关键词: 张家界市, 农作物, 硒, 荧光分光光度计

Abstract: In order to master the selenium-rich crop resources in Zhangjiajie city and develop selenium-rich tourism agricultural products, the selenium contents in the edible parts of 40 samples of 22 types of crops were determined by fluorescence spectrophotometer according to the method of national standards GB/T5009.93-2003. The results showed that all 40 measured samples of these 22 crops all belonged to selenium-rich crops. Tea leaves had the highest average selenium content, which was 2.0102 mg/kg, followed by beans, the average selenium content was 1.8518 mg/kg, and potatoes had the lowest selenium content, 1.0240 mg/kg. The sequence of the selenium content in the edible parts of these crops was tea leaves 2.0102 mg/kg > beans 1.8518mg/kg > poaceae 1.5326 mg/kg > vegetables 1.3438 mg/kg > fruits 1.0783 mg/kg > potatoes 1.0240 mg/kg. This research identified the selenium content level of a portion of crops and the types of selenium-rich crops, therefore, exerted positive impact on the development of tourism economy of Zhangjiajie city.

Key words: Zhangjiajie City, crops, selenium, fluorescence spectrophotometer