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[1]QIAO Na,YU Qin-qin,LU Hai-jing,et al.Research on Mechanical Effects of the Vegetation on Slope Protection and Response of Root Chemical Compositions in Cold and Arid Environment[J].Research of Soil and Water Conservation,2012,19(03):108-113.

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Research on Mechanical Effects of the Vegetation on Slope Protection and Response of Root Chemical Compositions in Cold and Arid Environment

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 19 Number of periods: 2012 03 Page number: 108-113 Column: Public date: 2012-06-20

Title:: Research on Mechanical Effects of the Vegetation on Slope Protection and Response of Root Chemical Compositions in Cold and Arid Environment

Author(s):: QIAO Na¹, YU Qin-qin¹, LU Hai-jing¹, HU Xia-song^1,2, LI Guo-rong¹, ZHU Hai-li¹; 1. Department of Geological Engineering, Qinghai University, Xi’ning 810016, China;
2. Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xi’ning 810008, China

Keywords:: plant roots; mechanical effect; tensile force; tensile strength; chemical composition

CLC:: S714.7

DOI:: -

Abstract:: Two kinds of shrubs named Caragana korshinskⅡ and Zygophyllum xanthoxylon in testing area were examined. Four major chemical compositions and their contents, such as hemicelluloses, lignin, cellulose and pectin, were analyzed. Then the relationship between the tensile strength and contents of chemical compositions of roots were investigated. The test results showed: the average tensile strength of Caragana korshinskⅡ roots with 28.36~34.75 MPa was significantly greater than that of Zygophyllum xanthoxylon roots with 4.53~6.61 MPa. And the hemicelluloses contents in two shrubs’ roots were the biggest following by lignin, cellulose, and pectin, for example, the content of hemicelluloses in Caragana korshinskⅡ roots was 17.8%~29.03%, the lignin was 3.41%~5.36%, the cellulose and pectin were 2.3%~2.79% and 1.45%~2.15%, respectively. In Zygophyllum xanthoxylon roots, contents of four chemical compositions were 15.6%~23.04% of hemicelluloses, 3.69%~4.89% of lignin, 2.1%~3.06% of cellulose, 1.92%~2.37% of pectin. A significant correlation was shown between their root diameters, the cellulose content and their tensile strength in both two shrubs. For Zygophyllum xanthoxylon roots, it also showed a significant correlation between its root diameter, its hemicelluloses content and its tensile strength. However, for Caragana korshinskⅡ, the change of the pectin content of roots affected its diameter and tensile strength extraordinarily. The study results will provide a theoretical basis for further analyzing a relationship between plant root mechanical strength and effect of the composition characteristics of roots.

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