PMID: 20629213Jul 16, 2010Paper

Management of dry and transition cows to improve energy balance and reproduction

The Journal of Reproduction and Development
R R GrummerNoelia Silva-Del-Rio

Abstract

Fertility of dairy cows has decreased for the past several decades. Measures of energy balance (EB; e.g., change in EB, EB nadir, cumulative negative EB, or duration of negative EB) are related to reproductive performance. Our research group has concluded that modification of diets fed during the dry or transition period are unlikely to have significant effects on postpartum EB and fertility. Rather, more radical alterations in dairy management are needed if energy status of postpartum cows is to be improved. We have examined the potential to alter EB by shortening or eliminating the dry period. In an initial study, the effects of a 56, 28, and 0 d dry period on ovarian dynamics and reproductive performance of dairy cows were examined. Postpartum EB was improved by reducing the dry period; however, only significantly for the 0 d dry period. Cows on the 0 d dry period did not experience negative EB. Improvements in EB were a reflection of lower milk production and greater feed intake. Consistent with the improvements in EB, time to first ovulation and first service, first service conception rate, services per conception, and days open were all improved by reduction of dry period length. Because small animal numbers were used in ...Continue Reading

References

Jun 22, 2001·Journal of Dairy Science·M C Lucy
Feb 28, 2002·Journal of Dairy Science·S P WashburnA J McAllister
Oct 9, 2004·The Veterinary Clinics of North America. Food Animal Practice·Ric R GrummerA Hayirli
Jun 3, 2006·Veterinary Immunology and Immunopathology·D S HammonJ L Walters
Jun 22, 2007·Journal of Dairy Science·J M HuzzeyM A G von Keyserlingk
Jun 21, 2008·Journal of Dairy Science·R D WattersR R Grummer
Jun 17, 2009·Journal of Dairy Science·R D WattersR R Grummer

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Citations

Mar 23, 2012·Animal : an International Journal of Animal Bioscience·K Plaut, T Casey
Mar 15, 2014·The Veterinary Quarterly·E MartignaniM Baratta
Nov 7, 2016·Journal of Dairy Science·A KokI J M de Boer
Nov 24, 2016·Animal Science Journal = Nihon Chikusan Gakkaihō·Ahmad SofyanShiro Kushibiki
Jan 1, 2016·Reproduction, Fertility, and Development·Roberto SartoriMilo C Wiltbank
Feb 13, 2019·Asian-Australasian Journal of Animal Sciences·Wenming HuangZhijun Cao

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