Factors governing soil water repellency under tillage management: The role of pore structure and hydrophobic substances

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/Unit :

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 :

Issue :

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

Available on ORBi :

since 06 January 2022

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