الفهرس 
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Abstract
An experiment was conducted to study the effect of Nigella sativa oil seed meal incorporation with or without Avizyme supplementation on growth performance, carcass characteristics, blood parameters and digestibility trials of growing Japanese quail. A 4x2 factorial design experiment was carried out including four levels of Nigella sativa oil seed meal (NSOM) (0, 10, 15 and 20% in the diet) and two levels of supplemented Avizyme (0.0 or 0.50 g/kg diet). A total number of 360 unsexed one week old quail chicks, were randomly distributed into eight treatment groups of 45 chicks, each with three replicates (15 chicks each). Results obtained showed that, chicks fed diets containing NSOM up to 15% significantly (P<0.01) improved live body weight at 6 weeks of age, body weight gain and feed intake during all the experimental studied periods (1-3, 3-6 and 1-6 weeks of age) as compared to the control group. Live body weight, feed intake and body weight gain were significantly (P<0.01) decreased in chicks fed diet containing 20% NSOM compared with control and other dietary treatment groups (10 or 15% NSOM). There was a marked significant (P<0.01) increase in economical efficiency values of growing Japanese quail fed diet containing 10 or 15% NSOM when compared with control or chicks fed 20% NSOM. All carcass traits studied including, dressing %, carcass % and giblets % were significantly (P<0.01) affected by feeding the NSOM diet. Most of blood parameters studied were significantly affected by dietary NSOM. Results of digestion coefficient traits were coincided generally with growth performance in which chicks fed 10 or 15% NSOM showed the highest growth performance compared to other treatments. In general, most of all studied traits were not significantly affected by Avizyme supplementation or the interaction between NSOM level and Avizyme supplementation.
Conclusively, it could be recommended to use Nigella sativa oil seed meal up to 15% without Avizyme supplementation in growing Japanese quail diets from 1-6 weeks of age, without any detrimental effects on growth performance.