001053896 001__ 1053896
001053896 005__ 20260203085631.0
001053896 0247_ $$2datacite_doi$$a10.34734/FZJ-2026-01594
001053896 037__ $$aFZJ-2026-01594
001053896 1001_ $$0P:(DE-Juel1)194590$$aBusch, Franziska$$b0
001053896 245__ $$aDynamics of greenhouse gas emissions and nitrogen availability asinfluenced by biochar particles during composting$$f - 2023-08-31
001053896 260__ $$c2023
001053896 300__ $$a60
001053896 3367_ $$2DataCite$$aOutput Types/Supervised Student Publication
001053896 3367_ $$02$$2EndNote$$aThesis
001053896 3367_ $$2BibTeX$$aMASTERSTHESIS
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001053896 3367_ $$0PUB:(DE-HGF)19$$2PUB:(DE-HGF)$$aMaster Thesis$$bmaster$$mmaster$$s1770105016_30270
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001053896 502__ $$aMasterarbeit, University of Bonn, 2023$$bMasterarbeit$$cUniversity of Bonn$$d2023
001053896 520__ $$aIn this study, a 148-day composting of vegetable waste, horse manure and wheat straw wasconducted to investigate the greenhouse gas (GHG) emissions and nitrogen (N) dynamics asinfluenced by the addition of biochar (bc). A special research focus has been placed on theretention of the N-forms by the bc. GHG (CO2, CH4, N2O) were measured with gas chromatographyand mineral N of the compost substrate was analyzed with standard methods (0.01 molL−1 CaCl2). In addition, N retained by bc particles was analyzed by a three-stage extraction procedureand bc particles were also analyzed by 13C NMR spectroscopy. These methods provideda comprehensive insight into the temporal dynamics of GHG emissions, the amount and availabilityof N retained by bc particles, and the change in chemical groups of bc during compostingwith bc amendment. The addition of bc (15%) did not significantly reduce or increase GHGemissions compared to the control (ctrl) compost. Cumulative emissions averaged at 4016(ctrl) and 3706 (bc) g CO2-C m−2, 2171 (ctrl) and 3332 (bc) mg CH4-C m−2 and 715 (ctrl) and562.8 (bc) mg N2O-N m−2. The concentrations of NH4+–N, NO3––N, NO2––N did not differ significantlybetween the treatments, but significantly higher (54%) total amounts of NO3––N (gpile−1) were measured for the whole compost pile in the bc treatment, indicating lower NO3–1losses throughout the composting. The retention of N forms by bc particles was not reflectedin significantly lower N2O emissions. However, N forms were effectively retained in varyingdegrees of strength by the bc particles. The NH4+–N concentrations that could be extractedfrom the bc particles decreased during the composting process. The percentage distributionshows a clear transition from predominantly plant-available (55%) at the beginning of compostingto predominantly tightly bound (75%) NH4+–N in the final compost. At the end of thecomposting process, the extractable NO3––N concentration from bc particles was 164 mg kg−1(easily extractable), 80 mg kg−1 (not available) and 194 mg kg−1 (strongly retained). Until thelast day of composting, these concentrations increased continuously with a distribution towardsrather strongly bound NO3––N. It can be concluded that the addition of bc tended toprotect against N losses.
001053896 536__ $$0G:(DE-HGF)POF4-2173$$a2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217)$$cPOF4-217$$fPOF IV$$x0
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001053896 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)194590$$aForschungszentrum Jülich$$b0$$kFZJ
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