Document Type : Original Article
Authors
1
Anim. Prod. Res. Instit., Agric. Res. Cent., Egypt
2
Rabbit Res. Department, Anim. Prod. Res. Inst., ARC, Ministry of Agric., Egypt.
3
Rabbit Res. Dept., Anim. Prod. Res. Ins., Agric. Res. Center, Egypt
4
Poult. Nut. Res. Dept., Anim. Prod. Res. Ins., Agric. Res. Center, Egypt
5
Anim. And Fish prod. Dept., Fac. Agric.(Saba Basha), Alex. Univ., Egypt
6
Poult. Prod. Dept., Fac. Agric., New Valley Univ., Egypt
Abstract
This study was done to determine the effects of Saccharomyces cerevisiae (Sc) and anaerobic bacteria enzymes (ZAD) supplementation in drinking water on weaned male rabbits growth and physiological responses. Sixty-four weaned Californian male rabbits at 35 days of age with an average initial weight of 561.08 ± 7.22 g were randomly distributed into eight experimental groups (8 each). The first group was received un-supplemented drinking water and served as a control (T1), the 2nd (T2), was received drinking water plus 1 ml of ZAD/l; the 3rd, 4th and 5th groups (T3, T4 and T5) were received drinking water plus 1, 2 and 3 g Sc/l; the 6th, 7th and 8th groups (T6, T7 and T8), were received drinking water plus 1 ml of ZAD/l (mix of enzymes and bacteria) and 1, 2 and 3 g Sc/l, respectively.
Results showed that the incorporation of yeast in rabbit drinking water at a level of 1 g/liter resulted in improvement in final body weight, body weight gain, feed conversion ratio, and protein efficiency vs. other groups and control, respectively. Digestibility were significantly enhanced by supplemented Sc and ZAD; conversely, blend yeast and ZAD decreased CP and CF digestibility compared with yeast or ZAD alone but improved compared with control. Rabbits supplemented with yeast or ZAD alone in drinking water recorded the highest carcass percent, while groups supplemented with yeast and ZAD combined recorded the lowest percent for all carcass parameters except liver percent. Data indicated that the total protein, albumin, globulin, AST and ALT concentrations of rabbit’s blood receiving yeast and anaerobic probiotic ZAD were high. While, T3 and T5 whose supplemented with yeast recorded high concentrations of TP, also T3 and T6 recorded a significant increase in Alb. Noteworthy, groups of T6, T7 and T8 (groups consumed water treated with combined of yeast and ZAD) recorded high concentrations of AST. A significant reduction in concentrations of TG, CH, HDL-c, V-LDL, urea, and creatinine in treated rabbits were noticed. At the same time, T3, T4, and T5 recorded lower values of CH and LDL-c but raised concentrations of HDL-c, while the control group recorded the highest values for all parameters except HDL-c. The concentrations of IgG and IgM were higher in rabbits consumed water with yeast. Supplemented drinking water for weaning rabbits with Saccharomyces cerevisiae and ZAD showed improved final body weight, net profit, net revenue and relative economic efficiency in groups treated individually compared with those receiving combination of Sc and ZAD in drinking water.
Conclusively, Saccharomyces cerevisiae (Sc) or anaerobic bacteria (ZAD) supplementation in weaned rabbits drinking water showed the most beneficial effects, while, the combinations between them resulted in adverse effects.
Keywords
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