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.
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