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Complex patterns of soil colloid release from yellow soil driven by rainfall-infiltration process at different stages after shallow tillage.

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Title: Complex patterns of soil colloid release from yellow soil driven by rainfall-infiltration process at different stages after shallow tillage.
Authors: Lei, Wen-Juan1,2 (AUTHOR), Zhang, Yun-Zhu2 (AUTHOR), Wu, Dao-Yong3 (AUTHOR), Ren, Dong-xing4 (AUTHOR), Peng, Tao4 (AUTHOR), He, Fan-Min4 (AUTHOR), Zhou, Xiang-Yang2,3 (AUTHOR) xyzhou6@gzu.edu.cn
Source: Plant & Soil. Apr2026, Vol. 521 Issue 1, p889-914. 26p.
Subjects: Tillage, Colloid analysis, Stormwater infiltration, Particle size distribution, Soil particles, Clay soils, Soil degradation, Soil moisture
Abstract: Aims: Yellow soil features high clay content, compactness, pronounced acidity and infertility. Although shallow tillage (ST) mitigates these limitations, the disruption of soil structure increases colloid release, which facilitates the migration of pollutants to the water environment. Hence, this study investigates the dynamic release of colloids and their key affecting factors following ST. Methods: Soil column experiments are conducted at the corn bell-mouth stage under three typical rainfall scenarios: immediate rainfall after tillage, successive heavy rainfall, and heavy rainfall followed by a relative drought period. Effluent colloid concentration, particle size distribution, and hydrochemical properties are measured during simulated infiltration experiments. Statistical differences are analyzed using paired t-tests, and key influencing factors are identified via Principal Component Analysis (PCA). Results: Colloid release exhibits three distinct patterns: linear increase, power-law decrease, and a mixed type, reflecting variations in initial soil properties. ST significantly increased colloid concentrations compared to non-tilled soils, especially after intense rainfall that increased soil moisture and disrupted aggregates. The size of released particles in tilled soil attenuated more rapidly, being larger initially but significantly smaller in later stages than non-tilled controls. PCA revealed two primary drivers of colloid release: hydraulic forces correlated significantly with particle size, and hydrochemical processes more strongly associated with colloid concentration. Conclusions: Overall, shallow tillage induces complex colloid release behaviors governed by coupled hydraulic and hydrochemical interactions. These findings deepen the understanding of colloid dynamics and support environmental risk assessment in yellow soil regions. [ABSTRACT FROM AUTHOR]
Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193391980
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Complex patterns of soil colloid release from yellow soil driven by rainfall-infiltration process at different stages after shallow tillage.
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  Data: <searchLink fieldCode="DE" term="%22Tillage%22">Tillage</searchLink><br /><searchLink fieldCode="DE" term="%22Colloid+analysis%22">Colloid analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Stormwater+infiltration%22">Stormwater infiltration</searchLink><br /><searchLink fieldCode="DE" term="%22Particle+size+distribution%22">Particle size distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+particles%22">Soil particles</searchLink><br /><searchLink fieldCode="DE" term="%22Clay+soils%22">Clay soils</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+degradation%22">Soil degradation</searchLink><br /><searchLink fieldCode="DE" term="%22Soil+moisture%22">Soil moisture</searchLink>
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  Label: Abstract
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  Data: Aims: Yellow soil features high clay content, compactness, pronounced acidity and infertility. Although shallow tillage (ST) mitigates these limitations, the disruption of soil structure increases colloid release, which facilitates the migration of pollutants to the water environment. Hence, this study investigates the dynamic release of colloids and their key affecting factors following ST. Methods: Soil column experiments are conducted at the corn bell-mouth stage under three typical rainfall scenarios: immediate rainfall after tillage, successive heavy rainfall, and heavy rainfall followed by a relative drought period. Effluent colloid concentration, particle size distribution, and hydrochemical properties are measured during simulated infiltration experiments. Statistical differences are analyzed using paired t-tests, and key influencing factors are identified via Principal Component Analysis (PCA). Results: Colloid release exhibits three distinct patterns: linear increase, power-law decrease, and a mixed type, reflecting variations in initial soil properties. ST significantly increased colloid concentrations compared to non-tilled soils, especially after intense rainfall that increased soil moisture and disrupted aggregates. The size of released particles in tilled soil attenuated more rapidly, being larger initially but significantly smaller in later stages than non-tilled controls. PCA revealed two primary drivers of colloid release: hydraulic forces correlated significantly with particle size, and hydrochemical processes more strongly associated with colloid concentration. Conclusions: Overall, shallow tillage induces complex colloid release behaviors governed by coupled hydraulic and hydrochemical interactions. These findings deepen the understanding of colloid dynamics and support environmental risk assessment in yellow soil regions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Plant & Soil is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11104-026-08428-4
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        Text: English
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      – SubjectFull: Stormwater infiltration
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      – SubjectFull: Particle size distribution
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      – SubjectFull: Soil particles
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      – SubjectFull: Clay soils
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              Text: Apr2026
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