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Effect of feeding rich linoleic acid sources on conjugated linoleic acid in buffalo milk [2011]
El-Sherbiny, M.A.M.; Cairo Univ., Giza (EGY). Fac. of Agric. [Corporate Author]
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Conjugated linoleic acid (CLA), a naturally occurring anticarcinogen found in dairy products, is an intermediary product of ruminal biohydrogenation of polyunsaturated fatty acids. The aim of the present study was to determine the effect of different dietary oils supplementation, which vary in fatty acid composition, on CLA concentrations in milk of lactating buffaloes. Eight Egyptian lactating buffaloes were assigned randomly into four groups (two animals / each group) using 4x4 Latin square design. Each experimental period lasted for 3 weeks. In each period, buffaloes of each group were fed the same basal diet and received one of the following treatments; [Control] basal diet (without oil), [OO] control diet.+ 2% olive oil (OO), [SFO] control diet + 2% sunflower oil (SFO), [OM] control diet + 1% SFO + 1% OO. All oils supplements were calculated on DM basis then mixed with the concentrate feed mixture. The nutrient digestion coefficients results showed a significant (P0.05) increase in digestion coefficients of OM, CP, EE and NFE among treatments compared to control. All the nutrients digestibility coefficients of buffaloes fed on diet supplemented with plant oils were slightly higher except for DM and fiber digestibility. compared to control. Results obtained indicated that milk yield were significantly different among treatment, while 4% fat corrected milk was not significantly different among treatments. Milk total solids % and total protein % were not
significantly different among treatments, milk fat % were significantly lower in OO compared to control. Milk saturated fatty acids were significantly lower compared to the control group, while unsaturated fatty acids significantly increased compared to the control group. All plant oils diets resulted in higher milk fat cis-9, trans-II CLA contents by 2-4 times higher compared to control; differences among groups were significant (P0.05). Blood plasma parameters were all in the normal range
