安康地区土壤硒资源分布规律研究

Study of Selenium-Distribution in Ankang

采用氢化物一原子荧光光度法测定了安康地区耕作层土壤硒含量，用克里金插值法制作了安康地区耕作层土壤硒资源分布图。结果发现，安康地区土壤硒资源分布不均匀，并表现为“南高北低”状况，土壤平均硒含量为0．5677mg／kg，含硒量在0．2—3．0mg／kg范围的土壤占51．90％，安康地区土壤硒含量适中，非常适合天然富硒食品生产。

In this paper, Selenium content in soil of Ankang was analyzed by Hydride-Atomic Fluorescence Spectrometry. The Selenium resources distribution chart of arable layer of soil in Ankang region was made using ArcGIS software and Kriging interpolation method. It was found that the Selenium content of arable layer of soil in Ankang was uneven, the Selenium distribution presented a status of in the south was high while in the north was low. The average Selenium content was 0.5677 mg/kg, and the soil which contained selenium in the range of 0.2-5.0 mg/kg accounted for 51.90 %. Therefore, Ankang region was very suitable for natural Selenium-rich agricultural pro- duction due to its moderate Selenium content.