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KMID : 0359320010410030407
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Korean Journal of Veterinary Research
2001 Volume.41 No. 3 p.407 ~ p.412
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Studies on health management and nutritional evaluation by milk components analysis in Holstein cows
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김종만/Kim, Jong Man
문진산/강현미/손창호/주이석/장금찬/Moon, Jin San/Kang, Hyun Mi/Son, Chang Ho/Joo, Yi Seok/Jang, Gum Chan
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Abstract
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Milk data may be increasingly used as indicators of the protein-energy balance and actual farm feeding practices. It was related to milk production, nutritional and reproductive disorders. The purpose of this study was to investigate the relationship between level of fat, protein or milk urea nitrogen (MUN) from the first test within 35 days in milk and displaced abomasum (DA) in a large dairy herd with high yielding Holstein cows. Milk data from forty-five DA cases were compared to those from 90 healthy cows. Higher odds of DA diagnosis was found with higher 5.0% milk fat, lower 3.0% milk protein. Therefore, cows with a fat to protein ratio of >1.5 had higher risks for DA. Also, incidence rates of DA was higher in the cows which the level of MUN was lower than 12.0mg/dl or higher than 25.0 mg/dl relative to healthy cows. These results indicate that cows diagnosed with DA were energy deficient prior to DA diagnosis. We conclude that level of fat, protein or MUN serve as a monitoring tool of protein and energy nutritional balance in early lactation cows and also as a significant predictor of risk for DA.
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KEYWORD
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cow, milk composition, displaced abomasum
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