Relative contribution of root physical enlacing and biochemistrical exudates to soil erosion resistance in the Loess soil

Li, Qiang; Liu, Guobin; Zheng, Z. P.; Tuo, Dengfeng; Bai, Ru-ru; Qiao, Fangfang

doi:10.1016/j.catena.2017.01.037

Cited by 76 publications

(44 citation statements)

References 14 publications

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“…This study clearly showed that the nine restored types at gully heads had lower Dr than slope cropland (Figure ), which is commonly regarded as a result of fundamental changes in soil properties such as increased soil consolidation, WSA stability, soil permeability, soil organic matter and decreased SDR (De Baets, et al ., ; Li et al ., , ). Pearson correlation and regression analysis showed that Dr was negatively correlated with SBD ( P < 0.01, Table ).…”

Section: Resultsmentioning

confidence: 89%

“…(). This was mainly attributed to the improvement in root binding and bonding effects during revegetation (Li et al ., ; Wang and Zhang, ). SHC was also significantly related to Dr, although the correlation coefficient was lowest (Table ), and the Dr decreased exponentially with SHC (Figure c).…”

Section: Resultsmentioning

confidence: 99%

“…These positive changes in soil properties (e.g. bulk density, organic matter, cohesion, soil disintegration rate and soil aggregate) induced by root systems have been proven to have significant and positive effects on soil resistance to flow erosion (Li et al ., , ; Wang and Zhang, ; Wang et al ., , ).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the change in soil resistance to flow erosion is also closely related to changes in soil properties induced by vegetation restoration. During vegetation restoration, roots gradually embed in the soil body and form a soil–root matrix that contributes additional shear strength to the soil body (Li et al ., ; Wang and Zhang, ). Root growth also produces some root exudates (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Impacts of different vegetation restoration options on gully head soil resistance and soil erosion in loess tablelands

Guo

Wang

et al. 2020

Earth Surf Processes Landf

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Vegetation restoration is identified as an effective approach to control soil erosion and affects soil detachment and resistance to concentrated flow on the Loess Plateau. However, the effects of vegetation restoration at gully heads in loess‐tableland remains unclear. This study was performed to investigate the effects of nine vegetation restoration types at gully heads on soil detachment rate (Dr) and soil resistance to concentrated flow (i.e. soil erodibility, Kr and critical shear stress, τc). Undisturbed soil samples were collected from nine vegetation‐restored lands and one slope cropland (as the control) and were subjected to a hydraulic flume to obtain Dr values of gully heads under six inflow discharges (0.5–3.5 L s‐1). The results showed that the Dr values of nine revegetated gully heads were 77.11% to 95.81% less than that of slope cropland, and the grassland dominated by Cleistogenes caespitosa and the shrubland dominated by Hippophae rhamnoides had a relatively greater decrease in Dr than those of other seven restoration types. The Dr value of nine revegetated gully heads could be better simulated by stream power than by flow velocity and shear stress and was also significantly affected by soil disintegration rate (positively), soil bulk density, saturated hydraulic conductivity, organic matter content, and water‐stable aggregate stability (negatively). Additionally, roots with diameters of 0 to 0.5 mm showed a greater effect on Dr than those with larger diameters. Compared to cropland, the nine restored types reduced Kr by 76.26% to 94.26% and improved τc by 1.51 to 4.68 times. The decrease in Kr and the increase in τc were significantly affected by organic matter content, water‐stable aggregate, mean weight diameter of aggregate and root mass density. The combination of grass species (Cleistogenes caespitosa) and shrub (Hippophae rhamnoides) could be considered the best vegetation restoration types for improving soil resistance of gully heads to concentrated flow. © 2019 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impacts of different vegetation restoration options on gully head soil resistance and soil erosion in loess tablelands

Guo

Wang

et al. 2020

Earth Surf Processes Landf

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“…Li et al . () reported that the mechanical soil binding effect was twice that of the biochemical effect.…”

Section: Needs For Improved Understanding Of Natural and Anthropogenimentioning

confidence: 99%

Soil erosion in the Anthropocene: Research needs

Poesen

2017

Earth Surf Processes Landf

517

272

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Soil erosion is a geomorphological and, at the same time, a land degradation process that may cause environmental and property damage, loss of livelihoods and services as well as social and economic disruption. Erosion not only lowers soil quality on-site, but causes also significant sediment-related problems off-site. Given the large number of research papers on this topic, one might therefore conclude that we know now almost everything about soil erosion and its control so that little new knowledge can be added. This conclusion can be refuted by pointing to some major research gaps. There is a need for more research attention to (1) improved understanding of both natural and anthropogenic soil erosion processes and their interactions, (2) scaling up soil erosion processes and rates in space and time, and (3) innovative techniques and strategies to prevent soil erosion or reduce erosion rates. This is illustrated with various case studies from around the world. If future research addresses these research gaps, we will (1) better understand processes and their interactions operating at a range of spatial and temporal scales, predict their rates as well as their onsite and off-site impacts, which is academically spoken rewarding but also crucial for better targeting erosion control measures, and (2) we will be in a better position to select the most appropriate and effective soil erosion control techniques and strategies which are highly necessary for a sustainable use of soils in the Anthropocene.

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Temporal variation of soil erosion resistance on sloping farmland during the growth stages of maize (Zea mays L.)

Zheng

et al. 2021

Hydrological Processes

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Maize growth has great effects on soil properties and thus likely induces the changes in soil erosion resistance on sloping farmland. However, temporal variation of soil erosion resistance during the growth stages of maize is still unclear in the mountainous yellow soil area where maize is the dominant crop. In this study, four maize plots (MP) and four bare land plots (CK) were conducted to investigate soil erosion resistance, and multiple indicators of soil erosion resistance were measured including the total soil antiscourability (TAS), mean weight diameter (MWD), soil erodibility K factor and soil shear strength (SH). A comprehensive soil erosion resistance index (CSERI) was employed to quantify the temporal variation of soil erosion resistance during the growth stages of maize (seedling stage, SS; jointing stage, JS; tasselling stage, TS; maturing stage, MS).The results showed that TAS, MWD, SH increased significantly with maize growth and SH decreased when at MS. But K factor decreased significantly over time. CSERI increased significantly during the growth stages of maize and the CSERI of JS, TS, MS increased on average by 74.72, 180.68 and 234.57% than that of SS. Compared to CK, CSERI of MP increased by 49.90, 66.82, 55.60 and 38.61% during the growth stages of maize. The temporal variation of soil erosion resistance was closely related to the changes in maize cover, maize roots and soil organic carbon. The findings demonstrated that it is necessary to consider the temporal variation of soil erosion resistance in the mountainous yellow soil area.

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Relative contribution of root physical enlacing and biochemistrical exudates to soil erosion resistance in the Loess soil

Cited by 76 publications

References 14 publications

Impacts of different vegetation restoration options on gully head soil resistance and soil erosion in loess tablelands

Impacts of different vegetation restoration options on gully head soil resistance and soil erosion in loess tablelands

Soil erosion in the Anthropocene: Research needs

Temporal variation of soil erosion resistance on sloping farmland during the growth stages of maize (Zea mays L.)

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