60～70年代,我们在研究克山病和大骨节病与环境化学因素的关系中,在全国范围内进行了比较系统和全面的硒的地理分布研究,从化学地理和医学地理角度,系统地调查了和测定了我国不同地理条件下岩石、土壤、粮食和人发中硒的含量水平,结果发现:1.我国存在一条由东北到西南的低硒带;2.证实该低硒带与我国克山病和大骨节病带的分布完全吻合;3.在低硒带,从土壤、粮食到人发其硒含量均低, From the 1960s to the 1970s, we investigated the geographical distribution of selenium in a systematic and comprehensive manner in the study of the relationship between Keshan disease and Kashin-Beck disease and environmental chemical factors. From the perspective of chemical geography and medical geography, systematically Investigation and determination of selenium levels in rock, soil, grain and human hair under different geographical conditions in China. The results show that: 1. There is a low selenium belt from northeast to southwest in our country; 2. It is confirmed that the low selenium belt and our country Keshan disease and the distribution of Kashin-Beck disease zone completely consistent; 3 in the low selenium zone, from the soil, grain to human hair its selenium content is low,