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 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.
Lashermes
G
G
INRA, UMR1091 Environnement et Grandes Cultures, F-78850 Thiverval-Grignon, France.
Nicolardot
B
B
Parnaudeau
V
V
Thuriès
L
L
Chaussod
R
R
Guillotin
M L
ML
Linères
M
M
Mary
B
B
Metzger
L
L
Morvan
T
T
Tricaud
A
A
Villette
C
C
Houot
S
S
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*
D008903:Minerals; D009930:Organic Chemicals; D009584:Nitrogen