Effects of processing method on intake, milk yield and milk fatty acid pattern when feeding cows linseed-enriched concentrate feeds

A. Elgersma, J. Brok, S. Tamminga

Research output: Chapter in Book/Report/Conference proceedingAbstract

Abstract

EFFECTS OF PROCESSING METHOD ON INTAKE, MILK YIELD AND MILK FATTY ACID PATTERN WHEN FEEDING COWS LINSEED-ENRICHED CONCENTRATE FEEDS Anjo Elgersma1, Jeroen Brok2, Seerp Tamminga2 1Independent scientist, PO Box 323, 6700 AH Wageningen, The Netherlands 2Animal Sciences Group, Wageningen University, The Netherlands The fatty acid pattern of cows' milk fluctuates throughout the year in systems where fresh forage is fed. Dairy companies aim for delivery of milk with a more stable fatty acid profile. Linseed contains a high content of alpha-linolenic acid and could be a substitute for fresh grass in periods when this is not available. Linseed in dairy cow rations can increase the concentration of unsaturated fatty acid in milk, e.g. conjugated linoleic acid (CLA), but the processing method of linseed into concentrate feed may affect milk composition. Feed processing could also influence palatability and hence intake and milk production. The aims were (i) to test the effects of linseed-based concentrate versus standard concentrate feed as control (C) in dairy cow rations on intake, milk production, milk composition and milk fatty acid profile, and (ii) to compare two feed processing methods: extrusion (Extr) and BOA compactor (BOA). Fifteen dairy cows were individually housed and received grass silage, maize silage, 1 kg of standard concentrate plus 4 kg of either C, Extr or BOA concentrate. Cows were fed and milked twice daily. Three groups of 5 cows received the 3 concentrates in varying order during 14 days each, in a Latin Square design. Intake was recorded and pooled milk samples were analysed. Milk production and yields of milk fat and protein were not affected by treatments. Forage intake declined when linseed-enriched concentrate was fed. Concentrate intake and total intake were lowest with Extr, due to unpalatability. Linseed addition increased the unsaturated fatty acid level in milk; the CLA content was highest when feeding Extr concentrate feeds. Keywords: linseed, extrusion, concentrate, intake, cow milk composition, fatty acids
Original languageEnglish
Title of host publicationProceedings of the XV International Feed Technology Symposium "FEED-TO-FOOD", 03-05 October 2012, Novi Sad, Serbia
EditorsJ. Levic, S. Sredanovic, O. Duragic, B. Kokic
Place of PublicationNovi Sad, Serbia
PublisherUniversity of Novi Sad
Pages25-25
Publication statusPublished - 2012
EventVX International Feed Technology Symposium Feed-To-Food / COST feed for health joint workshop, Novi Sad, Serbia -
Duration: 3 Oct 20125 Oct 2012

Workshop

WorkshopVX International Feed Technology Symposium Feed-To-Food / COST feed for health joint workshop, Novi Sad, Serbia
Period3/10/125/10/12

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