ANALYSIS ON SELENIUM-RICH CROPS IN ANKANG DISTRICT,SHAANXI-THE CASE OF ZIYANG COUNTY
陕西安康地区紫阳县富硒作物分析

n the basis of detailed field work and laboratory analysis,it is found out that selenium contents in crops vary in different places of Ziyang County.Selenium contents in corn,tea,potato and rice in the county range from 0.1-6.6ppm which are 3-200 times that of the same crops grown in many places.Selenium conments in the crops of Ziyang are closely related with selenium content and texture of the bedrocks as well as landform characteristics.In this paper,selenium contents of the same crops in Ziyang,law of selenium enrichment in crops and their distributional districts as well as their development and utilization prospects are analyzed and discussed.