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.
| Main Authors: | , , , , , , , , , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | P35 - Fertilité du sol, P33 - Chimie et physique du sol, F04 - Fertilisation, teneur en azote, disponibilité d'élément nutritif, matière organique du sol, amendement organique, minéralisation, cycle de l'azote, classification, composition chimique, fertilité du sol, http://aims.fao.org/aos/agrovoc/c_5193, http://aims.fao.org/aos/agrovoc/c_5268, http://aims.fao.org/aos/agrovoc/c_35657, http://aims.fao.org/aos/agrovoc/c_12965, http://aims.fao.org/aos/agrovoc/c_15999, http://aims.fao.org/aos/agrovoc/c_27938, http://aims.fao.org/aos/agrovoc/c_1653, http://aims.fao.org/aos/agrovoc/c_1794, http://aims.fao.org/aos/agrovoc/c_7170, |
| Online Access: | http://agritrop.cirad.fr/550945/ http://agritrop.cirad.fr/550945/1/document_550945.pdf |
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