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[1]LI Hongbin,ZHANG Xu,YAO Chen,et al.Study on Root Tensile Mechanical Properties of Six Typical Plants in the Loess Area of Northern Shaanxi[J].Research of Soil and Water Conservation,2023,30(04):122-129.[doi:10.13869/j.cnki.rswc.2023.04.042.]

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Study on Root Tensile Mechanical Properties of Six Typical Plants in the Loess Area of Northern Shaanxi

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 122-129 Column: Public date: 2023-06-10

Title:: Study on Root Tensile Mechanical Properties of Six Typical Plants in the Loess Area of Northern Shaanxi

Author(s):: LI Hongbin¹, ZHANG Xu^2,3, YAO Chen¹, DU Feng^1,2; (1.Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi 712100, China; 2.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China; 3.University of the Chinese Academy of Sciences, Beijing 100049, China)

Keywords:: loess area; tensile strength; mechanical properties; tensile test; single root

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.04.042.

Abstract:: [Objective] The tensile mechanical properties of a single root are the important factors for plants to play the role in soil consolidating and slope protection, the wide distribution of native plants plays a major role in regional soil consolidating and slope protection. It is of great significance to study and compare the tensile mechanical properties of different plant root systems for the selection of slope protection plants in loess areas with steep slopes, deep grooves and frequent landslides. [Methods] The six native plants(Lespedeza cuneata, Artemisia scoparia, Stipa grandis, Artemisia sacrorum, Artemisia giraldii and Carex duriuscula subsp. stenophylloides)in the loess region of northern Shaanxi were selected as the study samples. Through indoor single root tensile test, the mechanical properties of single root tensile force, single root tensile strength and single root extensile rate of the above six plants with different root diameters were compared and analyzed. [Results](1)Within the root diameter range, with the increase of root diameter, the single root tensile forces and single root tensile strengths of 6 plant species followed the increase pattern of a power function e(y=ax^b,b>0)and the decrease pattern of a power function, respectively(y=ax^b,b<0); moreover, the single root limit extensile rates of the 6 plant species increased with the increasing of the root diameter, but there was no significant correlation relationship between them.(2)In the range of 0.05～0.60 mm of root diameter, the influences of plant species on single root tensile force, single root tensile strength and single root extensile rate reached the significant level, and the average tensile forces of the six species decreased in the order: Carex duriuscula subsp. Stenophylloides (10.20 N)>Stipa grandis (7.39 N)>Artemisia sacrorum (6.87 N)>Artemisia giraldii (6.44 N)>Artemisia scoparia (6.34 N)>Lespedeza cuneata (3.37 N); the average tensile strength ranked as Artemisia giraldii (148.44 MPa)>Artemisia sacrorum (141.96 MPa)>Stipa grandis (132.95 MPa)>Carex duriuscula subsp. Stenophylloides (132.68 MPa)>Artemisia scoparia (115.07 MPa)>Lespedeza cuneata (85.86 MPa); the single root extensile rate was in order as Carex duriuscula subsp. Stenophylloides (32.37%)>Artemisia scoparia (17.01%)>Stipa grandis (13.60%)>Artemisia sacrorum (13.15%)>Artemisia giraldii(13.09%)>Lespedeza cuneata (6.98%). [Conclusion] The tensile mechanical properties of the single root of Carex duriuscula subsp. Stenophylloides are better than those of other plants. The results of this study can provide a certain scientific basis for the study of soil and water conservation in the loess area of northern Shaanxi.

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Last Update: 2023-06-10