| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Animal Science, University of Tennessee, Knoxville 37901
Effects of weaning age on blood glucose, ketones, and nonesterifid fatty acids were examined using 16 Holstein heifer calves. Animals entered the study at 6 ± 3.5 d of age and were fed 1.8 kg of milk twice daily to 28 (early weaning) or 56 d (late weaning) and a commercial pelleted calf starter from 0 (early) or 28 d (late). Blood was sampled once weekly for 14 wk and analyzed for ß-hydroxybutyrate and acetoacetate. Plasma was analyzed for glucose and nonesterifid fatty acids. Blood ß-hydroxybutyrate increased with increasing grain intake and was greater during wk 0 to 4 and 5 to 8 in calves weaned early than in those weaned late. Blood acetoacetate followed trends similar to ß-hydroxybutyrate and averaged 23.8 and 16.1 µM in calves weaned early and late, respectively. Plasma glucose and nonesterifid fatty acids declined with age and were lower during 5 to 8 wk in calves weaned early. Data suggest that ketone concentrations resulted from alimentary ketogenesis, which increased rapidly after weaning.
Key Words: calves • ruminal development • ketones
Submitted on March 19, 1990
Accepted on July 20, 1990
This article has been cited by other articles:
|
|
 |
|
  K. M. Daniels, S. R. Hill, K. F. Knowlton, R. E. James, M. L. McGilliard, and R. M. Akers Effects of Milk Replacer Composition on Selected Blood Metabolites and Hormones in Preweaned Holstein Heifers J Dairy Sci, July 1, 2008; 91(7): 2628 - 2640. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
V. J. A. Magalhaes, F. Susca, F. S. Lima, A. F. Branco, I. Yoon, and J. E. P. Santos Effect of Feeding Yeast Culture on Performance, Health, and Immunocompetence of Dairy Calves J Dairy Sci, April 1, 2008; 91(4): 1497 - 1509. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. A. Bascom, R. E. James, M. L. McGilliard, and M. Van Amburgh Influence of Dietary Fat and Protein on Body Composition of Jersey Bull Calves J Dairy Sci, December 1, 2007; 90(12): 5600 - 5609. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Khan, H. J. Lee, W. S. Lee, H. S. Kim, K. S. Ki, T. Y. Hur, G. H. Suh, S. J. Kang, and Y. J. Choi Structural Growth, Rumen Development, and Metabolic and Immune Responses of Holstein Male Calves Fed Milk Through Step-Down and Conventional Methods J Dairy Sci, July 1, 2007; 90(7): 3376 - 3387. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Klotz and R. N. Heitmann Changes in Net Portal Nutrient Flux in Response to Weaning Transition and Ionophore Supplementation in Dairy Calves J Dairy Sci, March 1, 2007; 90(3): 1326 - 1339. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Suarez, C. G. Van Reenen, W. J. J. Gerrits, N. Stockhofe, A. M. van Vuuren, and J. Dijkstra Effects of supplementing concentrates differing in carbohydrate composition in veal calf diets: II. Rumen development. J Dairy Sci, November 1, 2006; 89(11): 4376 - 4386. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Klotz and R. N. Heitmann Effects of weaning and ionophore supplementation on selected blood metabolites and growth in dairy calves. J Dairy Sci, September 1, 2006; 89(9): 3587 - 3598. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. C. Stanley, C. C. Williams, B. F. Jenny, J. M. Fernandez, H. G. Bateman II, W. A. Nipper, J. C. Lovejoy, D. T. Gantt, and G. E. Goodier Effects of Feeding Milk Replacer Once Versus Twice Daily on Glucose Metabolism in Holstein and Jersey Calves J Dairy Sci, September 1, 2002; 85(9): 2335 - 2343. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
