Effect of using saturated and unsaturated fats in broiler diet on carsass performance

Abstract

In this work the effect of three types of fat substances based on the use of saturated fat (SF) and unsaturated fat (USF) and also mixing between them with different level proportions in the diet of broilers (Ross-308) chickens was investigated. The effect was observed on carcass yield, share of giblets and abdominal fat chicken part percentages. One-day old 800 chickens were divided to four testing groups C, T1, T2, and T3 and each group had 4 replications. The fattening was 42 days in length, divided to a diet’s pre-starter (7 d), starter (9 d), grower (17 d) and finisher (5 d). The testing group C had 5 % of animal fat, T1 2.5 % animal packed fat + 2.5 % sunflower oil, and T3 group 2.5 % packed fat +1.25 % rapeseed and 1.25% sunflower oil. Carcass yield was higher in group C (70.75 % and 70.17 % for female and male, respectively). The differences were not significant (P>0.05). The breast muscle percentage was not significantly higher in T3 (28.35 %) for female and also in T3 (29.46 %) for male, but it was with significant difference (P<0.05). No significant difference was observed in legs muscle between sex and groups (P>0.05). Abdominal fat was significantly lower in group T2 for female (1.036 %), while it was not significant in case of male (T3 - 0.66 %) as compared to C group.