张家界市部分农作物可食部位硒含量研究

采用国家标准( GB/T5009.93-2003),用荧光分光光度计对张家界市22种农作物40个样本可食部位中的硒含量进行了分析.结果表明,测定的22个种类40个样本均属于富硒及高硒作物,以茶叶的硒平均含量最高为2.0102 mg/kg,其次是豆类平均含量为1.8518 mg/kg,薯类含量最低为1.0240 mg/kg.所测定的各种作物可食部位富硒能力依次为:茶叶2.0102 mg/kg＞豆类(干)1.8518 mg/kg＞水稻、玉米1.5326 mg/kg＞蔬菜类1.3438 mg/kg＞水果类1.0783 mg/kg＞薯类1.0240 mg/kg.该研究确定了部分农作物硒含量的水平及富硒作物品种.

Selenium Content Determination in Edible Parts of Crops in Zhangjiajie City

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.