Characteristics analysis of micro-element contents in western Erdos soil and in Tetraena mongolica plant
Zhi, Y.; Yang, C.; Yao, Y.; Gao, T.; Huang, J.
Ying Yong Sheng Tai Xue Bao 15(3): 396-400
2004
ISSN/ISBN: 1001-9332 PMID: 15227987 Document Number: 578519
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 microelements 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.