Effect of replacing dietary calcium carbonate with carbonation mud on performance and calcium and phosphorus deposition of tibia bone in broiler chickens

This experiment was carried out to evaluate the effect of four substitution levels of 0, 33, 66 and 100% of dietary calcium carbonate with carbonation mud of sugar beet using pelleted or mash diets on performance and calcium and phosphorus deposition in tibia of broiler chickens. The statistical model of project was a two-factor factorial design in a completely randomized design. The trial lasted 42 days and the chickens had free access to water and feed. The results indicated that means of daily feed intake, daily gain and body weight of pelleted diets compared to mash diets for all the levels of substitution was significant (P<0.05), and the best feed conversion ratio was belonging to zero substitution level of pelleted diets that was significantly different with other treatments (P<0.05). Carcass yield, abdominal fat, proventriculus and ceca percentages of pelleted diets were not significantly different with mash diets but Gizzard percentage of pelleted diets was significantly less than mash diets and liver and intestines percentages were significantly more than mash diets (P<0.05). Ash, calcium and phosphorus percentages of tibia in pelleted diets had not significantly different with mash diets although the 33% substitution level of pelleted diets had the highest phosphorus percentage compared to other treatments (P<0.05). In general, the results showed that pelleted diets including carbonation mud had better performance than mash diets and did not have significant effect on calcium and phosphorus deposition of tibia in broiler chickens.