Effect of Soil Selenium on Nutritional Quality of Vegetables in the Selenium-enriched Areas of Qinghai Plateau

In order to improve the added value of the main vegetable products in Qinghai Province, we researched the effect of soil selenium content on vegetable quality in selenium-enriched area of Qinghai. Through the analysis of Qinghai selenium-enriched soil selenium content and 5 kinds of main vegetables corresponds to the total selenium, part of the mineral elements and soluble sugar and VC content, the effects of soil selenium levels on selenium absorption and nourishment quality of vegetables were researched. The results showed that he Qinghai selenium-enriched soil selenium content in the range of 100.00—563.00 μg/kg, among them, the soil samples with sufficient selenium and rich selenium accounted for 76.53% and 18.88%, respectively. Soil selenium content of garlic sampling area was relatively high, and soil selenium content of sugar beet sampling area was relatively low. Vegetable selenium content was in the range of 11.00—340.94 μg/kg, and the average content of the total selenium content of radish is 73.00 μg/kg. 90.63% of the vegetables in the region reached the level of sufficient selenium, and 70.31% reached the level of selenium enrichment. The average content of Ca and Mg was higher than the national average. There was no significant correlation between selenium content of soil and vegetable and nutritional quality.