The main target of current study was evaluated effect of incorporation of treated lemon pulp by Saccharomyces cerevisiae yeast (LPT) in growing rabbit diets on productive performance, antioxidant enzyme and immune response. Forty eight cross bred (New Zealand White (NZW) X California), 6 weeks age with live body weight ranging from 730.00 to 733.30g were divided into four experimental diet groups (twelve rabbits in each). Each treatment group was replicate six times and each replicates (2 rabbits in each replicate). These were divided into basal diet without LPT as a control group, while 3%, 6% and 9%LPT (replacement basal diet protein by three different levels of LPT protein) as the second, third, and fourth group, respectively. The results showed no significant differences in final body weight (FBW, g), daily body weight gain [BWG (g/rabbit/day)], daily feed intake [FI (g/rabbit/day)] and feed conversion ratio [FCR, g feed/g gain] were observed among rabbit groups and control group. Moreover, no significant differences were observed in DM, OM, CP, CF, EE, NFE% digestibility and nutritive value among experimental groups. The total lipid (TL) value increased (P≤0.05) with rabbits fed 3and 6%LPT diets groups when compared to control and 9%LPT diets. While increasing LPT up to 9% decreased (P≤0.05) the concentrate of cholesterol and triglycerides in experimental groups as compared to control group. The lowest (P≤0.05) value of aspartate aminotransferase (AST) was observed with 6%LPT group when compared to control and 3% treated groups. The alanine aminotransferase (ALT) decreased (P≤0.05) with 6% LPT group when compared to 3 and 9% LPT dietary groups, while, no significant differences between treated groups and control group. The rabbit fed Net revenue 1 =A-B Economical efficiency (%) 2 = (Net revenue / B) X 100. Conclusively, according the experiment results, using of treated lemon pulp with yeast in growing rabbit diets up to 9% (replacing of lemon pulp treated with yeast protein by basal diet protein) could be possible without any adverse effects on performance, digestibility and nutritive value. Also, utilization of LPT in growing rabbit diets could be improvement of total antioxidant enzyme and immune response.
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