Spatial variations of aggregate stability in relation to sesquioxides for zonal soils, South-central China

Wu, Xi; Cai, Chang; Wang, Junguang; Wei, Yujie; Wang, Shuo

doi:10.1016/j.still.2015.11.005

Cited by 58 publications

(22 citation statements)

References 44 publications

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“… Mizuta et al (2015) found that although polysaccharides such as starch and cellulose accelerated soil aggregation, the decomposition of these amendments influenced only aggregation, not aggregate stabilization. It has also been reported that the role of organic matter (aggregating or disaggregating) depended on its chemical composition and presence of other binding agents ( Goldberg et al, 1990 , Mizuta et al, 2015 , Wu et al, 2016 ). The conventional hand-hoe tillage system used in this study is what is practiced by most farmers in the area and it may compromise short-term build-up of soil aggregates.…”

Section: Discussionmentioning

confidence: 98%

Aggregate size distribution in a biochar-amended tropical Ultisol under conventional hand-hoe tillage

Fungo

Lehmann

Kalbitz

et al. 2017

Soil and Tillage Research

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Section: Discussionmentioning

confidence: 98%

Aggregate size distribution in a biochar-amended tropical Ultisol under conventional hand-hoe tillage

Fungo

Lehmann

Kalbitz

et al. 2017

Soil and Tillage Research

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“…Zhang, Yang, & Zepp, 2004). For most soil types, soil horizons differ in their properties due to pedogenic differentiation, such as aggregate stability, porosity, and organic matter (Wu, Cai, Wang, Wei, & Wang, 2016). The alteration of soil properties during land degradation would in turn affect soil erodibility (Podwojewski et al, 2011;Rejman et al, 1998).…”

mentioning

confidence: 99%

RUSLE erodibility of heavy‐textured soils as affected by soil type, erosional degradation, and rainfall intensity: A field simulation

Wei

Wang

et al. 2018

Land Degrad Dev

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Soil erosion is a serious problem world‐wide for the environment or humankind, exacerbating land degradation. However, little systematic knowledge is available about the erodibility of various types of soils at different erosional degradation levels, especially at the field scale. In this research, the spatiotemporal variations of the erodibility for 5 soil types (calcic luvisol, ferric luvisol, plinthic alisol, plinthic acrisol, and acric ferralsol) from temperate to tropical climate were investigated with field rainfall simulation experiments on prewetted bare fallow heavy‐textured soils (silty clay loam, silty clay, and clay) derived separately from loess deposits, quaternary red clays, and basalt. The experiments were performed in 3 erosion classes (noneroded, moderately eroded, and very severely eroded) and at 2 rainfall intensities (45 and 90 mm hr−1). Soil erodibility was represented by the K factor of the Revised Universal Soil Loss Equation. Soil erodibility was the lowest for the ferralsols among all the soil types and was significantly lower in the very severe than in the no or moderate erosion classes. Soil erodibility tended to be larger at the high than at the low rainfall intensity (p < .05) except for the very severely eroded luvisols, and their difference between rainfall intensities in the erodibility varied with rainfall duration. Soil erodibility could be well predicted by the combination of illite, dry aggregate stability, and amorphous aluminium oxides (adjusted R2 = .51, p < .001), and its temporal variations were significantly related with particle density, 1.4‐nm intergrade mineral, and capillary porosity (p < .05). Furthermore, soil properties selected to account for soil erodibility varied with rainfall intensity. The integrated data indicated that soil erodibility was mainly influenced by clay minerals at the region scale and soil degradation degree at the pedon scale.

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“…For Alisol and Acrisol, soil mechanical strength increased with increased erosion severity owning to the increased bulk density or soil compactness (Sharma et al, ; Wu et al, ), which resulted in an increasing steady state infiltration rate with erosion severity irrespective of rainfall intensities. Compared with the noneroded/very severely eroded lands, soils on the moderately eroded lands were in medium structural stability and were crusted easily and fast under high intensity rainfall but hardly and slowly under low intensity rainfall (Figure e,f), which resulted in the negative impact of rainfall intensity on soil infiltration.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the impact of erosion-induced land degradation on soil infiltration by water and its extent was dependent of soil type and rainfall intensity. and sesquioxides by cementing effects (Sharma, Gupta, & Rawls, 1991;Wu, Cai, Wang, Wei, & Wang, 2016) but decreased by sand particles (Le Bissonnais, 1996;Mchunu et al, 2011). Swelling clay minerals (illite and vermiculite) and exchangeable cations contributed to particle dispersion by weakening the bonds between particles under the impact of hydration (Reichert, Norton, Favaretto, Huang, & Blume, 2009;Wakindiki & Ben-Hur, 2002).…”

Section: Impact Of Erosion-induced Land Degradation On Rainfall Infmentioning

confidence: 99%

Impact of erosion‐induced land degradation on rainfall infiltration in different types of soils under field simulation

Wei

Cai

et al. 2019

Land Degrad Dev

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Land degradation induced by water erosion is a worldwide problem for sustainable agriculture. Erosion results in the alteration of soil properties to a varying extent that depends on soil type. However, limited attempts have been made to assess the impact of erosion‐induced land degradation on soil infiltration on a wide range of soil types. Herein, field rainfall simulation experiments were performed on prewetted bare heavy‐textured soils at three erosion degrees (no, moderate, and very severe) for five types of soils (Calcic Luvisol, Ferric Luvisol, Plinthic Alisol, Plinthic Acrisol, and Acric Ferralsol). Soil infiltration rate was determined at two rainfall intensities (45 and 90 mm hr−1) and 3‐min intervals for 60‐min runoff duration on microplots (3 m long × 0.8 m wide, 10° slope). At the low rainfall intensity, the impact of erosion‐induced land degradation on rainfall infiltration increased from Calcic Luvisol to Plinthic Acrisol, and the steady state infiltration rate (fc) was well characterized by bulk density and 1.4‐nm intergrade minerals (Adj‐R2 = 0.79, p < 0.001). At the high rainfall intensity, fc was negatively related with illite solely (Adj‐R2 = 0.25, p < .05) and generally increased with an increase of erosion severity; the impact of erosion‐induced land degradation on fc was magnified for Calcic Luvisol and Acric Ferralsol but lessened for other soil types. Collectively, the impact of erosion‐induced land degradation generally increased with increased soil structural stability at the low rainfall intensity and was determined by the interaction between soil structure and rainfall at the high rainfall intensity.

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Spatial variations of aggregate stability in relation to sesquioxides for zonal soils, South-central China

Cited by 58 publications

References 44 publications

Aggregate size distribution in a biochar-amended tropical Ultisol under conventional hand-hoe tillage

Aggregate size distribution in a biochar-amended tropical Ultisol under conventional hand-hoe tillage

RUSLE erodibility of heavy‐textured soils as affected by soil type, erosional degradation, and rainfall intensity: A field simulation

Impact of erosion‐induced land degradation on rainfall infiltration in different types of soils under field simulation

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