Abstract: Hanwang town of Ziyang county was taken as the research object, and the selenium content of some cultivated soils and growing crops in the area were analyzed. The results showed that 619 soil samples were naturally containing selenium, and the highest selenium content reached 44.504 6 mg/kg, with an average of 1.694 3 mg/kg. Among them, 342 selenium-rich soil samples accounted for 55.25% of the total samples; A total of 332 samples were collected, with an average selenium content of 0.284 1 mg/kg, which reached 115 standard samples of selenium enrichment in Shaanxi province, accounting for 34.64% of the total. The average selenium content of the soil was high, and the average selenium content of the growing crops is correspondingly increased. The selenium content of the crops has a certain correlation with the selenium content of the soil.

Key words: soil, crop, selenium, Ziyang county