title: [Breed variations in feed intake and energy utilization in dairy cows].
abstract: In four experimental studies on feed intake, two completely mixed rations containing 0 and 50 per cent of concentrates respectively were fed ad lib. to dairy cattle of four different breeds: the Jersey, the Holstein-Friesian (HF), the Dutch Black-and-White (FH) and the Dutch Red-and-White (Meuse-Rhine-Yssel). There are considerable differences in feed intake between the breeds, particularly between the Jerseys and the heavier breeds (HF + MRY + FH). The experimental studies in the Jerseys showed that there was an interaction between breed and the composition of the feed, which is due to differences in nutrient requirements between breeds. These variations are attributable to differences in composition of the milk. The dairy breeds, Jersey and HF, use a large part of the energy taken up for milk production and a smaller part for maintenance than do the double-purpose breeds: FH and MRY.
authors.affiliation: Instituut voor Veeteeltkundig Onderzoek 'Schoonoord', Zeist.
authors.forename: J K
authors.initials: JK
authors.lastname: Oldenbroek
mesh_terms: D000821:Animal Feed; D000818:Animals; D002417:Cattle / Q000378:metabolism / Q000502:physiology*; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D013045:Species Specificity
vernacular_title: Rasverschillen in voeropname en energiebenutting bij melkkoeien.