Prosbová M, Kovác G, Vrzgula L
Vet Med (Praha). 1979 Jun;24(6):331-6.
The results of the study of the dynamics of selenium in the blood serum were compared in 31 piglets from birth to the age of 90 days. The analyzed selenium values in the blood serum immediately after birth (0.14--0.20 ppm) provide evidence of the intra-uterine placental passage of selenium. In the period of colostral and milk nutrition, the serum concentrations of selenium showed a statistically insignificant variation, followed by an abrupt drop of the level of the microelement in the weaning period (60th day). The individual values in this period ranged from 0.08 to 0.12 ppm. Towards the end of the study, the level of selenium in the blood serum of the piglets returned to its initial value; this indicates that although the critical period connected with weaning has a transient nature, it should be averted for preventing the occurrence of a selenium-deficit disease; this can be done by adding a supplement of 0.2% solution of sodium selenate or a combined preparation of selenium and vitamin E-Selevit.
对31头仔猪从出生到90日龄血清中硒的动态变化研究结果进行了比较。出生后即刻血清中分析的硒值（0.14--0.20 ppm）证明了硒在子宫内通过胎盘传递。在初乳和乳汁营养期，血清中硒的浓度显示出无统计学意义的变化，随后在断奶期（第60天）微量元素水平急剧下降。此期间个体值范围为0.08至0.12 ppm。在研究接近尾声时，仔猪血清中硒的水平恢复到初始值；这表明尽管与断奶相关的关键期具有短暂性，但应避免其发生以防止硒缺乏疾病；这可以通过添加0.2%亚硒酸钠溶液补充剂或硒与维生素E的复合制剂-Selevit来实现。
