الفهرس 
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Abstract
Twelve Ossimi sheep of about 45±0.5 kg live weight were used in the present study. Animals were randomly assigned among four experimental treatments. The experimental period extended to 12 days which divided to 7 days as an adaptation period followed by 5 days as a collection period. Animals were fed four experimental treatments:
1-T1(C): Rice Straw with Grown Barely (RSGB) without ZAD enzyme, without orange pulp (control, T1).
2-T2:RSGB with (ZAD), without orange pulp (Op) (T2).
3-T3:RSGB without (ZAD), with orange pulp (T3).
4-T4:RSGB with (ZAD), with orange pulp (T4).
The objective of this study was to study the possibility of feeding (RSGB) and the effect of biological treatments by using ZAD on the chemical composition, nutritive value, rumen fermentation and some blood parameters of Ossimi sheep. The results and conclusions are summarized as follow:
1.Feedintake and nutrient digestibility coefficients
1.1. The biological treatments (T4& T2) increased all nutrients digestibilities compared with control and T1.
1.2. There were no differences between experimental groups and control ration in DMI.
2. Nutritive value of the experimental rations
The biological treatments increased rations nutritive values compared with control and untreated group (T1).
3. Rumen parameters:
3.1. The groups fed on treated and untreated RSGB (T2, T3, T4) recorded slightly higher (p<0.05) rumen pH compared with control, however, differences among treatments were insignificant.
3.2. The untreated group (T3) and the biologically treated groups(T2 & T4) led recorded slightly higher (p<0.05) value of rumen total volatile fatty acids compared with T1group. Differences among treatments were insignificant.
3.3. Groups T4, T3 and T2 recorded higher (p<0.05) values of rumen liquor Ammonia-nitrogen compared with T1 group. Differences among treatments were insignificant.
3.4. All rumen parameters were significantly affected by sampling times.
4. Results of blood serum parameters.
4.1. RationsT2,T4 and T3 slightly increased (p<0.05) serum total protein compared with T1 ration.
4.5. The treated groups T2and T4 recorded slightly higher (p<0.05) serum urea compared with T1group.
4.6. T3 and T2groups recorded slightly (p<0.05) higher serum creatinine compared with T1 and T4groups.
4.7. All values of serum ALT for all groups were in normal range; where T1 ration increased (p<0.05) serum ALT compared with other rations.
4.8. All values of serum AST for all groups were in normal range. where T2 and control rations increased (p<0.05)serum AST compared with other rations.
4.10. Rations T2& T3 increased(p<0.05) serum total lipids compared with T1 ration.
CONCLUSION
Using of RSGB as a ruminant feed increased all nutrients digestibility, animal performance of Ossimi sheep. Feeding ration treated ZAD improved the performance of sheep without any adverse effect on animal’s health.