干旱区生态环境知识资源中心(Arid): 寒旱环境植物护坡力学效应与根系化学成分响应

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	寒旱环境植物护坡力学效应与根系化学成分响应
其他题名	Research on Mechanical Effects of the Vegetation on Slope Protection and Response of Root Chemical Compositions in Cold and Arid Environment
	乔娜; 余芹芹; 卢海静; 胡夏嵩; 李国荣; 朱海丽
来源期刊	水土保持研究
ISSN	1005-3409
出版年	2012
卷号	19 期号:3 页码:108-113
中文摘要	该项研究以试验区两种生长期为6a的灌木植物柠条锦鸡儿、霸王为例,分析了根系中所含半纤维素、木质素、纤维素和果胶质4种主要化学成分及其含量,并探讨了根系力学强度与其化学成分及其含量变化之间的关系。结果表明:柠条锦鸡儿根系平均抗拉强度为28.36~34.75MPa,霸王为4.53~6.61MPa,即柠条锦鸡儿根系平均抗拉强度显著大于霸王,且这两种灌木根系所含的4种化学成分由多至少依次为半纤维素、木质素、纤维素、果胶质,其中柠条锦鸡儿根系半纤维素含量为17.8%~29.03%,木质素为3.41%~5.36%,纤维素为2.3%~2.79%,果胶质为1.45%~2.15%;霸王根系半纤维素含量为15.6%~23.04%,木质素为3.69%~4.89%,纤维素为2.1%~3.06%,果胶质为1.92%~2.37%。两种灌木根系纤维素含量与根径、根系抗拉强度之间均表现出一定相关性;霸王根系半纤维素含量与其根系根径、抗拉强度之间呈相关性;柠条锦鸡儿根系果胶质含量与其根径、根系抗拉强度间均呈相关关系。本项研究可为进一步分析植物根系力学强度及其效应与根系组成特性之间的变化关系提供理论依据。
英文摘要	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.
中文关键词	植物根系 ; 力学效应 ; 抗拉力 ; 抗拉强度 ; 化学成分
英文关键词	plant roots mechanical effect tensile force tensile strength chemical composition
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:4559096
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228617
作者单位	青海大学地质工程系, 西宁, 青海 810016, 中国
推荐引用方式 GB/T 7714	乔娜,余芹芹,卢海静,等. 寒旱环境植物护坡力学效应与根系化学成分响应[J],2012,19(3):108-113.
APA	乔娜,余芹芹,卢海静,胡夏嵩,李国荣,&朱海丽.(2012).寒旱环境植物护坡力学效应与根系化学成分响应.水土保持研究,19(3),108-113.
MLA	乔娜,et al."寒旱环境植物护坡力学效应与根系化学成分响应".水土保持研究 19.3(2012):108-113.