Article (Scientific journals)
Factors governing soil water repellency under tillage management: The role of pore structure and hydrophobic substances
Li, Shengping; Lu, Jinjing; Liang, G. et al.
2021In Land Degradation and Development, 32 (2), p. 1046-1059
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Keywords :
X-ray computed tomography; Agricultural robots; Agriculture; Computerized tomography; Ethanol; Hydrophobicity; Organic carbon; Pore structure; Porosity; Soil moisture; Carbon sequestration; Conservation agricultures; Conventional tillage; Microbial biomass carbon; Redundancy analysis; Soil organic carbon; Soil water repellency; Tillage management; Soil conservation; X-ray analysis
Abstract :
[en] Soil water repellency (SWR) has significant effects on soil degradation by changing some soil processes (e.g., carbon sequestration and soil erosion). Understanding the influence factors of SWR under conservation agriculture are playing a vital role in the sustainable development for improving soil quality. However, how soil pore structure influence on SWR remains unclear. We aim to assess the impact of hydrophobic substances and pore structure on SWR. Here we conducted two long-term experimental fields with three treatments: conventional tillage (CT), reduced tillage (RT), and no-tillage (NT). X-ray tomography and the sorptivity method were used to measure soil pore structure and SWR, respectively. We found that soil organic carbon (SOC) and microbial biomass carbon (MBC) were higher in RT and NT treatments than in CT. MBC had significant influences on soil water sorptivity (Sw) and water repellency index (RI; p < 0.001), whereas SOC had no influence on Sw (p > 0.05). MBC also showed a closer relationship with SWR than SOC in redundancy analysis. The RT and NT increased the porosity of 55–165 μm that had a positive relationship with ethanol sorptivity and RI (p < 0.05). Ethanol sorptivity increased with an increase in soil pore porosity and connectivity under RT and NT treatments. However, increasing the pore surface area could decrease Sw due to enhance contact area between hydrophobic substances and soil water. Overall, the RT and NT treatments increased the water repellency index, which was a result of the interactions between pore structure and hydrophobic substances. © 2020 John Wiley & Sons, Ltd.
Research center :
TERRA Research Centre - TERRA
Disciplines :
Engineering, computing & technology: Multidisciplinary, general & others
Agriculture & agronomy
Author, co-author :
Li, Shengping ;  Université de Liège - ULiège > TERRA
Lu, Jinjing  ;  Université de Liège - ULiège > TERRA Research Centre
Liang, G.;  Department of Biology, Utah State University, Logan, UT, United States
Wu, X.;  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Zhang, Mengni ;  Université de Liège - ULiège > TERRA Research Centre
Plougonven, Erwan  ;  Université de Liège - ULiège > Department of Chemical Engineering > PEPs - Products, Environment, and Processes
Wang, Y.;  Institute of Water Saving Agriculture in Arid Regions of China (IWSA), Northwest A & F University, Yangling, China
Gao, L.;  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Abdelrhman, A. A.;  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Song, X.;  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Liu, X.;  Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
Degré, Aurore  ;  Université de Liège - ULiège > Département GxABT > Echanges Eau - Sol - Plantes
Language :
English
Title :
Factors governing soil water repellency under tillage management: The role of pore structure and hydrophobic substances
Publication date :
2021
Journal title :
Land Degradation and Development
ISSN :
1085-3278
eISSN :
1099-145X
Publisher :
John Wiley and Sons Ltd
Volume :
32
Issue :
2
Pages :
1046-1059
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
National Key Research and Development Program of China. Grant Number: 2018YFE0112300; National Key Research Development Program of China. Grant Number: 2018YFD0200408 National Science and Technology Project of China. Grant Number: 2015BAD22B03
Funders :
National Key Research and Development Program of China, NKRDPC: 2018YFD0200408, 2018YFE0112300; National Science and Technology Planning Project; Wuhan Science and Technology Project: 2015BAD22B03
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