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KMID : 0359319740140010017
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Korean Journal of Veterinary Research
1974 Volume.14 No. 1 p.17 ~ p.21
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Vitamin A Concentration of Serum from Infertile Dairy Cows
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Abstract
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The experiment was carried out to determine the concentration of vitamin A by Carr-Price reaction of fifty six sera obtained from normal cows and fourty four sera from the cows with ovarian hypofunction.
The results obtained in this work were summerized as follows:
1. The mean values of vitamin A concentration of sera obtained from the cows with ovarian hypofunction were 88 IU/100 ㎖ in summer (glazing), and in winter 79 IU/100 ㎖ (hay) and 173IU/100 ㎖ (trench silage).
The mean values of vitamin A concentration of sera from normal cows were 212 IU/100㎖ in summer (grazing), and in winter 113IU/100㎖ (hay) and 338IU/100㎖ (trench silage).
The differences of the concentrations of vitamin A among three groups were statistically highly significant (p<0.01).
2. The differences of vitamin A concentrations between the hay group and the trench silage group in normal cows and in cows with ovarian hypofunction were statistically highly significant (p<0.01).
3. The concentrations of vitamin A in summer group (grazing) were higher than those of the hay group in winter in normal cows and in cows with ovarian hypofunction,
4. The concentrations of vitamin A in the trench silage group in winter were higher than those of summer group (grazing) in normal cows and in cows with ovarian hypofunction.
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