Comparison of the Effect of Different Levels of Scenedesmus sp. Microalgae on Growth, Immune Response, Carcass Traits, and Some Blood Parameters of Broiler Chickens

A study was conducted to compare the effects of different levels of a suspension of Scenedesmus Microalgae (SM) on growth, immune response, carcass traits, and some blood parameters of broilers. Two hundred 1-d-old broiler chicks were randomly assigned to each of 5 dietary treatments. Treatments consisted of: T1 (100% drinking water), T2 (50% drinking water+50% SM), T3 (25% drinking water+75% SM), T4 (100% SM) and T5 [(Basal diet (BD) + 2.5 mg Virginamycin kg-1 diet)] with 4 replicate cages of 10 birds each. The birds receiving T3 and T4 had higher feed intake compared with the control and antibiotic groups at 1-10 days (P< 0.001). Water replacement by 100% SM increased body weight (P< 0.001) and reduced feed conversion ratio (P< 0.05) in broilers. Inclusion of 100% SM increased SRBC antibody titer in primary and secondary responses compared to that of the control group. (P< 0.05). The birds receiving T4 had lower serum content of triglycerides and cholesterol compared with the control group (P< 0.05). Chickens at the T4 group showed higher relative breast weight compared with the control group (P< 0.05). It was concluded that SM at the levels of 75 and 100% can improve growth performance, immune responses, and some blood parameters of broiler chicks.

Comparison of the Effect of Different Levels of Scenedesmus sp. Microalgae on Growth, Immune Response, Carcass Traits, and Some Blood Parameters of Broiler Chickens Keywords:

Body weight , Feed intake , Triglycerides concentration , Virginiamycin. , وزن بدن , جوجه , ایمنی , جابک سندسموس , ویرجینامایسین