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[1]LI Yexin,L Gang,NING Baokuan,et al.Distribution Characteristics of Vegetation Root System and Shear Strength with Ground Fissure in a Dump[J].Research of Soil and Water Conservation,2022,29(04):108-114+120.

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Distribution Characteristics of Vegetation Root System and Shear Strength with Ground Fissure in a Dump

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 04 Page number: 108-114+120 Column: Public date: 2022-06-20

Title:: Distribution Characteristics of Vegetation Root System and Shear Strength with Ground Fissure in a Dump

Author(s):: LI Yexin^1,2, LÜ Gang², NING Baokuan¹, CHEN Sili¹, WANG Daohan², WEI Zhongping³; (1.School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang 110870, China; 2.College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China; 3.Liaoning Academy of Forestry Science, Shenyang 110032, China)

Keywords:: dump; root; shear strength; ground fissure; vegetation restoration

CLC:: S157

DOI:: -

Abstract:: In order to reveal the distribution characteristics of plant roots and shear strength with ground fissure in a dump, the variation of root system, cohesion and internal friction angle of 0—60 cm soil layer were studied by using root drill method, WinRHIZO root analysis system and direct shear apparatus. The results showed that the roots of the three plots mainly distributed in 0—20 cm soil layer, which decreased with the increase of soil depth, and the root density and root weight density of the three plots were 88.81～303.03 roots/10³ cm³ and 0.15～2.69 mg/cm³, respectively; the diameters of plant roots of the three plots were mainly d≤0.1 mm and 0.1 mm<d≤0.3 mm, accounting for 34.79% and 40.99% of the total, respectively; fibrous roots were the main root systems of herbaceous plants, which were abundant in quantity and light in quality; there was a positive correlation between root characteristic parameters and was a significant negative correlation between root characteristic parameters and soil depth; the soil cohesion and internal friction angle of the three plots were 5.56～45.51 kPa and 21.69°～31.67°; with the increase of soil depth, soil cohesion increased at first and then decreased, and the maximum appeared in the 30—40 cm soil layer, which was below the depth of the ground fissures in the soil; cohesion and internal friction angle attenuated with the increase of soil water content; there was a very significant exponential function relationship between cohesion and soil water content, while the relationship between internal friction angle and soil water content was not significant; the attenuation effect of soil water content on cohesion was significantly greater than the internal friction angle.

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Last Update: 2022-06-20