青海柴达木盆地绿洲农业区硒地球化学特征——以诺木洪绿洲为例

doi:10.11720/wtyht.2020.1029

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Abstract

Through systematic sampling and analysis of soil and crop samples in Nomhon oasis agricultural area of Qaidam basin, Qinghai Province, the geochemical characteristics of selenium, source of selenium, ecological effects of selenium-enriched Lycium barbarum and its development and utilization prospects were identified. The results show that the selenium-rich soil area is 413.6 square kilometers, and the selenium content ranges from 0.23×10 ^-6 to 2.8×10 ^-6, with an average of 0.47×10 ^-6. Selenium-rich soil is alkaline with rich fertility elements and clean soil environment. The source of soil selenium in the study area is Quaternary lacustrine sediments, and the salinization, soil particle size and organic matter content have significant effects on the migration and enrichment of selenium. Wolfberry in Nomhon is clean and pollution-free and has a high proportion of rich selenium, which has a significant positive correlation with soil selenium, and has a great prospect of exploitation and utilization.

Key words： Nomhon selenium-rich soil origin selenium-rich wolfberry ecological effect

Received: 13 January 2019 Published: 03 March 2020

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	Articles by authors
	Bing-Yan JI
	Xiao SHEN
	Zhen YAO
	Tao TIAN
	Feng-Juan MA
	Yu QIU

Cite this article:

Bing-Yan JI,Xiao SHEN,Zhen YAO, et al. Geochemical characteristics of selenium in the oasis agricultural area of Qaidam Basin, Qinghai Province:Exemplified by Nomhon oasis[J]. Geophysical and Geochemical Exploration, 2020, 44(1): 199-206.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1029 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I1/199

Distribution of selenium-rich soil、wolfberry and sample collection point in Nomhon

comparison between the content of main elements in selenium-enriched plough field in Nomhon and the national background value of soil

comparison between the content of main elements in selenium-enriched Forest and grassland in Nomhon and the national background value of soil

Content curve of horizontal soil profile in Nomuhon

Statistical table of selenium content in horizontal soil profile of Nomuhon

relation of organic matter with selenium in the soil of Nomhon

Content curve of vertical profile in the soil of Nomhon

Relation of selenium content between wolfberry and root soil in Numhon

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