NDLI: OMDY: a new model of organic matter decomposition based on biomolecular content as assessed by $^{13}$C-CPMAS-NMR

Content Provider	Springer Nature Link
Author	Incerti, Guido Bonami, Giulia Gianni, Francesco Cartenì, Fabrizio Spaccini, Riccardo Mazzei, Pierluigi Piccolo, Alessandro Mazzoleni, Stefa
Copyright Year	2016
Abstract	Modelling organic matter decomposition is fundamental to understand biogeochemical cycling in terrestrial ecosystems. Current models use C/N or Lignin/N ratios to describe susceptibility to decomposition, or implement separate C pools decaying with different rates, disregarding biomolecular transformations and interactions and their effect on decomposition dynamics. We present a new process-based model of decomposition including a description of biomolecular dynamics obtained by $^{13}$C-CPMAS NMR spectroscopy.Baseline decay rates for relevant molecular classes and intermolecular protection were calibrated by best fitting of experimental data from leaves of 20 plant species decomposing for 180 days in controlled optimal conditions. The model was validated against field data from leaves of 32 plant species decomposing for 1-year at four sites in Mediterranean ecosystems.Simulations correctly reproduced mass loss data and variations of selected molecular classes both in controlled conditions and in the field, for a wide range of plant molecular composition and environmental conditions.Our innovative approach accurately predicted decomposition of a wide range of litters across different climates. Prediction accuracy emerged from the species-specific partitioning of molecular types and from the representation of intermolecular interactions. Further application should be planned in other ecosystems based on long-term decomposition datasets.
Starting Page	377
Ending Page	394
Page Count	18
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	411
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2016-08-31
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Plant residues Litter Decay rate Molecular quality Intermolecular protection System dynamics Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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OMDY: a new model of organic matter decomposition based on biomolecular content as assessed by 13C-CPMAS-NMR

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OMDY: a new model of organic matter decomposition based on biomolecular content as assessed by 13C-CPMAS-NMR

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OMDY: a new model of organic matter decomposition based on biomolecular content as assessed by $^{13}$C-CPMAS-NMR