0000000000563019
AUTHOR
Monique Lineres
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
Apport de matières organiques exogènes en agriculture: indicateur de potentialité de stockage de carbone dans les sols et définition de classes de disponibilité d’azote
CT3; absent
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…