title: Variables associated with peripartum traits in dairy cows. II. Interrelationships among disorders and their effects on intake of feed and on reproductive efficiency.
abstract: Daily individual voluntary intakes of dry matter (DM % of body weight) and estimated net energy (ENE, Mcal/100 kg) by 89 Holstein cows were compared between day 220 of gestation and day 30 postpartum over a 21-month period. The purpose was to compare effects of diet and health status (control vs. abnormal) on intakes of DM and ENE. The cows were fed either chopped hay, hay crop silage (HCS) or corn silage (CS). Compared to controls, voluntary intakes of DM and ENE were decreased (most to least) in cows with fat cow syndrome (FCS), parturient paresis (PP), mastitis (MST), retained fetal membranes-metritis (RFM-M), and displaced abomasum (DA) prepartum and FCS, DA, PP, RFM-M and MST peripartum. Cows fed hay had a lower incidence of RFM-M (28%) than cows fed HCS (57%) and CS (47%) as well as superior reproductive efficiency subsequently (89% conceived vs. 72% and 78%, respectively).
authors.affiliation: Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
authors.forename: C N
authors.initials: CN
authors.lastname: Zamet
authors.forename: V F
authors.initials: VF
authors.lastname: Colenbrander
authors.forename: R E
authors.initials: RE
authors.lastname: Erb
authors.forename: C J
authors.initials: CJ
authors.lastname: Callahan
authors.forename: B P
authors.initials: BP
authors.lastname: Chew
authors.forename: N J
authors.initials: NJ
authors.lastname: Moeller