| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Laboratoire Lactation et Elevage des Ruminants, Institut National de la Recherche Agronomique, Theix, 63122 St.-Genès-Champanelle, France
Body weight, condition score, deuteriated water dilution space, estimated body lipids and proteins, and calculated energy and protein balances were determined in 24 multiparous Holstein cows at wk 1, 7, 20, and 39 after parturition. Cows received two levels of energy concentrate (high and low groups) from wk 3. The objective was to estimate changes in body composition as affected by stage of lactation, concentrate level, and bST administration or placebo from wk 9 in a 2 x 2 factorial design.
Cows from high and low energy groups lost 25 and 35 kg of body lipids and 3.3 and .5 kg of body proteins, respectively, during the first 7 wk of lactation. During the end of the winter period (wk 8 to 20), control and bST-injected cows lost 8.5 and 21.1 kg of body lipids, respectively. During the grazing period (wk 20 to 39), bST-injected cows gained more BW (34 kg), water (36 kg), and estimated proteins (5.8 kg) and lost more condition score (–.2 units) and estimated lipids (–11.5 kg) than controls.
Using data from control periods, it was calculated that 1 unit change in body condition score corresponded to changes of 35 to 44 kg in BW (corrected for estimated gut content variation), 21 to 29 kg in body lipids, and 200 to 300 Mcal in body energy. One kilogram of corrected BW change corresponded to a change of 4.3 or 5.5 to 5.9 Mcal in body energy when calculated from cumulative energy balances or body components, respectively.
Key Words: cow • lactation • somatotropin • body composition
Submitted on January 4, 1991
Accepted on April 19, 1991
This article has been cited by other articles:
|
|
 |
|
  J. M. Bewley and M. M. Schutz Review: An Interdisciplinary Review of Body Condition Scoring for Dairy Cattle Professional Animal Scientist, December 1, 2008; 24(6): 507 - 529. [Abstract] [PDF]
|
|
|
|
 |
|
 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]
|
|
|
|
|
|
L. O. Tedeschi, S. Seo, D. G. Fox, and R. Ruiz Accounting for Energy and Protein Reserve Changes in Predicting Diet-Allowable Milk Production in Cattle J Dairy Sci, December 1, 2006; 89(12): 4795 - 4807. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Ellis, F. Qiao, and J. P. Cant Evaluation of Net Energy Expenditures of Dairy Cows According to Body Weight Changes over a Full Lactation J Dairy Sci, May 1, 2006; 89(5): 1546 - 1557. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. L. Ellis, F. Qiao, and J. P. Cant Prediction of Dry Matter Intake Throughout Lactation in a Dynamic Model of Dairy Cow Performance J Dairy Sci, May 1, 2006; 89(5): 1558 - 1570. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Shah and M. R. Murphy Development and Evaluation of Models to Predict the Feed Intake of Dairy Cows in Early Lactation J Dairy Sci, January 1, 2006; 89(1): 294 - 306. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Kokkonen, J. Taponen, T. Anttila, L. Syrjala-Qvist, C. Delavaud, Y. Chilliard, M. Tuori, and A. T. Tesfa Effect of Body Fatness and Glucogenic Supplement on Lipid and Protein Mobilization and Plasma Leptin in Dairy Cows J Dairy Sci, March 1, 2005; 88(3): 1127 - 1141. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. P. L. Calus and R. F. Veerkamp Estimation of Environmental Sensitivity of Genetic Merit for Milk Production Traits Using a Random Regression Model J Dairy Sci, November 1, 2003; 86(11): 3756 - 3764. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
