Fractal root systems of <i>Elymus nutans</i> under different density conditions in Gahai Wetland

Xueping, 李雪萍 Li; Chengzhang, 赵成章 Zhao; Yue, 任悦 Ren; Jing, 张晶 Zhang; Lei, 雷蕾 Lei

doi:10.5846/stxb201701200172

Cited by 3 publications

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“…When plants encounter competition, they usually prioritize the distribution of biomass to organs that are inhibited from receiving adequate resources 34 . Further, when plants are constrained by density, they usually devote more biomass to aboveground growth and reduce biomass input for root growth to avoid shading from neighboring plants and obtain more light 35 . When resources allocated to underground components are limited, root systems undergo "intensive" construction modes, where taproot growth is inhibited and the spatial distribution of roots is decreased to reduce resource input used for root support and transport 36 .…”

Section: Discussionmentioning

confidence: 99%

The effect of Elymus nutans sowing density on soil reinforcement and slope stabilization properties of vegetation–concrete structures

Tan

Huang

Xiong

et al. 2020

Sci Rep

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Elymus nutans is an herbaceous plant that can be used to restore degraded alpine and subalpine ecosystems. Here, we evaluated how sowing density affects soil reinforcement and slope stabilization properties of vegetation–concrete structures. To investigate the optimal sowing density of E. nutans in vegetation–concrete applications for slope protection, six experimental treatments were established with different plant densities: control, I (1100 seeds/m2), II (2200 seeds/m2), III (3300 seeds/m2), IV (4400 seeds/m2), and V (5500 seeds/m2). Several parameters of plant growth in addition to soil reinforcement and slope stabilization properties were measured in each treatment, as well as the associations among parameters. As density increased, aboveground biomass continually increased, and plant heights, root surface areas, root lengths, and underground biomass all first increased and then decreased. In contrast, tiller numbers and the average root diameter gradually decreased with increasing density. Increased density also resulted in increased maximum water interception levels by aboveground stems and leaves. The maximum water interception by the aboveground stems and leaves was 41.75% greater in the highest density treatment (V) compared to the lowest density treatment (I). However, the enhancement of erosion resistance and soil shear strength first increased and then decreased as density increased, with maximal values observed in the medium-high density treatment (IV). Sowing density was highly correlated with aboveground biomass, plant heights, tiller numbers, and the maximum level of water interception by stems and leaves. Thus, sowing density directly influenced soil reinforcement and slope stabilization properties of aboveground plant components. However, density was not significantly correlated with belowground biomass, root lengths, root surface areas, the enhancement of erosion resistance, and soil shear strengths. Therefore, sowing density indirectly influenced soil reinforcement and slope stabilization of belowground plant components. Following from these results, we suggest that the optimal sowing density of E. nutans is approximately 4400 plants/m2 in their application within vegetation–concrete structures used for slope protection.

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Section: Discussionmentioning

confidence: 99%

The effect of Elymus nutans sowing density on soil reinforcement and slope stabilization properties of vegetation–concrete structures

Tan

Huang

Xiong

et al. 2020

Sci Rep

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show abstract

“…The FA of roots is closely related to the distribution density of roots in the soil, the expansion range and the resource competition ability (Yang et al, 2009). The larger the FA, the higher the degree of taproot development, the larger the root distribution range, that is, the plant has stronger support, transport system and space occupation ability (Li et al, 2018;Ren et al, 2020). The relationship between FD and FA can re ect the plasticity and carbon consumption characteristics of plant root architecture to a large extent (Fitter et al, 2006, Song et al, 2015.…”

Section: Introductionmentioning

confidence: 99%

Fractal Analysis of Root Architecture Responses of Saussurea Salsa to Different Habitats in Sugan Lake Wetland on the Northern Margin of Qinghai-Tibet Plateau

Zhao

Wen

et al. 2021

Preprint

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Aims The fractal structure is an important root architecture characteristic, which can reflect the plasticity mechanism and carbon consumption characteristics of root architecture in heterogeneous habitats. However, there are few studies on the root architecture of inland salt marsh plants from the perspective of fractal geometry. Methods This study according to the difference of the habitat conditions, setting plot I (the near water area, distance from the lakeshore, 50–200 m), plot II (the middle water area, distance from the lakeshore, 300–500 m), plot III (the distance water area, distance from the lakeshore, 600–800 m) 3 test sample. The Saussurea salsa as the research object, the root geometric morphology traits and the root fractal structure of Saussurea salsa in the Sugan Lake wetland was studied in response to heterogeneous habitats. Results The results showed that there was a highly significant negative correlation (p < 0.01) between FD and FA of Saussurea salsa at plot I and plot III, meanwhile, there appeared a less significant negative correlation (p < 0.05) between FD and FA at plot II. Conclusions With the habitat changed from plot I to plot III, the Saussurea salsa tended to form an “intensive” root architecture with high fractal dimension (FD) and low fractal abundance (FA) in plot I. “Diffusive” root architecture with low FD and high FA tended to form in plot III. The root of Saussurea salsa had less branch and more inclined to increasing the soil volume of root expansion in the far water area.

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Fractal analysis of root architecture responses of Saussurea salsa to a gradient of flooding intensity and salinity

et al. 2022

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Fractal root systems of Elymus nutans under different density conditions in Gahai Wetland

Cited by 3 publications

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The effect of Elymus nutans sowing density on soil reinforcement and slope stabilization properties of vegetation–concrete structures

The effect of Elymus nutans sowing density on soil reinforcement and slope stabilization properties of vegetation–concrete structures

Fractal Analysis of Root Architecture Responses of Saussurea Salsa to Different Habitats in Sugan Lake Wetland on the Northern Margin of Qinghai-Tibet Plateau

Fractal analysis of root architecture responses of Saussurea salsa to a gradient of flooding intensity and salinity

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