湖北恩施是(1966)我国发现的第一个高硒区,陕西紫阳为第二个高硒区,来源均是高硒的煤层所致。恩施的石煤含硒最高值达84,123ppm,为世界所罕见,人发硒23.34ppm;紫阳石煤含硒超过30ppm,人发硒58ppm。在两地偶有人畜硒中毒:人表现为脱发、脱甲,重者继发神经症状;在动物表现为脱毛脱蹄。比较中毒区和缺硒区的岩石、土壤、动物、植物、人发、血、尿、动 Enshi, Hubei Province (1966) discovered the first high-selenium region in China, while Ziyang in Shaanxi Province is the second high-selenium region, all of which originated from high selenium coal seams. Enshi’s highest content of selenium coal 84,123ppm, rare in the world, human hair Selenium 23.34ppm; Ziyang stone coal selenium more than 30ppm, human selenium 58ppm. Occasional human and animal husbandry selenium poisoning in two places: people showed alopecia, dementia, severe secondary neurological symptoms; the performance of the animal hair removal. Comparison of poisoning and selenium-deficient areas of rock, soil, animals, plants, human hair, blood, urine, moving