干旱区生态环境知识资源中心(Arid): 青藏铁路沱沱河取土场草本植物固土力学强度与化学元素含量特征

Arid

	青藏铁路沱沱河取土场草本植物固土力学强度与化学元素含量特征
其他题名	The Roots-Reinforcing Strength of Herbs and Chemical Element Contents in the Tuotuohe River Earth-Borrowed Area along the Qinghai-Tibet Railway
	胡夏嵩 1; 陈桂琛 2; 周国英 2; 徐文华 2; 李国荣 1; 朱海丽 1; 李天才 2; 余芹芹 1; 乔娜 1
来源期刊	冰川冻土
ISSN	1000-0240
出版年	2012
卷号	34 期号:5 页码:1190-1199
中文摘要	以青藏铁路沱沱河取土场草本植物种植区为例,在野外和室内分别对生长期为5a的6种草本做了原位拉拔试验、室内拉伸试验和剪切试验,分别得到了试验区梭罗草、碱茅、冷地早熟禾、赖草、垂穗披碱草、星星草等6种草本根系抗拔力为187.34~57.89N、抗拉力为4.44~2.99N,抗剪力为4.33~3.85N.同时,对取土场试验区6种草本地上茎叶、地下根系15种化学元素进行了分析.结果表明,地上茎叶和地下根系主要含有Al、Ca、Mg、K、Fe、Sr、Zn、Mn等8种元素,其中Al、Ca、Mg、K等4种元素较其余元素含量显著;此外,6种草本其根系所含Ca/Fe/Zn/Sr/Ni/Cu等6种元素含量均显著大于相应草本种的茎叶部分.试验区6种草本抗拔力由大至小依次为梭罗草、赖草、冷地早熟禾、垂穗披碱草、碱茅、星星草,6种草本其根系所含的其中前8种主要化学元素依次为A1、Ca、Mg、K、Fe、Zn、Mn、Sr等元素,这说明了取土场试验区6种草本根系固土力学强度与根系所含化学元素具有一定的关系.
英文摘要	The Tuotuohe earth-borrowed area along the Qinghai-Tibet Railway, where there are various dominant vegetation species, was taken as a testing area. In the area in situ pull-out test, single root tensile and shear tests were carried out to study the roots-reinforcing capability of six herbs with growth period of five years. The testing results show that the roots pull-out resistance is 187. 34~57.89 N, single root tensile resistance is 4.44~2.99 N and single root shear resistance is 4.33~3.85 N. The chemical elements of the six herbs (A1, K, Ca, Mg, Fe, Zn, Sr, Mn, Na, P, Li, Cr, Ni, Co and Cu) within both stems and leaves upon surface and beneath surface were determined, of which 15 chemical elements and their contents were analyzed individually. There are eight chemical elements (Al, Ca, Mg, K, Fe, Sr, Zn and Mn) within stems and leaves and roots being proven to be dominant, among them the contents of Al, Ca, Mg, and K are obviously rich. Besides, the contents of Ca, Fe, Zn, Sr, Ni and Cu within underground roots are more than those within stems and leaves upon surface. The experiment of pull-out resistance on the six herbs with growth period of five years under slope protection found that roots-reinforcing strength ranks as follows: Kengyilia thoroldiana>Leymus secalinus>Poa crymophila>Elymus nutans>Puccinellia distans>Puccinella tenui flora. According to the above sequence, of the fifteen elements, the principal ones are Al, Ca, K, Mg, Fe, Zn, Mn and Sr. From the above mentioned, it is clear that a close relationship exists between the roots-reinforcing strength and the containing of chemical composition within roots.
中文关键词	寒旱环境 ; 沱沱河 ; 取土场 ; 草本植物 ; 根系固土强度 ; 化学元素
英文关键词	cold and arid environment Tuotuohe River earth-borrowed area herbs roots-reinforcing strength chemical element
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4696663
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227732
作者单位	1.青海大学, 西宁, 青海 810016, 中国; 2.中国科学院西北高原生物研究所, 西宁, 青海 810007, 中国
推荐引用方式 GB/T 7714	胡夏嵩,陈桂琛,周国英,等. 青藏铁路沱沱河取土场草本植物固土力学强度与化学元素含量特征[J],2012,34(5):1190-1199.
APA	胡夏嵩.,陈桂琛.,周国英.,徐文华.,李国荣.,...&乔娜.(2012).青藏铁路沱沱河取土场草本植物固土力学强度与化学元素含量特征.冰川冻土,34(5),1190-1199.
MLA	胡夏嵩,et al."青藏铁路沱沱河取土场草本植物固土力学强度与化学元素含量特征".冰川冻土 34.5(2012):1190-1199.