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KMID : 0359319950350040823
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Korean Journal of Veterinary Research
1995 Volume.35 No. 4 p.823 ~ p.831
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Pre- and post-paturition rumen volatile fatty acid composition and blood chemistry in ketotic and non-ketotic dairy cows
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Hamakawa Masaaki
Shohji Hiroshisa
Sakai Takeo
Lee Won-Chang
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Abstract
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The composition of rumen volatile fatty acids(VFA) and the blood chemistry were investigated in 5 clinically health dairy cows(Group I) reared on dairy farms and in 5 cows with post-parturition(POP) primary ketosis(Group II). The determinations were performed on days 5 to 7 pre-parturition(PRP), immediately POP, and on days 5, 10, 15, 20 and 25 POP. In both groups, the total VFA levels gradually increased starting from day 5 POP, but the levels were lower in Group II than in Group I. With regard to POP. changes in the composition of VFA, Group II occasionally showed lower levels of acetic acid and caproic acid than did Group I. Blood glucose levels decreased POP in both groups. In contrast, blood levels of ketone bodies and 3-hydroxybutyric acid were increased POP, but there was no statistically by significant difference between the groups. The aspartate aminotransferase level was transiently increased immediately POP in both groups, and the increase was more marked in Group II than in Group I. Both groups showed a tendency for total cholesterol, free cholesterol, ester cholesterol, phospholipid, and total bile acid to be increased POP, but there was no statistically significant difference between the groups. Clinically healthy dairy cows also showed POP changes in the composition of VFA and blood similar to those in dairy cows with ketosis, suggesting that even apparently healthy cows are at risk of subclinical ketosis POP.
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KEYWORD
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VFA& blood chemistry , ketosis , paturition , healthly & ketosis , dairy cows
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