الفهرس 
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Abstract
The current study was carried out to investigate the effect of supplemental two levels of ME in the diet, as a biological treatment, on growth performance, digestibility coefficients, blood parameters and carcass traits of growing rabbits. A total number of 45 growing rabbits (7 wk of age) was divided into three groups (15 in each, 9 females and 6 males) with five replicates for each group. Rabbits in all experimental groups were fed the same basal diet (20% CP and 2832 Kcal/ kg).
Rabbits in the 1st group (control) were fed the basal diet without treatment, while those in the 2nd and 3rd groups were fed the basal diet treated with effective microorganisms at levels of 1 and 2% EM, respectively. The feeding period was from 7 to15 weeks of age.
The obtained results could be summarized as the following:
- Both levels ( 1 or 1.5%) of EM slightly increased contents of OM and NFE, and decreased EE and ash contents in diet of rabbits.
- Treatment with 1.5% EM increased CP and decreased CF contents, increased (P<0.05) final LBW and total weight gain, decreased (P>0.05) feed intake and improved (P<0.05) feed conversion ratio as compared to the controls.
- Digestion coefficients of all nutrients improved by both levels of dietary EM, being significant (P<0.05) only on CP, EE and NFE.
- Concentrations of total protein (TP), albumin (AL), globulin (GL) and glucose as well as activity of AST increased (P<0.05) in blood serum were the highest (P<0.01), while activity of ALT was the lowest (P<0.05) in 1.5% EM treatment.