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Journal of Nutrition Vol. 95 No. 3 July 1968, pp. 461-468
Copyright © 1968 by American Society for Nutrition
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Effect of Dietary Lipid and Protein on Serum Proteins, Lipids and Glucose in the Blood of Dairy Calves1,2,

P. T. Chandler3, R. D. McCarthy and E. M. Kesler

Department of Dairy Science, The Pennsylvania State University, University Park, Pennsylvania

The effects of dietary corn oil and soy protein upon blood serum proteins, blood lipids and glucose were determined in 36 male. Holstein calves at ages 8, 13, and 18 weeks. Additions of corn oil and soy protein to a basal diet were varied from zero to 8% and zero to 28%, respectively. Blood serum proteins were not affected by age of calves when sampled but were significantly affected by ration at 13 and 18 weeks. At low dietary protein levels, increased levels of corn oil lowered blood serum proteins. Of the blood serum proteins, ß-globulin was the most responsive to dietary changes. Maximal values for blood glucose occurred with dietary combinations that resulted in maximal growth. Blood lipids were affected by the age of the calf as well as ration. A gradual increase was noted in the blood lipid level as the trial progressed. Phospholipids appeared to account largely for the increase observed from 8 to 13 weeks, whereas the 13- to 18-week increase was a result of increased cholesterol. A quadratic relationship existed between dietary corn oil and blood cholesterol, with maximal cholesterol values occurring at approximately 4% corn oil. Dietary protein expressed a negative linear effect upon blood lipids.

1 Authorized for publication on December 20, 1967 as Paper no. 3345 in the Journal Series of the Pennsylvania Agricultural Experiment Station.

2 Some of the data were presented at the 1966 meeting of the American Society of Animal Science, July 31–August 4, Rutgers University, New Brunswick, New Jersey.

3 Present address: Department of Dairy Science, Virginia Polytechnic Institute, Blacksburg, Virginia.

Manuscript received 22 January 1968.




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