Author/Authors :
Lashermes، نويسنده , , G. and Nicolardot، نويسنده , , B. and Parnaudeau، نويسنده , , V. and Thuriès، نويسنده , , L. and Chaussod، نويسنده , , R. and Guillotin، نويسنده , , M.L. and Linères، نويسنده , , M. and Mary، نويسنده , , B. and Metzger، نويسنده , , L. and Morvan، نويسنده , , T. and Tricaud، نويسنده , , A. and Villette، نويسنده , , C. and Houot، نويسنده , , S.، نويسنده ,
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.
Keywords :
N mineralization , Biochemical fractionation , typology , hierarchical classification , Exogenous organic matter
