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[1]ZHOU Linhu,HU Xiasong,LIU Changyi,et al.In-situ Pull-out Test of Four Shrub Plants in Xining Basin of the Loess Plateau[J].Research of Soil and Water Conservation,2019,26(05):236-242.

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In-situ Pull-out Test of Four Shrub Plants in Xining Basin of the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 05 Page number: 236-242 Column: Public date: 2019-09-06

Title:: In-situ Pull-out Test of Four Shrub Plants in Xining Basin of the Loess Plateau

Author(s):: ZHOU Linhu¹, HU Xiasong^1,2, LIU Changyi¹, XU Zhiwen¹, XU Tong¹, SHEN Ziyan¹; 1. Department of Geological Engineering, Qinghai University, Xining 810016, China;
2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

Keywords:: Xining Basin; loess region; shrub plants; pull-out resistance; regression equation; grey correlation method

CLC:: TU413

DOI:: -

Abstract:: We determined the pull-out resistance of four three-year-old shrub plants (Caragana korshinskii Kom., Lycium barbarum L., Nitraria tangutorum Bor. and Sarcozygium xanthoxylon Bunge) by the in-situ pull-out test in the cold and semi-arid climate of Xining Basin. The relationship between the pull-out resistance and the growth indexes such as plant height, crown diameter, ground diameter, root length and lateral root number were analyzed, and the effects of four shrubs on soil slope protection were discussed. The results show that:(1) the decending order of pull-out resistance of the four shrubs in the studying area is Caragana korshinskii Kom.(256.39 N), Lycium barbarum L.(222.80 N), Nitraria tangutorum Bor.(178.52 N) and Sarcozygium xanthoxylon Bunge(134.84 N), the pull-out resistances of Caragana korshinskii Kom. and Lycium barbarum L. are relatively greater than those of Nitraria tangutorum Bor. and Sarcozygium xanthoxylon Bunge; (2) an exponential function relationship between pull-out resistance and plant height is found, a power function relationship between pull-out resistance and ground diameter is found, a linear function relationship between pull-out resistance and crown diameter, root length and lateral root number is found; (3) the correlations obtained by grey correlation analysis method between pull-out resistance and plant height, crown diameter, ground diameter, root length and lateral root number were 0.623, 0.669, 0.629, 0.730 and 0.719, respectively, therefore, the main factors affecting the pull-out resistance of the four shrubs are root length and lateral root number. The results of this study have certain theoretical research value and practical guiding significance for scientific prevention of soil erosion and shallow landslides by planting shrubs in the cold and semi-arid loess areas.

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