title: Typology of exogenous organic matters based on chemical and biochemical composition to predict potential nitrogen mineralization.
abstract: 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 mineralization to risk of inducing N immobilization in soil after application. These classes were defined on the basis of EOM organic N content and soluble, cellulose-, and lignin-like fractions. A decision tree based on these variables was constructed in order to easily attribute any EOM to 1 of the 6 classes.
authors.affiliation: INRA, UMR1091 Environnement et Grandes Cultures, F-78850 Thiverval-Grignon, France.
authors.forename: G
authors.initials: G
authors.lastname: Lashermes
authors.forename: B
authors.initials: B
authors.lastname: Nicolardot
authors.forename: V
authors.initials: V
authors.lastname: Parnaudeau
authors.forename: L
authors.initials: L
authors.lastname: Thuriès
authors.forename: R
authors.initials: R
authors.lastname: Chaussod
authors.forename: M L
authors.initials: ML
authors.lastname: Guillotin
authors.forename: M
authors.initials: M
authors.lastname: Linères
authors.forename: B
authors.initials: B
authors.lastname: Mary
authors.forename: L
authors.initials: L
authors.lastname: Metzger
authors.forename: T
authors.initials: T
authors.lastname: Morvan
authors.forename: A
authors.initials: A
authors.lastname: Tricaud
authors.forename: C
authors.initials: C
authors.lastname: Villette
authors.forename: S
authors.initials: S
authors.lastname: Houot
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D008903:Minerals / Q000032:analysis / Q000737:chemistry*; D008956:Models, Chemical; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry*; D009930:Organic Chemicals / Q000032:analysis* / Q000737:chemistry*
chemical_list: D008903:Minerals; D009930:Organic Chemicals; D009584:Nitrogen