Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1111/sum.12810
Lizenz creative commons licence
Titel (primär) Transfer of carbon incubation parameters to model the SOC and SON dynamics of a field trial with energy crops applying digestates as organic fertilizers
Autor Gasser, S.A.A.; Nielsen, K.; Franko, U.
Quelle Soil Use and Management
Erscheinungsjahr 2023
Department BOSYS
Band/Volume 39
Heft 1
Seite von 342
Seite bis 356
Sprache englisch
Topic T5 Future Landscapes
Keywords soil carbon incubation; modelling carbon and nitrogen dynamics; parameter transfer; long term field experiment; digestates
Abstract

The fertilisation with organic amendments and digestates from biogas plants are increasingly used to increase carbon stock and to improve the soil quality, but little is still known about their long term effects. A common method to analyse organic amendments and their mineralisation are incubation experiments, where amendments get incubated with soil while CO2 release is measured over time. In a previous study carbon models have been applied to model the carbon dynamics of incubation experiments. The derived parameters describing the carbon turnover of the CCB model (CANDY Carbon Balance) are used to simulate the SOC and SON dynamics of a long term field trial. The trial was conducted in Berge (Germany) where organic amendments like slurry, farmyard manure or digestates where systematically applied.

To grant a higher model flexibility, the amounts of crop residues were calculated for roots and stubble separately. Furthermore the mineralisation dynamics of roots and stubble are considered by the model parameters for each crop. The model performance is compared when using the dry matter and carbon content received from the field trial and the incubation experiments, to evaluate the transferability. The results show that the incubation parameters are transferable to the field site, with rRMSE < 10% for the modelled SOC and rRMSE between 10% and 15% for the SON dynamics. This approach can help to analyse long term effects of unexplored and unusual organic fertilisers under field conditions, whereat the model is used to upscale the C dynamics from incubation experiments, considering environmental conditions.

dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=25990
Gasser, S.A.A., Nielsen, K., Franko, U. (2023):
Transfer of carbon incubation parameters to model the SOC and SON dynamics of a field trial with energy crops applying digestates as organic fertilizers
Soil Use Manage. 39 (1), 342 - 356 10.1111/sum.12810