| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
1 Department of Animal Sciences,Purdue University, West Lafayette, IN 47906
2 Consolidated Nutrition L.C., Decatur, IN 46733
The objectives of the present study were to determine the effects of rumen undegradable protein (RUP) level of prepartum diets, the supplementation of a rumen-protected choline product, and their interactions on milk production, feed intake, body weight and condition, blood metabolites, and liver triacylglycerides in dairy cows. Rumen-protected choline (RPC) was fed with two levels of RUP to 48 multiparous Holstein cows in a 3 x 2 factorial arrangement of treatments. Beginning 28 d before expected calving, cows were fed 10% rumen degradable protein, either 0, 6, or 12 g/d of RPC as CapShure (Balchem Corp., Slate Hill, NY) and either 4.0 or 6.2% RUP. After calving and through 120 d of lactation, cows received a common diet and continued RPC as per their prepartum assignment. Prepartum dry matter intake (kg/d) was not affected by RPC or RUP. Postpartum intake decreased when 6.2% RUP was fed prepartum. Milk production to 56 d in milk was decreased when cows were fed 6.2% RUP prepartum. Milk protein (kg/d) decreased when additional RUP was fed prepartum. Cows fed RPC lost more weight during the study period and tended to lose more body condition. Plasma urea nitrogen levels in the prepartum period were reduced for cows fed 4.0% RUP prepartum. Mean liver triacylglyceride determined from samples obtained at –28, –14, +1, +28, and +56 d in milk was not affected by RPC, prepartum RUP, or their combinations. Feeding 12 g of RPC/d in conjunction with 4.0% RUP increased milk production, but feeding RPC with 6.2% RUP prepartum and through 56 d in milk decreased production. The data indicate that 6.2% RUP does not benefit close-up dry cows, and the response to RPC depends the RUP content of the prepartum diet.
Key Words: transition cows • rumen undegradable protein • prepartum diet • choline
Submitted on February 4, 2000
Accepted on May 25, 2000
This article has been cited by other articles:
|
|
 |
|
  R. F. Cooke, N. S. Del Rio, D. Z. Caraviello, S. J. Bertics, M. H. Ramos, and R. R. Grummer Supplemental Choline for Prevention and Alleviation of Fatty Liver in Dairy Cattle J Dairy Sci, May 1, 2007; 90(5): 2413 - 2418. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. C. Zahra, T. F. Duffield, K. E. Leslie, T. R. Overton, D. Putnam, and S. J. LeBlanc Effects of Rumen-Protected Choline and Monensin on Milk Production and Metabolism of Periparturient Dairy Cows J Dairy Sci, December 1, 2006; 89(12): 4808 - 4818. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
N. A. J. Guretzky, D. B. Carlson, J. E. Garrett, and J. K. Drackley Lipid Metabolite Profiles and Milk Production for Holstein and Jersey Cows Fed Rumen-Protected Choline During the Periparturient Period J Dairy Sci, January 1, 2006; 89(1): 188 - 200. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 D. J. Bindel, E. C. Titgemeyer, J. S. Drouillard, and S. E. Ives Effects of choline on blood metabolites associated with lipid metabolism and digestion by steers fed corn-based diets J Anim Sci, July 1, 2005; 83(7): 1625 - 1632. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. Bobe, J. W. Young, and D. C. Beitz Invited Review: Pathology, Etiology, Prevention, and Treatment of Fatty Liver in Dairy Cows J Dairy Sci, October 1, 2004; 87(10): 3105 - 3124. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. R. Overton and M. R. Waldron Nutritional Management of Transition Dairy Cows: Strategies to Optimize Metabolic Health J Dairy Sci, July 1, 2004; 87(13_suppl): E105 - 119. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. J. Phillips, T. L. Citron, J. S. Sage, K. A. Cummins, M. J. Cecava, and J. P. McNamara Adaptations in Body Muscle and Fat in Transition Dairy Cattle Fed Differing Amounts of Protein and Methionine Hydroxy Analog J Dairy Sci, November 1, 2003; 86(11): 3634 - 3647. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Piepenbrink and T. R. Overton Liver Metabolism and Production of Cows Fed Increasing Amounts of Rumen-Protected Choline During the Periparturient Period J Dairy Sci, May 1, 2003; 86(5): 1722 - 1733. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Hayirli, R. R. Grummer, E. V. Nordheim, and P. M. Crump Animal and Dietary Factors Affecting Feed Intake During the Prefresh Transition Period in Holsteins J Dairy Sci, December 1, 2002; 85(12): 3430 - 3443. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
