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张家口地区人群发硒水平按克山病重病村—中轻病村—非病村依次为０．１９５μｇ／ｇ、０．２１１μｇ／ｇ、０．２３７μｇ／ｇ，呈逐渐增高的趋势，病村发硒水平相当接近或略低于全国低硒水平（０．２μｇ／ｇ）。病村人群血清硒０．０２７～０．１２２μｇ／ｍｌ，平均０．０４８μｇ／ｍｌ，也低于正常硒环境的健康人血清硒水平。因此，张家口病区人群处于一种低硒或低硒边缘营养状态。粮食硒与人发硒较好的对应关系表明，人体低硒水平与摄入粮食低硒有关，本区存在一个低硒生态营养环境
The level of selenium in population in Zhangjiakou area was significantly higher than that in Keshan disease-moderate disease village-non-disease village, followed by 0.195μg / g, 0.211μg / g, 0.237μg / g, Selenium levels are quite close or slightly below the national low selenium level (0.2 μg / g). Sick village population serum selenium 0.027 ~ 0.122μg / ml, an average of 0.048μg / ml, also lower than the normal selenium environment of healthy serum selenium levels. Therefore, the population of Zhangjiakou ward in a low-selenium or selenium marginal nutritional status. The correlation between grain selenium and human hair selenium shows that the low level of selenium in human body is related to the low selenium intake of grain, and there is a low selenium ecological nutrient environment in this area