| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Animal Science University of Connecticut, Storrs 06269
2 W. H. Miner Agricultural Research Institute Chazy, NY 12921
The rate and extent of estimated energy mobilization and the relationship between fat depth at the rib and thurl and body condition score (BCS) were investigated in Jersey and Holstein cows in early lactation. Twenty-six cows were paired by breed, parity, and calving date, and were individually fed a total mixed ration ad libitum from parturition through 120 d in milk. Feed intake and milk production were measured daily; body weight (BW), BCS, subcutaneous fat depth, milk composition, and concentration of plasma nonesterified fatty acids were measured every 2 wk. Estimated tissue energy balance (TEB) was calculated using 1989 NRC equations. Net energy intake was greater in early lactation for Holsteins compared with Jerseys, 37.8 and 28.2 Mcal/d, respectively. Milk energy was greater for Holsteins relative to Jerseys, 30.5 versus 21.2 Mcal/d. Fat depth and BCS did not differ between breeds. A positive relationship existed between fat depth and BCS for Jerseys; however, there was no significant relationship for Holsteins. The best-fit regression model for predicting TEB for Holsteins and Jerseys in early lactation included week of lactation, milk composition, and BCS. Jerseys remained in negative TEB for a shorter period of time relative to Holsteins. The TEB nadir was –6.19 and –12.9 Mcal/d, for Jerseys and Holsteins, respectively. Expressed as a proportion of metabolic BW (BW0.75), net energy intake did not differ between breeds, yet milk energy and estimated tissue energy loss were greater for Holsteins compared with Jerseys.
Key Words: early lactation • energy balance • Holstein • Jersey
Submitted on July 27, 2000
Accepted on December 12, 2000
This article has been cited by other articles:
|
|
 |
|
  G. E. Chibisa, G. N. Gozho, A. G. Van Kessel, A. A. Olkowski, and T. Mutsvangwa Effects of Peripartum Propylene Glycol Supplementation on Nitrogen Metabolism, Body Composition, and Gene Expression for the Major Protein Degradation Pathways in Skeletal Muscle in Dairy Cows J Dairy Sci, September 1, 2008; 91(9): 3512 - 3527. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. Heins, L. B. Hansen, A. J. Seykora, A. R. Hazel, D. G. Johnson, and J. G. Linn Crossbreds of Jersey x Holstein Compared with Pure Holsteins for Body Weight, Body Condition Score, Dry Matter Intake, and Feed Efficiency During the First One Hundred Fifty Days of First Lactation J Dairy Sci, September 1, 2008; 91(9): 3716 - 3722. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A.-K. Nyman, U. Emanuelson, K. Holtenius, K. L. Ingvartsen, T. Larsen, and K. P. Waller Metabolites and Immune Variables Associated with Somatic Cell Counts of Primiparous Dairy Cows J Dairy Sci, August 1, 2008; 91(8): 2996 - 3009. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. C. Aikman, C. K. Reynolds, and D. E. Beever Diet Digestibility, Rate of Passage, and Eating and Rumination Behavior of Jersey and Holstein Cows J Dairy Sci, March 1, 2008; 91(3): 1103 - 1114. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. D. French Dry matter intake and blood parameters of nonlactating holstein and jersey cows in late gestation. J Dairy Sci, March 1, 2006; 89(3): 1057 - 1061. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
P. S. Chan, J. W. West, J. K. Bernard, and J. M. Fernandez Effects of Dietary Cation-Anion Difference on Intake, Milk Yield, and Blood Components of the Early Lactation Cow J Dairy Sci, December 1, 2005; 88(12): 4384 - 4392. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Wattiaux, E. V. Nordheim, and P. Crump Statistical Evaluation of Factors and Interactions Affecting Dairy Herd Improvement Milk Urea Nitrogen in Commercial Midwest Dairy Herds J Dairy Sci, August 1, 2005; 88(8): 3020 - 3035. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
