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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Al、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.
Taking the herbaceous plantations of Tuotuohe borrow soil field of Qinghai-Tibet Railway as an example, in-situ drawing test, indoor tensile test and shear test of 6 species of herbaceous plants with 5a growth stage were conducted in the field and indoors respectively. In the experimental area, the root pull-out resistances of six kinds of herbs such as Solomontia sargassum, Alhumna sativa, Poa pratensis, Leymus latifolia, Elymus nutans, Aster sinesis and so on were 187.34-57.89N and 4.44-2.99N, The results showed that aboveground stems and leaves and underground roots mainly contain Al, Ca, Mg and K , Fe, Sr, Zn and Mn, among which the contents of four elements Al, Ca, Mg and K were significantly higher than those of other elements. In addition, Ca, Fe, Zn, Sr, Cu and other six kinds of elements were significantly greater than the corresponding herbaceous stems and leaves part of the test area six kinds of herbs descending order from descending order Solon grass, Lai grass, bluegrass, Elymus nigrum, alkali The first 8 kinds of main chemical elements contained in the roots of 6 species of herbaceous plants, such as Alnus mandshurica, Star grass, This indicates that the mechanical strength of six kinds of herbaceous root-fixing soil in the borrow area has a certain relationship with the chemical elements contained in the roots.