江苏省苏南村镇居民硒营养水平评价

Evaluation of Selenium Nutrition of Village/Town Inhabitants in South Jiangsu

为了详尽了解太湖流域苏南村镇居民的Se营养状况,采用分层整群随机抽样方法调查了苏南村镇居民的各种食物摄入量,并随机采购其农贸市场出售的植物性食物、动物性食物以及随机对应采集了居民头发样,采用原子荧光光度法测定了各种样品的含Se量。结果表明:苏南村镇动物性食物含Se量高于植物性食物,动物性食品中,虾的含Se量最高;禾谷类和豆类食物的含Se量比蔬菜高。苏南村镇居民人均Se摄入量为34.7μg/天,低于中国营养学会推荐的Se摄入量的最低限值50μg/天,头发Se含量平均为336.0μg/kg,居民膳食Se摄入量和头发Se含量有显著的相关性,低于全国的平均值;居民头发Se含量比广州、上海等地居民低很多。上述结果表明,日常膳食不能满足人体对Se的最低需要,有待开发高效安全的补Se食品。

In order to learn about selenium nutrition of village/town inhabitants in the Taihu Lake region, in South Jiangsu, the stratified clustering random sampling method was used in the study. Vegetal and animal foods were procured randomly from free markets for agricultural products hairs of inhabitants gathered for determination of selenium contents therein, with the aid of Atomic Fluorescence Spectrormetry (AF-610A). Results showed that animal food, especially white shrimp, was higher in selenium content than cereal food and vegetable food. The selenium intake of the inhabitants through diet was 34.7 μg/day, which is lower than the bottom limit for selenium intake,50 μg/day suggested by the National Nutrition Association of China. The lower selenium intake might increase the risk of certain diseases caused by selenium deficiency and show harm on human health. The average Se content in the hairs of the inhabitant was 336.0 μg/kg, which is lower than the average of the nation’s and far too lower than that in Guangzhou and Shanghai regions. It is demonstrated that daily diet in that region is far from enough to meet the lowest need of the inhabitants for Se and it is necessary to develop some safe and effective Se-enriched foods for the people therein.