Abstract
Heavy breed day-old chicks fed Isonitrogenous-Isocaloric diets supplemented with 0.0, 2.0 and 4.0% fresh bovine bile liquid, for three weeks. The three types of diets comprised the experimental dietary treatments, from which the effect of including bile liquid in heavy breed chicks diet on their most prominent economical traits were studied. Results showed that the three groups of birds, consumed almost the same amount of feed during the three weeks of experimental period. However, a significant increase in daily growth rate(DGR)occurred as a result of bile liquid in starter diets. The estimated superiority of this traits, DGR, was found to be 10.76% on an average basis, higher than that of the control group. A good reflection of this phenomenon on feed conversion ratio was observed, as birds fed diets contained 2.0 and 4.0% bile liquid surpassed the control group by 8.75 and 10.63%, respectively. Body weights at third week of age were 8.06 and 10.60% heavier for the two treated groups, respectively, than the control one. Results indicate that the nutritive value of starter diets supplemented with bile liquid warrant further investigation based on long term experiments to make a decision in this direction.
Highlights
A considerable number of bile salts have been found in animals, being principally conjugates with taurine of cholic acid and other acids
8.06 and 10.60% for chicks on treatments two and three, no significant differences between each one of the groups respectively. In this experiment that contained bile liquid in their diets and the control group, there was a constant trend for feed conversion ratio, FCR, during each of the experimental weeks, and on overall to be influenced by the presence or absence of bile liquid experimental period basis, as such
The earliest time at which heavy breed chicks were shown to benefit less than maximum amount of dietary lipid was at 1 to 4 weeks of age (4)
Summary
A considerable number of bile salts have been found in animals, being principally conjugates with taurine of cholic acid and other acids. On the other hand, (7) has extensively explained the role of many factors in contribution of energy to poultry by dietary fats They did focus on type of fat and age of birds being the most crucial factors affecting digestion and absorption of fatty acids from the intestinal tract. Stated by (8) young birds are less able to digest saturated fats and the digestibility of palmitic acid, for instance, increased by 50-85 % as bird aged from [14-56] days of age. They ascribed the case to less bile-salts production in young birds
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