caa a22 4500 60551724X CHVBK 20210128100718.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10533-014-0063-2 doi (NATIONALLICENCE)springer-10.1007/s10533-014-0063-2 Is priming effect a significant process for long-term SOC dynamics? Analysis of a 52-years old experiment [Elektronische Daten] [Rémi Cardinael, Thomas Eglin, Bertrand Guenet, Cathy Neill, Sabine Houot, Claire Chenu] Short time scale (~days to year) soil incubation experiments have evidenced that mineralisation rate of soil organic carbon could be increased by higher fresh organic matter (FOM) inputs. This process could affect global soil C stocks but its importance has yet to be assessed at decennial or centennial time-scales. In this study, we analysed soil organic carbon (SOC) data from a 52-years old bare-fallow experiment in Grignon (France) where plots received no organic matter, or only fresh straw or composted straw. Treatments receiving fresh or composted straw showed no significant difference in SOC stocks dynamics over the 52years, suggesting no long-term impact of priming effect. To go further, we evaluated whether soil organic matter (SOM) mineralisation rates differed between plots with no input and plots with FOM inputs, using simple models of SOC dynamics based on the Hénin-Dupuis formalism. Using a model with three SOC pools, we showed that estimated mineralisation rates were 3-4 times slower for the plots with no input, suggesting an important role of priming effect. However, a 4-pools model with first order kinetics could satisfactorily fit all the data using a same set of parameters. Our results did not assess the absence of priming effect on SOC stocks dynamics at decennial timescale, but suggest that priming effect is not necessarily a relevant process to explain long-term SOC dynamics. It would be worthwhile to test our modelling approach on other long-term datasets, in particular from more nitrogen-limited experiments and using other data giving complementary information on mineralisation rates, such as 14C. Springer International Publishing Switzerland, 2015 Compost nationallicence Priming effect nationallicence First-order kinetics models nationallicence Nitrogen nationallicence Bare fallow nationallicence Particle size fractionation nationallicence Cardinael Rémi AgroParisTech, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut Eglin Thomas CNRS, Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ, CE L'Orme des Merisiers, 91191, Gif-Sur-Yvette, France aut Guenet Bertrand CNRS, Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ, CE L'Orme des Merisiers, 91191, Gif-Sur-Yvette, France aut Neill Cathy Université Pierre et Marie Curie, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut Houot Sabine INRA, UMR Environnement et Grandes Cultures, Bâtiment Eger, 78850, Thiverval-Grignon, France aut Chenu Claire AgroParisTech, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut Biogeochemistry Springer International Publishing 123/1-2(2015-03-01), 203-219 0168-2563 123:1-2<203 2015 123 10533 https://doi.org/10.1007/s10533-014-0063-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10533-014-0063-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cardinael Rémi AgroParisTech, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Eglin Thomas CNRS, Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ, CE L'Orme des Merisiers, 91191, Gif-Sur-Yvette, France aut NATIONALLICENCE 700 1- Guenet Bertrand CNRS, Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ, CE L'Orme des Merisiers, 91191, Gif-Sur-Yvette, France aut NATIONALLICENCE 700 1- Neill Cathy Université Pierre et Marie Curie, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Houot Sabine INRA, UMR Environnement et Grandes Cultures, Bâtiment Eger, 78850, Thiverval-Grignon, France aut NATIONALLICENCE 700 1- Chenu Claire AgroParisTech, BIOEMCO Laboratory, UMR UPMC-CNRS-ParisXII-AgroParisTech-IRD-ENS, Bâtiment Eger, 78850, Thiverval-Grignon, France aut NATIONALLICENCE 773 0- Biogeochemistry Springer International Publishing 123/1-2(2015-03-01), 203-219 0168-2563 123:1-2<203 2015 123 10533