0000000000563020
AUTHOR
Laure Metzger
Epandage de matières organiques exogènes : indicateur de potentialité de stockage de carbone dans les sols et définition de classes de disponibilité d'azote
National audience
Typology of exogenous organic matters based on chemical and biochemical composition to predict potential nitrogen mineralization
Our aim was to develop a typology predicting potential N availability of exogenous organic matters (EOMs) in soil based on their chemical characteristics. A database of 273 EOMs was constructed including analytical data of biochemical fractionation, organic C and N, and results of N mineralization during incubation of soil–EOM mixtures in controlled conditions. Multiple factor analysis and hierarchical classification were performed to gather EOMs with similar composition and N mineralization behavior. A typology was then defined using composition criteria to predict potential N mineralization. Six classes of EOM potential N mineralization in soil were defined, from high potential N minerali…