Details zur Publikation |
Kategorie | Textpublikation |
Referenztyp | Zeitschriften |
DOI | 10.1016/j.geoderma.2022.116224 |
Lizenz | |
Titel (primär) | Pore distances of particulate organic matter predict N2O emissions from intact soil at moist conditions |
Autor | Ortega-Ramírez, P.; Pot, V.; Laville, P.; Schlüter, S.; Amor-Quiroz, D.A.; Hadjar, D.; Mazurier, A.; Lacoste, M.; Caurel, C.; Pouteau, V.; Chenu, C.; Basile-Doelsch, I.; Henault, C.; Garnier, P. |
Quelle | Geoderma |
Erscheinungsjahr | 2023 |
Department | BOSYS |
Band/Volume | 429 |
Seite von | art. 116224 |
Sprache | englisch |
Topic | T5 Future Landscapes |
Keywords | Image analysis; X-ray micro CT; Soil; Particulate organic matter |
Abstract |
Denitrification in soils is a very complex phenomenon due to the multiple factors it depends on. Therefore, making accurate predictions has been an elusive task. In this study we measured N2O emissions daily during 7 days from a set of 20 undisturbed small soil cores that were subsequently scanned using X-ray micro-tomography. Macropores, particulate organic matter (POM) and the mineral matrix were detected based on a locally-adaptive segmentation method. We proposed an indicator based on the morphology of the soil micro-structure to predict the N2O emissions. The indicator, IdPOM-air, relies on the hypothesis that more N2O will be emitted when POM is occluded in the soil matrix, i.e. is located at large distances from the next air-filled pore, most likely leading to anoxic conditions, favorable to the production of N2O. We computed IdPOM-air as the average value of the geodesic distances from the surface of every POM to the closest air-filled pore. For each of the 7 days of measurements IdPOM-air showed a linear trend (each day with an r2 > 0.75) with respect to the N2O emissions, indicating that the spatial distributions of the POM and air-filled pores were key factors to determine the N2O emissions in our soil cores. |
dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=26846 |
Ortega-Ramírez, P., Pot, V., Laville, P., Schlüter, S., Amor-Quiroz, D.A., Hadjar, D., Mazurier, A., Lacoste, M., Caurel, C., Pouteau, V., Chenu, C., Basile-Doelsch, I., Henault, C., Garnier, P. (2023): Pore distances of particulate organic matter predict N2O emissions from intact soil at moist conditions Geoderma 429 , art. 116224 10.1016/j.geoderma.2022.116224 |