Effects of milk replacer composition on gut and lung health and performance in veal calves

A. de Greeff, A.J.M. Jansman, E.M.F. Ruuls-van Stalle, S.A. Vastenhouw, D. Schokker, M.C.J. Smits, E. van der Wal, P. Mölder, N. Stockhofe

Research output: Chapter in Book/Report/Conference proceedingAbstract

Abstract

Negative energy balance (NEB) in dairy cows results from a fast increase in milk production post calving while feed intake is limited in this period. NEB is accompanied with an altered metabolic status, which triggers metabolic disorders. Metabolic status in early lactation is related with reproductive performance, e.g. reduced concentrations of insulin and IGF-I, which contributes to reduced follicular responsiveness to gonadotrophic stimulation, and thus prevents the dominant follicle to ovulate, resulting in a delay in the resumption of cyclicity. Omitting or shortening the dry period (DP), adjusting dietary energy level or feeding different dietary energy sources is of interest because that could minimize the risk of NEB, postpartum metabolic diseases and suboptimal fertility like delayed resumption of postpartum ovarian cyclicity. The aim of this study is to investigate the effect of DP length, dietary energy level, dietary energy source and interactions among these factors on fertility (resumption of ovarian cyclicity and days open) of dairy cows postpartum. Additionally, the relation between energy balance and metabolic status of dairy cows during early lactation and resumption of ovarian cyclicity and days open will be evaluated.
Original languageEnglish
Title of host publicationProceedings of the 17th International Conference on Production Diseases in Farm Animals
EditorsRupert M. Bruckmaier, Josef J. Gross
Place of PublicationBern, Switserland
PublisherUniversity of Bern
Pages224-224
ISBN (Print)9783906813936
Publication statusPublished - 2019
Event17th International Conference on Production Diseases in Farm Animals (ICPD) - Bern, Switzerland
Duration: 27 Jun 201929 Jun 2019

Conference

Conference17th International Conference on Production Diseases in Farm Animals (ICPD)
CountrySwitzerland
CityBern
Period27/06/1929/06/19

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