The effect of protected fat on milk yield and composition, digestibility and some biochemical parameters in low producing cows [electronic resource].

Includes references.

Five successive feeding trials, each of 21 days, were performed on ten multiparous hybrid cows, as a group, to study the effect of supplemental dietary fat on yield of milk and its fat content in addition to some biochemical parameters. Rumen-inert fat in the form of Ca salts of fatty acids was added to a basal control diet in trials 2 & 4 at the rate of 400 g per cow daily, forming the fat-supplemented diet. In the other 3 trials (1,3&5) a control diet of 14% CP and 1.52 Meal, NE₁/Kg DM was fed without fat addition. The results showed that fat adding had no negative effect on DM intake, digestibility and characteristics of ruminal fermentation except in trial 2 the first time of fat addition. There was a significant increase in serum total cholesterol and HDL-cholesterol in fat supplemented groups. A highly elevated level of serum triglycerides was observed, leading to increase in milk fat%.

Summary in Arabic.