Effects of solid feed intake on nutrient utilisation from milk replacer in veal calves

Research output: Chapter in Book/Report/Conference proceedingAbstract

Abstract

This study was designed to assess the effects of solid feed (SF) supplementation on utilisation of macronutrients derived from milk replacer (MR) in veal calves. Thirty-two male Holstein-Friesian calves were randomly assigned to pairs, and each pair of calves was assigned to one of two levels of SF allowance: 9 or 27 g DM SF/kg0.75 per d. The SF consisted of 80% low-protein concentrates, 10% chopped wheat straw and 10% corn silage based on DM. MR was partly exchanged for SF (as 1:1.7) to achieve similar growth rates across treatments. In four experimental periods, each pair of calves was measured with or without supplementation of lactose, fat or protein (189 kJ extra digestible energy per kg0.75 per d). A higher level of SF intake did not affect energy utilisation for
growth, but increased methane production and urinary energy excretion in calves. Utilisation of digestible nitrogen for growth increased from 53 to 63% with increasing SF level. Supplementation of protein increased nitrogen retention, but the efficiency of digestible nitrogen utilisation for growth
decreased. Supplementation of lactose increased digestible nitrogen utilisation for growth by 6 (high SF) to 10% (low SF). The incremental efficiencies of metabolisable energy utilisation for growth were similar for fat (73%) and lactose (74%), whereas the incremental energetic efficiency for protein
was 39%. In conclusion, the level of SF intake does not affect energy utilisation, but greater intake of low-protein SF and also lactose supplementation increase the efficiency of protein utilisation for growth in veal calves.
Original languageEnglish
Title of host publicationEnergy and protein metabolism and nutrition
EditorsJacek Skomiał, Hélène Lapierre
PublisherWageningen Academic Publishers
Pages89-90
ISBN (Electronic)9789086868322
ISBN (Print)9789086862863
Publication statusPublished - 12 Sep 2016
Event5th EAAP International Symposium on Energy and Protein Metabolism - Krakow, Krakow, Poland
Duration: 12 Sep 201615 Sep 2016

Publication series

NameEAAP publication
Number137
ISSN (Print)0071-2477

Conference

Conference5th EAAP International Symposium on Energy and Protein Metabolism
CountryPoland
CityKrakow
Period12/09/1615/09/16

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