HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Wiltbank, J. N. Articles by Koch, R. M. Search for Related Content PubMed Articles by Wiltbank, J. N. Articles by Koch, R. M.

Effect of Energy Level on Reproductive Phenomena of Mature Hereford Cows^{1, 2, 3,}

U. S. Department of Agriculture Fort Robinson Beef Cattle Research Station, Crawford, Nebraska and Nebraska Agricultural Experiment Station

Abstract

The effect of level of energy on reproductive performance in mature Hereford cows was studied. Two levels of energy, 9 lb. of TDN per head daily (high) and 4.S lb. of TDN per head daily (low) were fed prior to calving. Following calving one-half the cows on the high ration and one-half on the low ration received 16.0 lb. of TDN per head daily (high-high and low-high). The remainder of the cows received 8.0 lb. of TDN per head daily (high-low and low-low). Results indicate that level of energy can markedly influence reproduction in the mature beef cow suckling a calf. The proportion of cows diagnosed pregnant during the experiment was 95%, 77%, 95% and 20% for cows fed the high-high ration, high-low ration, low-high ration and low-low ration, respectively. The difference among these groups was largely the result of a larger proportion of cows failing to show estrus on the low energy level after calving.

¹ The technical assistance of D. G. Le Fever in conducting this study is gratefully acknowledged.

² Published with the approval of the Director as Paper No. 1131, Journal Series, Nebraska Agricultural Experiment Station.

³ Contribution from the North Central Regional Project NC-1, Improvement of Beef Cattle through Breeding Methods.

This article has been cited by other articles:

				C. L. Engel, H. H. Patterson, and G. A. Perry Effect of dried corn distillers grains plus solubles compared with soybean hulls, in late gestation heifer diets, on animal and reproductive performance J Anim Sci, July 1, 2008; 86(7): 1697 - 1708. [Abstract] [Full Text] [PDF]

				S. L. Lake, E. J. Scholljegerdes, R. L. Atkinson, V. Nayigihugu, S. I. Paisley, D. C. Rule, G. E. Moss, T. J. Robinson, and B. W. Hess Body condition score at parturition and postpartum supplemental fat effects on cow and calf performance J Anim Sci, December 1, 2005; 83(12): 2908 - 2917. [Abstract] [Full Text] [PDF]

				H. C. Freetly, C. L. Ferrell, and T. G. Jenkins Nutritionally altering weight gain patterns of pregnant heifers and young cows changes the time that feed resources are offered without any differences in production J Anim Sci, April 1, 2005; 83(4): 916 - 926. [Abstract] [Full Text] [PDF]

				F. M. Rhodes, S. McDougall, C. R. Burke, G. A. Verkerk, and K. L. Macmillan Invited Review: Treatment of Cows with an Extended Postpartum Anestrous Interval J Dairy Sci, June 1, 2003; 86(6): 1876 - 1894. [Abstract] [Full Text] [PDF]

				R. P. Wettemann, C. A. Lents, N. H. Ciccioli, F. J. White, and I. Rubio Nutritional- and suckling-mediated anovulation in beef cows J Anim Sci, February 1, 2003; 81(14_suppl_2): E48 - 59. [Abstract] [Full Text] [PDF]