Effect of different levels of surplusJujube mealt with or without enzymes on performance, abdominal fat, blood lipids and liver enzyme activity of broiler chickens

Document Type : Research Paper

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To study the effects of different levels of surplus Jujube fruit (SJF) on growth performance parameters, carcass yield and some biochemical parameters, 320 Ross 308 broiler chicks were randomly divided into 8 treatments with 4 replicates and ten chicks each. The experimental design was completely randomized design based on 2×4 factorial trial using four levels of  jujube ( 0, 2.5 , 5 and 7.5 % ) and two enzyme levels ( 0 , 0.2 % ). The birds were fed dietary treatments from 10 to 42 d in growth (11- 24days) and finisher periods (25-42 days). Body weight and feed intake and feed conversion ratio (FCR) were determined at the end of grower and finisher period. Data analysis indicates that main effects of jujube were significantly lower in birds fed 25 g/kg diet SJF as compared to control. Feed intake, body weight, body weight gain and FCR did not affect the interactions between SJF and enzyme at 24 days and 42 days (P>0.05).  The birds fed 50 g/kg SJF had lower relative weight of pancreases and heart as compared to birds fed 25 g/kg SJF. The relative weight of liver and heart were affected by the interaction between Enzyme and SJF levels (P>0.05).The birds fed SJF had lower abdominal fat. The concentration of serum total cholesterol was decreased with increasing the levels of SJF. The concentration of triglycerides, HDL and LDL were not affectd by the levels of SJF or enzyme.The main effects of SJF at level of 50 g/kg were significantly reduced the activity of AST and ALT (liver enzymes) as compared to control diet. The 50g/kg of SJF were showed lower concentration of calcium as compared to 25 g/kg of jujube (P<0/05).Supplementation of enzyme to SJF based had not significant effects on performance or blood parameters. It is concluded that inclusion of SJF to broiler diets may be improve the percentage of abdominal fat, blood cholesterol without any side affect on performance parameters. The SJF may be increased the activity of liver enzyme in broilers.

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