The effects of plant density of Melastoma malabathricum on the erosion rate of slope soil at different slope orientations

Halim, Aimee; Osman, Normaniza

doi:10.1016/j.ijsrc.2015.03.003

Cited by 25 publications

(8 citation statements)

References 56 publications

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“…Similarly, but at a much longer time scale and with many more interacting processes contributing, a remarkable increase in soil fertility was achieved in dense compared to sparse Coffea stands (Pavan et al, 1999). Concurrently, plants protect the soil against erosion, and this is better achieved at higher plant density (Halim & Normaniza, 2015). We may thus conclude that dense stands may improve soil fertility, especially at longer time scales (i.e., those relevant to acquisition by future monostands), but more typically deplete soil resources faster at shorter time scales (i.e., those relevant to resource acquisition by contemporary competitors), and these processes vary quantitatively with depth.…”

Section: How Plant Density Shapes the Abiotic Environmentmentioning

confidence: 99%

Dividing the pie: A quantitative review on plant density responses

Postma

Hecht

Hikosaka

et al. 2020

Plant Cell & Environment

108

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Plant population density is an important variable in agronomy and forestry and offers an experimental way to better understand plant-plant competition. We made a meta-analysis of responses of even-aged mono-specific stands to population density by quantifying for 3 stand and 33 individual plant variables in 334 experiments how much both plant biomass and phenotypic traits change with a doubling in density. Increasing density increases standing crop per area, but decreases the mean size of its individuals, mostly through reduced tillering and branching. Among the phenotypic traits, stem diameter is negatively affected, but plant height remains remarkably similar, partly due to an increased stem length-tomass ratio and partly by increased allocation to stems. The reduction in biomass is caused by a lower photosynthetic rate, mainly due to shading of part of the foliage. Total seed mass per plant is also strongly reduced, marginally by lower mass per seed, but mainly because of lower seed numbers. Plants generally have fewer shoot-born roots, but their overall rooting depth seems hardly affected. The phenotypic plasticity responses to high densities correlate strongly with those to low light, and less with those to low nutrients, suggesting that at high density, shading affects plants more than nutrient depletion.

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Section: How Plant Density Shapes the Abiotic Environmentmentioning

confidence: 99%

Dividing the pie: A quantitative review on plant density responses

Postma

Hecht

Hikosaka

et al. 2020

Plant Cell & Environment

108

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“…Because plant density greatly influences belowground plant growth, density also significantly affects belowground plant properties that influence soil reinforcement and slope stabilization [44][45][46] . Halim and Normaniza showed that high planting densities positively affect the alleviation of slope soil erosion rates 14 . In this study, the E. nutans root system in each density treatment greatly increased the erosion resistance and shear strength of vegetation-concrete substrates compared to controls.…”

Section: Discussionmentioning

confidence: 99%

“…The timely restoration of vegetation coverage is necessary for slope protection projects to fully take advantage of the soil reinforcement and slope stabilization functions of plants 13 . Moreover, planting at an appropriate density will aid in increased soil reinforcement and other slope stabilization properties 14 . However, increased plant densities also increase competition, thereby affecting plant growth.…”

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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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“…However, the SFS has the characteristic of spatial flow, which not only generates ecological benefits for local areas but also flows through circulation media such as wind and has an impact on surrounding areas (Halim & Normaniza, 2015; Pierre et al, 2015; H. Song, Zhang, Piao, & Wan, 2016). A large number of studies have shown that the SFS has a significant impact on air quality in downwind areas, resulting in reduced PM10 concentrations and lower incidence of chronic respiratory diseases (Hong, Pan, Kim, Park, & Kim, 2010; Itazawa, Kanatani, Hamazaki, & Inadera, 2020; Mikami et al, 2006; Polly et al, 2007; X. Y. Zhang, Gong, Zhao, Arimoto, & Zhou, 2003).…”

Section: Introductionmentioning

confidence: 99%

Identifying the flow paths and beneficiary ranges of the sand fixation service: A case‐study in Xilingol League, China

Zang

2022

Land Degrad Dev

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The sand fixation service (SFS) is a function of vegetation ecosystems whereby sand is restrained and stabilized. It not only generates ecological benefits for local areas but also affects circulation media such as wind and has an impact on surrounding areas. Therefore, it is urgent to study the flow process and influence of the SFS, so as to provide a theoretical basis for cross‐regional ecological compensation. We chose Xilingol League (shorten as "Xilingol") as the study area and used the hybrid single‐particle Lagrangian integrated trajectory (HYSPLIT) model to comprehensively identify the spatial flow paths (FPs) and beneficiary ranges (BRs) of the SFS from 2000 to 2018. The results showed that there were 726 FPs of the SFS, which were mainly distributed in spring, accounting for 63.50% of the total FPs. The total area of the BRs was 279.50 × 104 km2, accounting for 29.15% of China's land area. The high‐frequency BRs were mainly distributed in the southeast of Inner Mongolia, northern Hebei, northern Liaoning, northern Beijing, and northwestern Jilin. In terms of BRs, farmland was the largest (92.09 × 104 km2) land cover type, accounting for 34.51% of the total area of the BRs, and the total beneficiary population and gross domestic product accounting for 44.53% and 50.06% of whole China in 2015. Identification of FPs and BRs of SFS in this study could provide a reference to make ecology compensation policy at national level.

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The effects of plant density of Melastoma malabathricum on the erosion rate of slope soil at different slope orientations

Cited by 25 publications

References 56 publications

Dividing the pie: A quantitative review on plant density responses

Dividing the pie: A quantitative review on plant density responses

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

Identifying the flow paths and beneficiary ranges of the sand fixation service: A case‐study in Xilingol League, China

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