|| ARTICLES | Volume 1, Issue 7, Pages 244-250 (September 2015)|
| Research Article
THE EFFECT OF DIETARY CALORIE TO PROTEIN RATIO ON BROILER PERFORMANCE AND SERUM-CARCASS LIPIDS
| Hamdeen yahia dawood | and | Omar El- Amin Mohammed |. American Journal of Innovative Research and Applied Sciences. 2015; 1(7):244-250.
| PDF FULL TEXT |
Background: The high growth rate that concomitant to the modern broiler strains result in high fat deposition in broiler chick carcasses which now are associated with human health problems. To produce lean meat we should consider factors that retard the broiler growth rate or carcass fat deposition which can achieved through various dietary manipulation methods (calorie to protein ratio). Objectives: This experiment was conducted to study the effect of caloric to protein ratio on the broiler performance, fat deposition and carcass characteristics in addition to cholesterol, triglycerides, and fatty acids of the abdominal fat pad, serum and carcass. Material and Methods: 90 unsexed day old commercial broiler chicks (Ross308) reared for six weeks in deep litter open house and assigned to three dietary treatments of different protein to calorie ratios: (23:3200 (1:139); 24:3170 (1:128); and 21: 3267 (1:154)) were examined. The experimental diets were randomly distributed among the experimental birds for the first three weeks of age then the birds on (1:128, or 1:154) diets were switched to a finisher diet (1:162) for the last three weeks while the birds on (1:139) were continued on the same diet. Results: the study showed that no significant effect on the overall broiler performance parameters, the impact of the calorie to protein ratio on carcass parameters was positive but insignificant. Moreover, the feed utilization efficiency of the broiler chicks was significantly improved by the calorie to protein ratio treatments. It provoked significant increase on liver, heart, and abdominal fat pad and thus induced a significant improve in carcass quality by depriving the body fat toward abdominal fat and blood serum. Calorie: protein ratio revealed no significant effect on cholesterol and triglycerides of carcass, serum or abdominal fat pad. Conclussion: calorie to protein ratio as a feed manipulation method is best way to produce lean broiler meat with special consideration given to widening energy to protein ratio approach which significantly increased deposition of cholesterol and triglycerides.
Key words: poultry, broiler, fat deposition, cholesterol, fatty acids.