水土保持研究2012，Vol.19Issue(3)：108-113,6.
寒旱环境植物护坡力学效应与根系化学成分响应
Research on Mechanical Effects of the Vegetation on Slope Protection and Response of Root Chemical Compositions in Cold and Arid Environment
摘要
Abstract
Two kinds of shrubs named Caragana korshinskii and Zygophyllum xantho3cylon 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 ：canthozcylon roots with 4.53%6.61 MPa. And the hemicelluloses contents in two shrubsI 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 aantho：zylon roots, contents of four chemical compositions were 15. 6%-23. 04% ofhemicelluloses, 3.69%-4.89% of lignin, 2.1%-3.06% of cellulose, 1. 925%- 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 zcanthoxylon 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.关键词
植物根系/力学效应/抗拉力/抗拉强度/化学成分Key words
plant roots/mechanical effect/tensile force/tensile strength/chemical composition分类
农业科技引用本文复制引用
乔娜,余芹芹,卢海静,胡夏嵩,李国荣,朱海丽..寒旱环境植物护坡力学效应与根系化学成分响应[J].水土保持研究,2012,19(3):108-113,6.基金项目
国家自然科学基金资助项目 （）
教育部“新世纪优秀人才支持计划”资助项目 （）
长安大学西部矿产资源与地质工程教育部重点实验室开放基金资助 （）
