الفهرس 
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Abstract
This study was carried out to study the effect of some natural feed additives such as onion powder, garlic powder, red pepper, and anise as natural feed additives on some productive and physiological response of Japanese quail chicks. A total number of 300 quail chicks one week old were randomly divided into 5 treatments groups (60) chicks each group was subdivided into 3 replicates of 20 chicks each. Birds fed 5 experimental dietary groups as follows:- the 1st group was fed on a basal diet without feed additives (control ), the 2nd group was fed on a basal diet supplemented with 0.5% onion powder, the 3rd group was fed on a basal diet supplemented with 0.5% garlic powder, the 4th group was fed on a basal diet supplemented with 0.5%hot pepper, and the 5th group was fed on a basal diet supplemented with 0.5% anise.
The experimental treatments started from 2 weeks old until 6 weeks of age, all diets and water were supplied ad-libtum. Live body weight and feed intake was recorded weekly during the experiment. Feed conversion (gm feed/gm gain) for each replicate within each week was calculated. After 4 weeks from beginning of the experiment, 6 chicks from each treatment were injected intravenously in brachial vein with 0.2 ml of 10 % suspension of sheep red blood cells to determine the activity of antibody. At the end of experiment (6 weeks of age), the injected birds from each treatment were selected, weighed and slaughtered after 12 hours of fasting. The internal organs (liver, heart, gizzard, proventiculus, spleen, thymus and bursa of fabricius) were collected, weighted. Relative weights were calculated during the experiment. Blood samples were collected in two tubes the first one was not heparinized tube and the second was contained heparin as an antic agglutination substance. The first one was taken for separating serum for the biological serum constituents: Liver functions) Total protein, Albumin, Globulin and Glucose), liver enzymes (AST, ALT), Triglycerides and Cholesterol Kidney function (creatinine, Urea and Uric acid) and some immunological studies. The second tube was taken for blood physical characteristics (RBC’s, PCV, Hb, and, white blood cells deferential count).
Obtained results declare that:
1- At the end of the experiment (6 weeks of age), there was a slightly numerically improvement (P<0.05) in body weight and body gain for birds fed dietary onion followed by quails fed dietary red pepper compared with other dietary treatments .
2- The greatest insignificant feed intake was recorded for birds fed dietary onion follow by dietary anise or garlic compared with birds fed other dietary groups.
3- The lowest (P<0.01) feed conversion ratio from period 3-4 weeks was found for birds fed dietary anise followed by birds fed dietary red pepper or onion.
4- The greatest insignificant (p>0.05) liver and edible proportions were recorded for birds fed dietary onion followed by garlic diet compared with other dietary groups. The lowest numerically proportion of some immunological organs (lymphoid) such as spleen and bursa were recorded for birds fed dietary garlic and anise respectively.
5- The worst insignificant mortality rate was for birds fed dietary garlic followed by others fed onion or control diets.
6- The greatest numerically improvement (P>0.05) in packed cell volume and MCV was recorded for birds fed dietary onion. Birds fed dietary anise presented the pest (P>0.05) values of MCH compared with other dietary treatments.
7- Birds fed dietary garlic and anise recorded the greatest (P<0.01) values of serum total immunoglobulin compared with all dietary groups.
8- Birds fed dietary onion recorded the best non-significant (P>0.05) values of serum total protein while, birds fed dietary garlic recorded the highest numerically (P>0.05) improvement in albumin / globulin ratio and glucose compared with other dietary groups.
9- Birds fed dietary onion showed the greatest numerically (P>0.05) values of ALT and Triglycerides compared with other groups. The lowest numerically (P>0.05) value of cholesterol was noticed for birds fed control diet and others fed dietary red pepper.
10- Birds fed dietary red pepper had the lowest value of creatinine compared with those fed other diets.
11- The data revealed that, birds received control diet had the highest economic and relative economic efficiency compared with other experimental groups.