Assessment of the carbon and nitrogen mineralisation of digestates elaborated from distinct feedstock profiles
- Author
- Gregory Reuland (UGent) , Ivona Sigurnjak (UGent) , Harmen Dekker, Steven Sleutel (UGent) and Erik Meers (UGent)
- Organization
- Abstract
- The carbon (C) and nitrogen (N) mineralisation rates of five digestates were studied and compared with pig slurry, compost, and a solid fraction of digestate in aerobic incubation experiments. The objective was to identify the most relevant drivers of C and N mineralisation based on the physicochemical properties of the products. Net organic nitrogen mineralisation of digestates (N-min,N-net) was on average 30%, although the range was relatively wide, with digestate from pig manure (39%) reaching double the value of digestate from sewage sludge (21%). The total carbon to total nitrogen (TC:TN) (r = -0.83, p < 0.05) and ammonium nitrogen to total nitrogen (NH4+-N:TN) (r = 0.83, p < 0.05) ratios of the products were strongly correlated with N-min,N-net, adequately mirroring the expected fertilising potential of the products. The digestates had C sequestration values between 50 and 81% of applied total organic carbon (TOC), showcasing their potential to contribute to C build-up in agricultural soils. The carbon use efficiency of the amended soils was negatively correlated with dissolved organic carbon (DOC) (r = -0.75, p < 0.05) suggesting that catabolic activities were promoted proportionately to the DOC present in these products. Ratios of DOC:TOC (r = -0.88, p < 0.01) and TC:TN (r = 0.92, p < 0.01) were reliable predictors of the fraction of C that would remain one year after its incorporation and thus could be used as simple quality parameters to denote the C sequestration potential of digestates prior to their use in the field.
- Keywords
- Agronomy and Crop Science, digestate, carbon, nitrogen, manure, carbon use efficiency, carbon sequestration, nitrogen mineralisation, nitrification, Nitrates Directive, DISSOLVED ORGANIC-CARBON, ANAEROBIC-DIGESTION, SHORT-TERM, MICROBIAL COMMUNITY, PHYSICAL PROTECTION, N-MINERALIZATION, PIG SLURRY, SOIL C, EMISSIONS, COMPOST
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-8740487
- MLA
- Reuland, Gregory, et al. “Assessment of the Carbon and Nitrogen Mineralisation of Digestates Elaborated from Distinct Feedstock Profiles.” AGRONOMY-BASEL, vol. 12, no. 2, 2022, doi:10.3390/agronomy12020456.
- APA
- Reuland, G., Sigurnjak, I., Dekker, H., Sleutel, S., & Meers, E. (2022). Assessment of the carbon and nitrogen mineralisation of digestates elaborated from distinct feedstock profiles. AGRONOMY-BASEL, 12(2). https://doi.org/10.3390/agronomy12020456
- Chicago author-date
- Reuland, Gregory, Ivona Sigurnjak, Harmen Dekker, Steven Sleutel, and Erik Meers. 2022. “Assessment of the Carbon and Nitrogen Mineralisation of Digestates Elaborated from Distinct Feedstock Profiles.” AGRONOMY-BASEL 12 (2). https://doi.org/10.3390/agronomy12020456.
- Chicago author-date (all authors)
- Reuland, Gregory, Ivona Sigurnjak, Harmen Dekker, Steven Sleutel, and Erik Meers. 2022. “Assessment of the Carbon and Nitrogen Mineralisation of Digestates Elaborated from Distinct Feedstock Profiles.” AGRONOMY-BASEL 12 (2). doi:10.3390/agronomy12020456.
- Vancouver
- 1.Reuland G, Sigurnjak I, Dekker H, Sleutel S, Meers E. Assessment of the carbon and nitrogen mineralisation of digestates elaborated from distinct feedstock profiles. AGRONOMY-BASEL. 2022;12(2).
- IEEE
- [1]G. Reuland, I. Sigurnjak, H. Dekker, S. Sleutel, and E. Meers, “Assessment of the carbon and nitrogen mineralisation of digestates elaborated from distinct feedstock profiles,” AGRONOMY-BASEL, vol. 12, no. 2, 2022.
@article{8740487, abstract = {{The carbon (C) and nitrogen (N) mineralisation rates of five digestates were studied and compared with pig slurry, compost, and a solid fraction of digestate in aerobic incubation experiments. The objective was to identify the most relevant drivers of C and N mineralisation based on the physicochemical properties of the products. Net organic nitrogen mineralisation of digestates (N-min,N-net) was on average 30%, although the range was relatively wide, with digestate from pig manure (39%) reaching double the value of digestate from sewage sludge (21%). The total carbon to total nitrogen (TC:TN) (r = -0.83, p < 0.05) and ammonium nitrogen to total nitrogen (NH4+-N:TN) (r = 0.83, p < 0.05) ratios of the products were strongly correlated with N-min,N-net, adequately mirroring the expected fertilising potential of the products. The digestates had C sequestration values between 50 and 81% of applied total organic carbon (TOC), showcasing their potential to contribute to C build-up in agricultural soils. The carbon use efficiency of the amended soils was negatively correlated with dissolved organic carbon (DOC) (r = -0.75, p < 0.05) suggesting that catabolic activities were promoted proportionately to the DOC present in these products. Ratios of DOC:TOC (r = -0.88, p < 0.01) and TC:TN (r = 0.92, p < 0.01) were reliable predictors of the fraction of C that would remain one year after its incorporation and thus could be used as simple quality parameters to denote the C sequestration potential of digestates prior to their use in the field.}}, articleno = {{456}}, author = {{Reuland, Gregory and Sigurnjak, Ivona and Dekker, Harmen and Sleutel, Steven and Meers, Erik}}, issn = {{2073-4395}}, journal = {{AGRONOMY-BASEL}}, keywords = {{Agronomy and Crop Science,digestate,carbon,nitrogen,manure,carbon use efficiency,carbon sequestration,nitrogen mineralisation,nitrification,Nitrates Directive,DISSOLVED ORGANIC-CARBON,ANAEROBIC-DIGESTION,SHORT-TERM,MICROBIAL COMMUNITY,PHYSICAL PROTECTION,N-MINERALIZATION,PIG SLURRY,SOIL C,EMISSIONS,COMPOST}}, language = {{eng}}, number = {{2}}, pages = {{21}}, title = {{Assessment of the carbon and nitrogen mineralisation of digestates elaborated from distinct feedstock profiles}}, url = {{http://doi.org/10.3390/agronomy12020456}}, volume = {{12}}, year = {{2022}}, }
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