各点居民膳食硒的主要来源为植物性食品,其中谷类食品占有极为重要的地位,就食物平均含硒量(μg/g)而论,高硒点谷物中玉米大于大米,前者均值为1.40,后者为1.07,但糯米高达4.46,其原因不明。高硒点黄豆达2.64,为低硒点黄豆的20倍。高硒点蔬菜达0.980,为低硒点的70倍,在一定膳食结构下,如荒年时,蔬菜硒可能是造成中毒的一项重要膳食硒来源。动物性食物中腊肉为2.44,均为鲜肉的两倍,说明在腌制过程中受到煤烟中硒的污染。 The main source of dietary selenium for all residents is plant food, of which cereal occupies a very important position. In terms of average selenium content (μg / g), the corn with high selenium point is larger than rice with the mean of 1.40, The latter is 1.07, but glutinous rice is as high as 4.46 for unknown reasons. High-selenium point soybeans up to 2.64, 20 times as low selenium point soybean. High-selenium point of vegetables up to 0.980, 70 times the low selenium point, under certain dietary structures, such as shortage of time, vegetable selenium may be an important source of dietary selenium. Bacon was 2.44 in animal foods, both twice as much as fresh meat, indicating contamination with selenium in soot during pickling.