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Field-scale assessm...
Field-scale assessment of direct and indirect effects of soil texture on organic matter mineralization during a dry summer
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- Li, H. (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment,Ghent University,Research Group of Soil Fertility and Nutrient Management, Department of Environment, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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- Françoys, A. (författare)
- Isotope Bioscience Laboratory, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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- Wang, Xiaolin (författare)
- Mälardalens universitet,Framtidens energi
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- Zhang, S. (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,SLU Artdatabanken,Swedish Species Information Centre,SLU Swedish Species Information Center, Swedish University of Agricultural Sciences, Uppsala, 75007, Sweden
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- Mendoza, O. (författare)
- School of Architecture, Civil and Environmental Engineering EPFL, Lausanne, 1015, Switzerland
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- De Neve, S. (författare)
- Research Group of Soil Fertility and Nutrient Management, Department of Environment, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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- Dewitte, K. (författare)
- Department of Plants and Crops, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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- Sleutel, S. (författare)
- Research Group of Soil Fertility and Nutrient Management, Department of Environment, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
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(creator_code:org_t)
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- Elsevier B.V. 2023
- 2023
- Engelska.
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Ingår i: Science of the Total Environment. - : Elsevier B.V.. - 0048-9697 .- 1879-1026. ; 899
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- Soil texture plays a crucial role in organic matter (OM) mineralization through both direct interactions with minerals and indirect effects on soil moisture. Separating these effects could enhance the modelling of soil organic carbon (SOC) dynamics under climate change scenarios. However, the attempts have been limited small-scale experiments. Here, we studied the effects of soil texture on added OM mineralization in loamy sand, loam and silt loam soils in nine agricultural fields in Flanders, Belgium. Soil moisture, temperature, groundwater table depth and the mineralization of 13C-labeled ryegrass were monitored in buried mesocosms for approximately three months during a dry summer. Ryegrass-C mineralization was lowest in the loamy sand (39 ± 7 %) followed by silt loam (48 ± 7 %) and loam (63 ± 5 %) soils, challenging the current clay%-based moderation of C-mineralization rates in soil models. Soil temperature was not influenced by soil texture, whereas soil moisture was indeed dependent on soil texture. It appears that capillarity sustained upward water supply from groundwater to the topsoil in loam and silt loam soils but not in loamy sand soil, although this difference in capillary rise could not fully explain the higher moisture content in loam than that in silt loam soils. Additionally, soil texture only impacted remnant added ryegrass pieces (>500 μm) but not the finer ryegrass-derived SOC (<500 μm), which might point at the important indirect control of texture on OM mineralization during prolonged summer drought. However, these effects are only manifested during drought when no other factors (e.g., groundwater depth or subsurface water flows) exert an overriding impact on the soil water balance. Overall, our findings highlight the need to properly incorporate the indirect effects of soil texture on OM mineralization into soil carbon models to accurately predict soil C stocks under future climate change scenarios.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Markvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Soil Science (hsv//eng)
Nyckelord
- Capillary rise
- Groundwater
- Soil moisture
- Soil organic carbon
- Stable carbon isotope
- Biogeochemistry
- Climate change
- Climate models
- Drought
- Mineralogy
- Organic carbon
- Silt
- Textures
- Water supply
- 'Dry' [
- Climate change scenarios
- Indirect effects
- Loamy sand
- Organic matter mineralization
- Silt loam soils
- Soil textures
- Stable carbon isotopes
- agricultural soil
- experimental study
- mineralization
- organic matter
- silty loam
- soil carbon
- soil organic matter
- soil texture
- stable isotope
- summer
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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