Erosion-reducing effects of plant roots during concentrated flow under contrasting textured soils

Hao, Hao-xin; Qin, Jia-hui; Sun, Zhao-xiang; Guo, Zhonglu; Wang, Junguang

doi:10.1016/j.catena.2021.105378

Cited by 39 publications

(22 citation statements)

References 52 publications

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“…Similarly, precipitation is the key factor for carbon sequestration [59], soil conservation [60], and water yield [61]. Soil properties affect plant growth [62], soil erosion [63], and hydrologic processes [64], and they are also important factors for these three ESs. In this study, the effects of land use on ESs trade-offs were analyzed in three precipitation regions, and other factors, such as soil, were not introduced, which would limit the results and corresponding management recommendations.…”

Section: The Limitation Of the Methods And Resultsmentioning

confidence: 99%

The Effects of Land-Use Change/Conversion on Trade-Offs of Ecosystem Services in Three Precipitation Zones

2021

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Revealing the spatial differentiation of ecosystem service (ES) trade-offs and their responses to land-use change along precipitation gradients are important issues in the Loess Plateau of China. We selected three watersheds called Dianshi (300 mm < MAP (mean annual precipitation) < 400 mm), Ansai (400 mm < MAP < 500 mm), and Linzhen (500 mm < MAP < 600 mm). A new ES trade-off quantification index was proposed, and quantile regression, piecewise linear regression, and redundancy analysis were used. The results were as follows. (1) Carbon sequestration (TC) and soil conservation (SEC) increased, but water yield (WY) decreased in the three watersheds from 2000 to 2018. (2) The effect of forests on trade-offs was positive in three watersheds, the main effect of shrubs was also positive, but the negative effect appeared in the TC-WY trade-off in Ansai. Grassland exacerbated trade-offs in Dianshi, whereas it reduced trade-offs in Ansai and Linzhen. These effects exhibited respective trends with the quantile in the three watersheds. (3) There were threshold values that trade-offs responded to land-use changes, and we could design land-use conversion types to balance ESs. In general, the water consumption of grass cannot be ignored in Dianshi; shrubs and grass are suitable vegetation types, and forests need to be restricted in Ansai; more forests and shrubs can be supported in Linzen due to higher precipitation, but the current proportions of forests and shrubs are too high. Our research contributes to a better understanding of the response mechanisms of ES trade-offs to land-use changes.

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Section: The Limitation Of the Methods And Resultsmentioning

confidence: 99%

The Effects of Land-Use Change/Conversion on Trade-Offs of Ecosystem Services in Three Precipitation Zones

2021

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“…More recently, Li et al ( 2021 ) also showed that a dichotomous branching pattern is beneficial to cold resistance. Yet, work by Hao et al ( 2021 ) failed to find soil texture influencing the topological index. In particular, compared with Hao et al's ( 2021 ) experiment, their extracted SBD and SP values are similar to those in our study, and we found that soil texture was significantly and positively correlated with the topological index.…”

Section: Discussionmentioning

confidence: 98%

“…Yet, work by Hao et al ( 2021 ) failed to find soil texture influencing the topological index. In particular, compared with Hao et al's ( 2021 ) experiment, their extracted SBD and SP values are similar to those in our study, and we found that soil texture was significantly and positively correlated with the topological index. In general, plants' survival strategies lean toward increasing the number of internal links or reducing the number of external links when adapting to the soil nutrient-poor soil environments.…”

Section: Discussionmentioning

confidence: 98%

“…The TI indirectly describes the uptake efficiency of roots for water and nutrients, for which Fitter ( 1994 ) proposed two extreme branching patterns, namely, the dichotomous branching pattern ( TI = 1) to adapt to nutrient-poor soils and the herringbone branching pattern for the nutrient-rich soils ( TI = 0.5). However, due to the influences from plant growth characteristics, soil fertilities, and soil compaction, the TI values always range from 0.5 to 1 (Fitter, 1994 ; Magalhães and Seifert, 2015 ; Li et al, 2020 , 2021 ; Hao et al, 2021 ). In our study, the root system of C. funebris branching pattern changed from a herringbone branching pattern (having a small number of internal links, many external links, many secondary branches, and internal overlaps) to a dichotomous branching pattern exhibiting more internal links, fewer external links, fewer secondary branches, less overlap, and weaker internal competition ( Figures 3A–C ).…”

Section: Discussionmentioning

confidence: 99%

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Response Strategies of Root System Architecture to Soil Environment: A Case Study of Single-Species Cupressus funebris Plantations

Luo

Wang

et al. 2022

Front. Plant Sci.

