Soil anti-scourability enhanced by herbaceous species roots in a reservoir water level fluctuation zone

Xu, Wenxiu; Yang, Le; Bao, Yuhai; Li, Jinlin; Wei, Jie

doi:10.1007/s11629-020-6152-x

Cited by 13 publications

(2 citation statements)

References 85 publications

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“…Aggregate stability decreased significantly with a decrease in water-level elevation. Previous studies documented that topography and existing vegetation would exert an influence on soil erosion in the WLFZ [48,49]. Besides this, due to the short surface exposure time and steep slope in the LI area, soil nutrients will be continuously eroded by waves under suitable soil moisture conditions and cause a faster decomposition rate [50].…”

Section: Discussionmentioning

confidence: 99%

Effects of Water-Level Fluctuation on Soil Aggregates and Aggregate-Associated Organic Carbon in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China

Sun,

Liu,

Tang

et al. 2024

Land

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Water-level fluctuation (WLF) can destroy soil aggregates and induce soil organic carbon (SOC) loss, potentially triggering impacts on the concentration of atmospheric carbon dioxide. However, responses of soil aggregate content and aggregate-associated organic carbon to WLF have not been well studied, especially in the water-level fluctuation zone (WLFZ) of the Three Gorges Reservoir (TGR). Therefore, samples from different elevations (145 m, 155 m and 165 m) in the WLFZ of the TGR were collected for experiments. The wet sieving method was used to divide soil into silt and clay (<0.053 mm), micro-aggregate (0.053–0.25 mm) and macro-aggregate (>0.25 mm). The K2Cr2O7-H2SO4 oxidation method was used to measure total SOC content in different soil aggregates. A modified Walkley and Black method was used to measure labile carbon in different soil aggregates. Results showed that macro-aggregate content substantially decreased, while micro-aggregate content remained stable and silt and clay fraction accumulated with a decrease in water-level elevations. Moreover, total SOC content and labile carbon in macro-aggregate were obviously higher than those in the micro-aggregate and the silt and clay fraction. Macro-aggregate contributed the most to SOC sequestration, while micro-aggregate contributed the least, and the contribution of macro-aggregate increased with a decrease in water-level elevations. We concluded that the macro-aggregate was the most active participant in the SOC sequestration process, and preferentially increasing the macro-aggregate content of the lowest water-level elevation was conducive to an improvement in soil carbon sequestration potential and would mitigate climate change.

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Section: Discussionmentioning

confidence: 99%

Effects of Water-Level Fluctuation on Soil Aggregates and Aggregate-Associated Organic Carbon in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China

Sun,

Liu,

Tang

et al. 2024

Land

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“…With the increase of plant root biomass, the soil anti-scouring resistance of slope increased [37]. The reason for this result was that when the shrub root biomass was small, it was difficult to form a larger network structure, so the root was not easy to enhance the impact anti-scouring resistance effect of the root-soil complex [38]. The biomass can increase the soil fixation capacity, and the fine roots existing in the soil layer can aggregate the soil, increase the soil anti-scouring resistance, and reduce the soil scour caused by surface runoff [39].…”

Section: Relationship Between Soil Anti-scouring Resistance Index And...mentioning

confidence: 99%

Root biomass and root morphological traits of three shrub species: Implications for the soil anti-scouring resistance of the ecological slope

Zhou,

Yan,

et al. 2023

PLoS ONE

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The purpose of this study was to determine which shrub species will enhance soil anti-scouring resistance on an ecological slope. Root traits and soil anti-scouring resistance of three shrubs (Amorpha fruticosa Linn (AFL), Swida alba Opiz (SAO) and Lespedeza bicolor Turcz (LBT)) were measured. Results showed that root biomass and root morphological traits of three shrubs were significantly correlated with the soil anti-scouring resistance index. According to the composition characteristic values, root morphological traits among the three shrubs had a high contribution rate. Under two slopes and two rainfall conditions, when root biomass and root morphological traits (e.g., root length, root volume and root surface area) were identical, AFL had the highest soil anti-scouring resistance index. These results suggested that root biomass and morphological traits of AFL had more significant effects on soil anti-scouring resistance comparing with SAO and LBT. Therefore, in engineering practice, AFL with stronger soil anti-scouring resistance can be selected as slope plants.

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Simulating the land use change effects on non-point source pollution in the Duliujian River Basin

Jia,

Zhang,

Afrane

et al. 2024

Environ Geochem Health

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Soil anti-scourability enhanced by herbaceous species roots in a reservoir water level fluctuation zone

Cited by 13 publications

References 85 publications

Effects of Water-Level Fluctuation on Soil Aggregates and Aggregate-Associated Organic Carbon in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China

Effects of Water-Level Fluctuation on Soil Aggregates and Aggregate-Associated Organic Carbon in the Water-Level Fluctuation Zone of the Three Gorges Reservoir, China

Root biomass and root morphological traits of three shrub species: Implications for the soil anti-scouring resistance of the ecological slope

Simulating the land use change effects on non-point source pollution in the Duliujian River Basin

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