الفهرس 
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Abstract
Alleviation Of Heat Stress On Sheep Using Some Feed Additives
The study was conducted at the Animal Production Farm - Faculty of Agriculture - Minia University during summer months (June, July and August) 2014, using 30 Ossimi growing lambs (15 males, 15 females) ) averages 16.64 kg of body weight and 3 months of age.The animals were randomly allocated into five equal groups (6 lambs each The experiment lasted for 3 months. The first month was followed by the following measurements: Temperature, humidity, THI, rectal temperature, respiratory rate, red and white blood cells, volume of cellular components, total protein, albumin, globulin, glucose, cholesterol, urea , Liver enzyme (ALT) and thyroxine (T4) hormoneThe averages of THI values indicated that the experimental lambs were exposed to extreme sever heat stress during hot summer conditions.
The averages of RT were significantly decreased for (T1), (T2) when compared control, (T3) and the combined treatment
The averages of RR were decreased significantly for lambs received T1 and T3 when compared with control, T2 and T4.
The averages of RR tended to decrease, but non-significant, for lambs received T2 and T4 compared of control.
Sex and the interaction between treatments and sex had no significant effect on RT and RR
The averages of RBCs were significantly increased for (T1) when compared with control, vitamin C (T2), yeast (T3) and the combined treatment
The averages of WBC and PCV were significantly increased for (T1), (T2), (T3) and the combined treatment when compared with control.
Sex and the interaction between treatments and sex had no significant effect on the averages of (RBCs, WBC and PCV).
total protein, albumin, globulin and glucose were significantly increased for (T1), (T2), (T3) and the combined treatment compared to control
total protein and albumin were significantly higher with male than female, while globulin and glucose were not significantly affected by sex.
total cholesterol, urea and ALT were significantly decreased for T1, T2, T3 and T4 compared to control
cholesterol were not significantly affected by sex. Meanwhile, urea were lower with male than female. However, ALT significantly increased for male compared to female.
The results showed significant increases in thyroxin (T4) for (T1), (T2), (T3) and the combined treatment compared to control.
Sex and the interaction between treatments and sex had no significant effect on the averages of thyroxin.