Root distribution of poplar at varying densities on pastoral hill country

Douglas, Grant; McIvor, Ian; Potter, J. F.; Foote, Lex G.

doi:10.1007/s11104-010-0331-4

Cited by 40 publications

(35 citation statements)

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“…As pointed out by Burylo Values of the root area ratio of the studied black alder and basket willow are similar to the results obtained for root systems of black poplar and black locust from that region (Zydroń et al, 2016), while measurements of root systems of these species were taken at a slightly different distance from tree trunks (1.0 m). Values of the root area ratio of the studied species are also comparable to the results of measurements of a 17-year-old Chinese thuja, lower than in the case of a 17-year-old black locust (Ji et al, 2012) and higher than root systems of 9-and 10-year-old poplars (Douglas et al, 2010) . So, it can be stated that the area ratio values of the studied plant species are similar to each other and are within the range provided in literature for young trees.…”

Section: Root Area Ratiosupporting

confidence: 84%

The Effect of Root Reinforcement Exemplified by Black Alder (Alnus Glutinosa Gaertn.) and Basket Willow (Salix Viminalis) Root Systems – Case Study in Poland

Zydroń¹

2018

Appl. Ecol. Env. Res.

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Zydroń -Skórski: The effect of root reinforcement exemplified by black alder and basket willow root systems - Abstract. This paper is focused on evaluation of the effect of roots of two species -black alder (Alnus glutinosa Gaerin.) and basket willow (Salix viminalis) on the increase in soil shear strength (root cohesion). The second aim of the paper was to compare the results of calculating root cohesion using the classical Wu/Waldron model and selected fiber bundle models, especially in the context of determining the influence of the criterion of distribution of stresses on calculation results. The research on the studied plant species was conducted on a seven-year plantation of energy crops located in Krakow, Poland, where the test area was modified by covering the natural site by anthropogenic soil. In order to determine the root cohesion site investigations, which included measurements of root area ratio, and laboratory tests, which included determination of root tensile strength, were conducted. The results of root cohesion calculation revealed that the studied species have relatively low values of this parameter. It was also shown that fiber bundle models yield lower values of root cohesion than the classic Wu-Waldron model. Among the fiber bundle models, the lowest values of the investigated parameter were obtained using the deformation model that takes into account the function of probability distribution of root tensile strength.

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Section: Root Area Ratiosupporting

confidence: 84%

The Effect of Root Reinforcement Exemplified by Black Alder (Alnus Glutinosa Gaertn.) and Basket Willow (Salix Viminalis) Root Systems – Case Study in Poland

Zydroń¹

2018

Appl. Ecol. Env. Res.

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“…The slope then becomes reinforced with these poles (Rey 2009). On hillslopes and riverbanks, both poplar and willow poles quickly develop extensive lateral root systems that can interlock sufficiently with neighbouring trees Douglas et al 2010). …”

Section: Limitations In the Use Of Traditional Speciesmentioning

confidence: 99%

Ecological mitigation of hillslope instability: ten key issues facing researchers and practitioners

et al. 2014

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Background Plants alter their environment in a number of ways. With correct management, plant communities can positively impact soil degradation processes such as surface erosion and shallow landslides. However, there are major gaps in our understanding of physical and ecological processes on hillslopes, and the application of research to restoration and engineering projects.Scope To identify the key issues of concern to researchers and practitioners involved in designing and implementing projects to mitigate hillslope instability, we organized a discussion during the From this discussion, ten key issues were identified, considered as the kernel of future studies concerning the impact of vegetation on slope stability and erosion processes. Each issue is described and a discussion at the end of this paper addresses how we can augment the use of ecological engineering techniques for mitigating slope instability. Conclusions We show that through fundamental and applied research in related fields (e.g., soil formation and biogeochemistry, hydrology and microbial ecology), reliable data can be obtained for use by practitioners seeking adapted solutions for a given site. Through fieldwork, accessible databases, modelling and collaborative projects, awareness and acceptance of the use of plant material in slope restoration projects should increase significantly, particularly in the civil and geotechnical communities.

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“…Some knowledge and understanding of how widespaced trees contribute to slope stabilisation is provided by limited data on the root distribution of young (<12 years) poplar and willow trees on slopes (McIvor et al 2008;McIvor et al 2009;Douglas et al 2010). However, although significant advances in understanding have been made in the last decade, and are being used to refine planting recommendations, a key gap is linking the mechanical quantification of root reinforcement with its effects on slope stability.…”

Section: Introductionmentioning

confidence: 99%

Modelling of root reinforcement and erosion control by ‘Veronese’ poplar on pastoral hill country in New Zealand

Schwarz

Phillips

Marden

et al. 2016

N.Z. j. of For. Sci.

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Background: The control of erosion processes is an important issue worldwide. In New Zealand, previous studies have shown the benefits of reforestation or bioengineering measures to control erosion. The impetus for this work focuses on linking recent research to the needs of practitioners by formulating quantitative guidelines for planning and evaluation of ground bioengineering stabilisation measures. Methods: Two root distribution datasets of 'Veronese' poplar (Populus deltoides x nigra) were used to calibrate a root distribution model for application on single root systems and to interacting root systems at the hillslope scale. The root distribution model results were then used for slope stability calculations in order to quantitatively evaluate the mechanical stabilisation effects of spaced trees on pastoral hillslopes. Results: This study shows that root distribution data are important inputs for quantifying root reinforcement at the hillslope scale, and that root distribution strongly depends on local environmental conditions and on the tree planting density. The results also show that the combination of soil mechanical properties (soil angle of internal friction and cohesion) and topographic conditions (slope inclination) are the major parameters to define how much root reinforcement is needed to stabilise a specific slope, and thus the spacing of the trees to achieve this. Conclusions: For the worst scenarios, effective root reinforcement (>2 kPa) is reached for tree spacing ranging from 2500 stems per hectare (sph) for 0.1 m stem diameter at breast height (DBH) to 300 sph for 0.3 m stem DBH. In ideal growing conditions, tree spacing less than 100 sph is sufficient for stem DBH greater than 0.15 m. New quantitative information gained from this study can provide a basis for evaluating planting strategies using poplar trees for erosion control on pastoral hill country in New Zealand.

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Root distribution of poplar at varying densities on pastoral hill country

Cited by 40 publications

References 40 publications

The Effect of Root Reinforcement Exemplified by Black Alder (Alnus Glutinosa Gaertn.) and Basket Willow (Salix Viminalis) Root Systems – Case Study in Poland

The Effect of Root Reinforcement Exemplified by Black Alder (Alnus Glutinosa Gaertn.) and Basket Willow (Salix Viminalis) Root Systems – Case Study in Poland

Ecological mitigation of hillslope instability: ten key issues facing researchers and practitioners

Modelling of root reinforcement and erosion control by ‘Veronese’ poplar on pastoral hill country in New Zealand

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