SHORT COMMUNICATION
Effect of forage/concentrate ratio and oil
supplementation on C18:1 and CLA isomers in milk
fat from Sarda ewes
1
Dipartimento di Scienze Zootecniche, Università di Firenze, Italy
2
D.A.G.A.- Sezione Scienze Zootecniche, Università di Pisa, Italy
3
Dipartimento di Biologia Sperimentale, Università di Cagliari, Italy
Publication date: 2004-08-30
Corresponding author
J. Anim. Feed Sci. 2004;13(Suppl. 1):669-672
KEYWORDS
ABSTRACT
Sixteen lactating Sarda ewes were fed 4 diets differing in the forage/concentrate ratio (2 diets
75/25, 2 diets 60/40, DM) and in soyabean oil supplementation (2 diets with 100 g/head/d oil, 2
diets with no oil), in a 4x4 Latin square design. The inclusion of soyabean oil in the diet resulted in
a significant increase of both rumenic acid (cis 9 trans, 11 CLA) and vaccenic acid (trans 11 C18:1) in
milk fat, with higher increases with the 2 high forage diets. The 2 low forage diets allowed increases
of trans 10 C
18:1 and of trans 10, cis 12 CLA, probably due to a shift of rumen biohydrogenation of
linoleic acid.
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