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The root system architecture (RSA), being a key characteristic of the root economic spectrum, describes the spatial arrangement and positioning of roots that determines the plant's exploration of water and nutrients in the soil. Still, it remains poorly understood how the RSA of woody plants responds to the demand for water and nutrients in different soil environments and how the uptake of these resources is optimized. Here we selected single-species plantations of Cupressus funebris and determined their topological index (TI), revised topological index (qa and qb), root link length (RLL), root branching rate (Rb and Ri:Ri+1), and in situ soil physicochemical properties to assess which root foraging strategies adopt in different soil environments among Guang'an City (GA), Suining City (SN), Mianyang City (MY), and Deyang City (DY) in China. We also tested the potential effects of different nutrients upon RSA according to its plastic phenotype. Principal component analysis (PCA) showed that levels of soil nutrients were the highest at DY, followed by MY and SN, and lower at GA. A dichotomous branching pattern was observed for GA, SN, and MY, but a herringbone branching pattern for DY. The RLL was ranked as GA, > SN, > MY > DY. The Rb of GA, SN, and MY was significantly lower than that of DY (p < 0.05). Among the different city regions, values of R1/R2 were the largest in different regions and those of R4/R5 the smallest. The cross-sectional area of the root system did not differ between any two connected branch orders. The TI, qa, and RLL were significantly and negatively correlated with soil's water content, porosity, total nitrogen, total potassium, available nitrogen, and available phosphorus (p < 0.05), whereas they all had significant, positive relationships with soil temperature (p < 0.05). The Rb was significantly and positively correlated with total potassium in soil (p < 0.05). Redundancy analysis showed that total potassium was the main factor driving variation in RSA. Our results emphasize that the RSA is capable of corresponding plastic alterations by changing its number of internal or external links and the root link length of fine roots vis-à-vis a heterogeneous environment, thereby optimizing the rates of water capture and space utilization.

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“…With respect to the below-ground roots, which has direct and close contact with the soils, owing to its great contribution to the improvement of soil infiltration , soil shear strength (Hao et al, 2020), and soil structure (Hallett et al, 2009), it was often more pronounced in retarding water erosion, especially for the concentrated flow erosion (Gyssels et al, 2005;Vannoppen et al, 2015). Through analyzing numerous relevant studies, it could be easily found that, over the last several decades, the knowledge of relationship between plant roots and soil erosion has been mostly focused on the root effects on water erosion (Ghidey and Alberts, 1997;Mamo and Bubenzer, 2001;Li et al, 2017;Hao et al, 2021), and the information or direct experiment data concerning the influence of roots on wind erosion are very limited.…”

Section: Introductionmentioning

confidence: 99%

Erosion-reducing potential of Salix psammophila roots in the water–wind crisscrossed erosion region of the Chinese Loess Plateau: A simulated investigation

Zhang

Yu²,

Li³

et al. 2023

Front. Environ. Sci.

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Laboratory-simulated experiments under a one-way wind erosion–rain erosion sequence were conducted to investigate the effect of S. psammophila roots on wind and water erosion processes and quantify its erosion-reducing potential. With the collected soil of sandy loam and planted shrub of S. psammophila, 16 soil boxes including bare and root-permeated soils were arranged in March 2017 and conducted in August 2017. With the wind speeds of 11 and 14 m s−1 and rainfall intensities of 60 and 100 mm h−1, two levels of interaction (11 m s−1 × 60 mm h−1 and 14 m s−1 × 100 mm h−1) were designed. The particle-size composition and sediment transport flux were examined in the former wind tunnel experiments, and the runoff hydrodynamic parameters and runoff and water erosion rates were determined in the following rainfall tests. The sediment reduction effect by roots (%) was used to quantify the erosion-reducing potential of roots. The results demonstrated that in the former wind tunnel experiments, compared with the bare soils, the root-permeated soils showed a slight coarsening of surface soil and had 18.03% and 35.71% less sediment transport flux at wind speeds of 11 and 14 m s−1, respectively. In the following rainfall tests, S. psammophila roots weakened the hydrodynamic intensity of overland flow and decreased runoff and water erosion rates by 13.34%, 30.70% and 4.44%, 43.72% at rainfall intensities of 60 and 100 mm h−1, respectively. Different from the water erosion process of bare soils, which showed an increased fluctuated trend, the root-permeated soils presented a steady increase in the early stage of rainfall and then a decrease-stable trend at the mid and end of rainfall. In the wind tunnel–rainfall experiments, the sediment reduction effect by Salix psammophila roots showed 24.37% and 39.72% at levels of 11 m s−1 × 60 mm h−1 and 14 m s−1 × 100 mm h−1, respectively. This kind of study may provide more insights into understanding ecological impacts of sandy vegetation construction on the water–wind crisscrossed erosion region of the Chinese Loess Plateau and also sandy land.

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Erosion-reducing effects of plant roots during concentrated flow under contrasting textured soils

Cited by 39 publications

References 52 publications

The Effects of Land-Use Change/Conversion on Trade-Offs of Ecosystem Services in Three Precipitation Zones

The Effects of Land-Use Change/Conversion on Trade-Offs of Ecosystem Services in Three Precipitation Zones

Response Strategies of Root System Architecture to Soil Environment: A Case Study of Single-Species Cupressus funebris Plantations

Erosion-reducing potential of Salix psammophila roots in the water–wind crisscrossed erosion region of the Chinese Loess Plateau: A simulated investigation

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