Home About Browse Search
Svenska


Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter

Meurer, Katharina and Chenu, Claire and Coucheney, Elsa and Herrmann, Anke and Keller, Thomas and Kätterer, Thomas and Nimblad Svensson, David and Jarvis, Nicholas (2020). Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter. Biogeosciences. 17 , 5025-5042
[Journal article]

[img] PDF
352kB

Abstract

Models of soil organic carbon (SOC) storage and turnover can be useful tools to analyse the effects of soil and crop management practices and climate change on soil organic carbon stocks. The aggregated structure of soil is known to protect SOC from decomposition and, thus, influence the potential for long-term sequestration. In turn, the turnover and storage of SOC affects soil aggregation, physical and hydraulic properties and the productive capacity of soil. These two-way interactions have not yet been explicitly considered in modelling approaches. In this study, we present and describe a new model of the dynamic feedbacks between soil organic matter (SOM) storage and soil physical properties (porosity, pore size distribution, bulk density and layer thickness). A sensitivity analysis was first performed to understand the behaviour of the model. The identifiability of model parameters was then investigated by calibrating the model against a synthetic data set. This analysis revealed that it would not be possible to unequivocally estimate all of the model parameters from the kind of data usually available in field trials. Based on this information, the model was tested against measurements of bulk density, SOC concentration and limited data on soil water retention and soil surface elevation made during 63 years in a field trial located near Uppsala (Sweden) in three treatments with different organic matter (OM) inputs (bare fallow, animal and green manure). The model was able to accurately reproduce the changes in SOC, soil bulk density and surface elevation observed in the field as well as soil water retention curves measured at the end of the experimental period in 2019 in two of the treatments. Treatment-specific variations in SOC dynamics caused by differences in OM input quality could be simulated very well by modifying the value for the OM retention coefficient epsilon (0.37 for animal manure and 0.14 for green manure). The model approach presented here may prove useful for management purposes, for example, in an analysis of carbon sequestration or soil degradation under land use and climate change.

Authors/Creators:Meurer, Katharina and Chenu, Claire and Coucheney, Elsa and Herrmann, Anke and Keller, Thomas and Kätterer, Thomas and Nimblad Svensson, David and Jarvis, Nicholas
Title:Modelling dynamic interactions between soil structure and the storage and turnover of soil organic matter
Series Name/Journal:Biogeosciences
Year of publishing :2020
Volume:17
Page range:5025-5042
Number of Pages:18
ISSN:1726-4170
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Soil Science
URN:NBN:urn:nbn:se:slu:epsilon-p-108844
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108844
Additional ID:
Type of IDID
DOI10.5194/bg-17-5025-2020
Web of Science (WoS)000583847000002
ID Code:19125
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment

(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:08 Dec 2020 10:23
Metadata Last Modified:21 Jan 2021 10:15

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits