Abstract:
The climate of the central and western Qaidam basin is extreme arid, cool and warm. The indigenous halophyte,
Lycium ruthenicum Murray, has some ecological niche. The samples of 0-40 cm soil layer were collected, and the distribution characteristics of elements the original soil of
Lycium ruthenicum Murray in the Qaidam by ultra-fine powder pressing- X ray fluorescence spectrometry. The results showed that the contents of human body essential trace elements Se and Sr in original soil are high, those of Co, Ni, V and Zn are relatively low. The content and enrichment degree (
Kc > 3.0) of Cl, S are all high. The degree of enrichment of rare earth elements is generally low. Ag, Pb, Br and W has the phenomenon of partial aggregation (C.V. > 50%). However, there are no soil elements that exceed the soil pollution risk control limit of "soil environmental quality agricultural land soil pollution risk control standard". The elements of Cl (
Kc > 40.0), S (
Kc > 7.5), Se (
Kc > 4.0) and Sr (
Kc > 1.0) were very highly degree of enrichment in the original soil of
Lycium ruthenicum Murray in the Qaidam basin, which should be resulted from the combination of parent materials and cold high-arid climate.
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