title: [Characteristics analysis of micro-element contents in western Erdos soil and in Tetraena mongolica plant].
abstract: This paper studied why the ex-situ conservation of Tetraena mongolica isn't successful. Through measuring and analyzing the micro-element contents in the soil where Tetraena mongolica is naturally distributed and where Tetraena mongolica is introduced in western Erdos. The results showed that among the areas where Tetraena mongolica is native to and the ex situ protection area, the average contents of 9 micro-elements, except B, are not only obviously higher than the average values in China's soil, but also higher than the values in desert areas. The contents of all micro-elements, except Cu, in the ex situ protection area are higher than desert and the natural distribution areas of Tetraena mongolica. Among the contents of the micro-elements in Tetraena mongolica plant, Fe, Cu, Zn, B, Se and Co are quite higher than that in other plant species on steppes, and Mo is higher than that in other plant species but is only 50% to the desert plants. The correlation coefficient for the contents of micro-elements between soil and plants (including adults and seedlings) are not significant and the contents in Tetraena mongolica plant are much higher than available contents of the counterparts in soil. By comparing the contents of micro-elements in Tetraena mongolica, grassland plants on steppe and desert and the contents in soil, it can be seen that every micro-element was enriched by Tetraena mongolica during its growth. The results do not support the suggestion that the contents of micro-elements in soil is the factor restricting the growth of Tetraena mongolica in the ex situ protection area.
authors.affiliation: Department of Ecology and Environment Science, Inner Mongolica University, Huhehaote 010021, China. zyb.china@163.com
authors.forename: Yingbiao
authors.initials: Y
authors.lastname: Zhi
authors.forename: Chi
authors.initials: C
authors.lastname: Yang
authors.forename: Yiping
authors.initials: Y
authors.lastname: Yao
authors.forename: Tianyun
authors.initials: T
authors.lastname: Gao
authors.forename: Jie
authors.initials: J
authors.lastname: Huang
mesh_terms: D003247:Conservation of Natural Resources; D004463:Ecology; D012987:Soil / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis*; D014197:Trees / Q000254:growth & development*
chemical_list: D012987:Soil; D014131:Trace Elements