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Open Access item Effect of diet supplementation with sunflower oil on milk production, fatty acid profile and ruminal fermentation in lactating dairy ewes
Mantecón, Ángel R.
Fuente, Miguel Ángel de la
|Keywords:||Conjugated linoleic acid, Fatty acid, Milk, Sheep, Vaccenic acid|
|Publisher:||Cambridge University Press|
|Citation:||Journal of Dairy Research, 2008, 75, 399-405|
|Abstract:||The aim of this research was to enhance the nutritional quality of ewe milk fat by
increasing potentially healthy fatty acids (FA) through diet supplementation with
unprotected oil rich in linoleic acid, and without detrimental effects on animal
performance. Twenty-four ewes were assigned to two high concentrate diets, control or
supplemented with 6 % sunflower oil (SO), for 4 weeks. No differences between
treatments were found in milk production and dry matter intake. Although the SO diet
increased milk fat percentage and tended to reduce milk protein concentration, it did not
affect milk fat, protein or total solid yield. Most of the modifications in milk FA
composition were addressed toward a potentially healthier profile: a decrease in C12:0
to C16:0 and a remarkable increase in the contents of cis-9 trans-11 C18:2 (from 0.94 to
3.60 g/100 g total FA) and trans-11 C18:1 (from 2.23 to 8.61 g/100 g total FA).
Furthermore, the reached levels were maintained throughout the period monitored.
However, the SO diet increased other trans C18:1 isomer percentages, too. The lack of
differences between treatments in the in vitro ruminal fermentation parameters, studied
with batch cultures of rumen microorganisms, would indicate no negative effects on
|Description:||The definitive version is availabe at: http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=2624044|
7 pages.-- Avalilable online 14 Jul 2008.
|Publisher version (URL):||http://dx.doi.org/10.1017/S0022029908003506|
|Appears in Collections:||(IGM) Artículos|
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