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United States Department of Agriculture

Agricultural Research Service

Title: Effect of Increasing Levels of Undegradable Intake Protein on Metabolic and Endocrine Factors in Cycling Beef Heifers

Authors
item Kane, K - NEW MEXICO STATE UNIV
item Hawkins, D - NEW MEXICO STATE UNIV
item Pulsipher, G - NEW MEXICO STATE UNIV
item Denniston, D - NEW MEXICO STATE UNIV
item Krehbiel, C - NEW MEXICO STATE UNIV
item Thomas, M - NEW MEXICO STATE UNIV
item Petersen, M - NEW MEXICO STATE UNIV
item Hallford, D - NEW MEXICO STATE UNIV
item Remmenga, M - NEW MEXICO STATE UNIV
item Roberts, Andrew
item Keisler, D - UNIV MISSOURI-COLUMBIA

Submitted to: Journal of Animal Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: September 24, 2003
Publication Date: January 15, 2004
Citation: KANE, K.K., HAWKINS, D.E., PULSIPHER, G.D., DENNISTON, D.J., KREHBIEL, C.R., THOMAS, M.G., PETERSEN, M.K., HALLFORD, D.M., REMMENGA, M.D., ROBERTS, A.J., KEISLER, D.H. EFFECT OF INCREASING LEVELS OF UNDEGRADABLE INTAKE PROTEIN ON METABOLIC AND ENDOCRINE FACTORS IN CYCLING BEEF HEIFERS. JOURNAL OF ANIMAL SCIENCE. 82:283-291. 2004.

Interpretive Summary: Undegradable intake protein supplementation has been reported to enhance reproductive performance in beef females by minimizing BW changes, hastening the onset of puberty, decreasing postpartum anestrus, and increasing pregnancy rates in cattle consuming dormant forage. However, high levels of undegradable intake protein have also been associated with impaired fertility in both beef and dairy cattle. The regulatory role undegradable protein supplementation has on reproductive function in beef cattle remains unclear and further work is needed to establish the mechanisms involved in nutritional modulation of reproduction. Present research indicates that alterations in reproductive performance with undegradable intake protein supplementation in beef cattle may be associated with changes in anterior pituitary gland synthesis, storage, and secretion of gonadotropins and(or) ovarian follicular dynamics.

Technical Abstract:

Last Modified: 7/24/2014
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