BOKU obvsg FullText

Data Source: ZID Abstracts
Bone derived charcoal (bone char) was tested in a Neubauer bioassay using cereal rye (Secale cereale L) in 18-day pot experiment. The short-term plant available nitrogen was targeted by only supplying the crops with a nitrogen-free nutrient solution. Furtherly the adsorptive power of the bone char by testing an ammonium enriched version of each bone char variant together with two bone char variants enriched with biogas digestate. The bone chars were pyrolyzed from abattoir waste produced from either cow or pig with two variants containing pyrolyzed pig manure. The CEC of all bone char was analyzed with the ammonium-acetate method and the total C, H and N content was quantified with an elemental analysis. The cow bone char supplied the plants with the most nitrogen and appeared to also contain a small portion of plant available nitrogen without any ammonium enrichment. Most of the nitrogen preexisting in the bone char was unavailable, while the ammonium enrichment added a substantial amount of plant available N despite the added nitrogen being far lower than the total nitrogen in the bone char. The cow bone had a significantly higher CEC than pig bone indicating that ion exchange play an important role in loading ammonium onto bone char together with precipitation. It appears that the ammonium enrichment may have increased the availability of the preexisting bone char nitrogen by reacting as a mild acid. Some pots seemed to have suffered from a phytotoxic compound on the pig derived bone char which requires further investigation. The ammonium enriched bone char made from cow ribs showed the potential of supplying the crops sufficiently with nitrogen within the 18-day growth period and could be considered a potential remedy for low soil nutrient retention.

Beurteilende*r: Soja Gerhard

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