Impact of different forms of oils on productive performance and conjugated linoleic acid content in goat's milk [electronic resource].

Includes references.

This work aimed to investigate the effect of supplementing different forms of plant oils (oils or oil seeds) to lactating goat's diet on milk yield and milk composition .Eighteen Demishki lactating goats of 2-3 years old and live body weight of about 38-42 Kg were divided into three blocks (6 animals each) inside each block there are three experimental rations except first block contained only one ration (R1) (control). The second block included R2, R3 and R4 rations (oil seeds block) while, the third block included R5, R6 and R7 rations (oils block). Animals in all treatments were received 3.5 %(oils or seeds and the amount of seeds contained 3.5% oil) over requirement. Results indicated that supplementation of oil seeds increased milk yield as fat corrected milk (FCM) and the highest FCM (2.48 kg/h/d.) was recorded with SFS (sunflower seeds) group. There was a decrease in milk fat of goats fed either R3 or R4 compared with those fed R1. Also. goats fed R5 recorded the lowest protein content (2.47%) compared with control. Supplementation oil seeds and oils in goat's rations slightly reduced the apparent digestibility of CFD compared with control. The different forms of oil seed did not inlluence ruminal pH but it caused significant (P<0.05) decrease in ruminal ammonia concentrations for all groups compared with control. While, the Goncentration of ruminal volatile fatty acids was insignificantly (P<0.05) differ for all goats except those fed rations R3 and R4 compared with control.

Summary in Arabic.

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