The Effects of Using Different Levels of Mannanoligosaccharides on the Performance, Carcass Characteristic and Blood Fat Profile of Broiler Chickens

Subject Areas : Journal of Crop Ecophysiology

M.  Afrouzie ¹ (Assistant prof., Department of Animal Science, Faculty of Agriculture, Tabriz Branch, Islamic Azad University. Tabriz, Iran)
B.  Golizadeh ² (Animal Science MSc. Student, Faculty of Agriculture, Shabestar Branch, Islamic Azad University, Shabestar, Iran)
A.  Manaf Hossaini ³ (Staff Member, Department of Animal Science, Faculty of Agriculture, Tabriz Branch, Islamic Azad University. Tabriz, Iran)

Received: 2010-06-23 Accepted : 2010-06-08 Published : 2010-08-23

Keywords: broiler chicken, carcass weight, Blood lipid, Mannanoligosaccharides,

Abstract :

A complete randomized experiment was conducted to study the effect of different levels of mannanoligosaccharides (0, 1, 2 and 3 g/kg into the basal diets) on growth performance, carcass characteristic and blood lipid profile in broiler chicks. Six hundred one day old Ross 308 broiler chicks were randomly assigned into 5 treatments. Each treatment consisted of 6 replicates and there were 20 chicks in each replicate. In this experiment, avilamicin antibiotic (10 mg/kg into the basal diet) was used as a positive control. The obtained in results starter period showed that, none of the growth performance parameters affected by adding prebiotic. Adding avilamicin also did not affect the parameters under study. By adding 2 and 3 g/kg prebiotic or avilamicin into basal diet weight gain improved as compared with control diet (P<0.05) and feed conversion ratio was significantly lower in diet supplemented by 3 g/kg prebiotic or avilamicin in comparison with control diet (P<0.05). In finisher period, supplementing 2 and 3 g/kg prebiotic or avilamicin to the diet at the final growth period improved feed conversion ratio and weight gain significantly (P<0.05) as compared with the control diet. Addition 2 and 3 g/kg prebiotic to the diet decreased abdominal fat pad (as a percentage of live weight) significantly as compared with control diet, but its difference with diet supplemented by avilamicin was not significant. Only, in diet supplemented by 3 g/kg prebiotic the level of serum cholesterol was lower as compared with control diet (P<0.05). It seems that the best levels of mannanoligosaccharides were 2 and 3 g/kg of broiler diets.