Supplement to: Understanding the Impact of Liquid Organic Fertilisation and Associated Application Techniques on N2, N2O and CO2 Fluxes from Agricultural Soils

Datenmeldung nach dem EGovG. Der Datensatz kann auf Anfrage zur Verfügung gestellt werden. Eine Datennutzungsvereinbarung wird abgeschlossen.

The prediction of liquid manure effects on N transformations in soils and the associated N₂O and N₂ fluxes is poor because previous investigations have mostly excluded N₂. The objectives of this study were thus to quantify N₂, N₂O and CO₂ fluxes, the source processes of N₂O, N₂O reduction and the depth distribution of moisture, NO₃^-, NH₄⁺, water-extractable organic carbon concentration and pH in a laboratory incubation study with sandy arable soil using ¹⁵N tracing to quantify N processes and gaseous fluxes. The soil was amended with and without artificial slurry in various manure treatments (control, surface and injected) and incubated for 10 days at varying moisture levels, where the depth distribution of control parameters was determined twice during the experiment. Manure application was found to increase N₂ and N₂O fluxes from denitrification, with the highest fluxes occurring in the wet manure injection treatment (33±32 mg N m-2 d-1 and 36.1±39.1 mg N m^-2 d^-1, respectively), confirming that manure injection under wet conditions enhances denitrification and possibly also N₂O fluxes. This study concluded that the current dataset is suitable as a first step towards improving the capability of biogeochemical models to predict manure application effects, but further studies with more soils and refined experiments are needed.

Citation:

Grosz, B.; Kemmann, B.; Burkart, S.; Petersen, S.O.; Well, R. Understanding the Impact of Liquid Organic Fertilisation and Associated Application Techniques on N₂, N₂O and CO₂ Fluxes from Agricultural Soils. Agriculture2022, 12, 692. https://doi.org/10.3390/agriculture12050692