유우(乳牛) 및 한우(韓牛)의 혈청중(血淸中) Carotenoid 및 Vitamin A 함량(含量)

Serum Carotenoid and Vitamin A Concentration of Cattle Fed on Hay and on Pasture

Sera obtained from 20 milk cows and 20 Korean cattle in group feeding and from 20 Korean cattle from different farmhouses were analyzed for the determination of carotenoid and vitamin A by Carr-Price reaction. The result obtained were as follows: 1. Carotenoid contents of sera from milk cows and Korean cattle in group feeding, and from Korean cattle from different farmhouses were in winter $394.7{\mu}g/100ml$, $157.8{\mu}g/100ml$ and $187.9{\mu}g/100ml$, respectively, and were in summer $735.3{\mu}g/100ml$, $728.2{\mu}g/100ml$ and $760.3{\mu}g/100ml$, respectively. 2. Vitamin A contents of sera from milk cows and Korean cattle in group feeding and from Korean cattle from different farmhouses were in winter 101.2 IU/100 ml, 88.9 IU/100 ml and 48.4 IU/100 ml, respectively, and were in summer 212.0 IU/100 ml, 208.7 IU/100 ml and 208.3 IU/100 ml respectively.