استعمال المعزز الحيوي العراقي لزيادة الوزن و كفاءة التحويل الغذائي للأغنام العواسية و بأعمار مختلفة

الملخص EN

The present study was conducted in the field of animal production department – college of agriculture – Kufa university during the period between 15/3 to 30/4,2009,using 24awassi ewes from expermintal herd to find out the effect of 2kg/ton feed and 4 Kg/ton feed from Iraqi propiotic to sheep rations contains ground corn cobs .Experemintal animals were devided into three groups according age 3 , 4 and 5 or more years old .Results showed asignificant effect ( p<0.05) of treatment 4 Kg/ton feed on daily gain ,total weight gain and feed efficiency for all age stages comparing with the treatment 2kg / ton feed.

Also the study also indicated that the best interaction of age with propiotic ratio was4kg / ton feed at three years of age for all previous traits studied.Which were 175.76 gm , 7.91 kg and 5.03 kg feed / kg for live body weight respectively, while the least interaction was 2kg / ton feed at five years of old or more .There were 91.34 gm , 4.11 kg and 7.92 kg feed / kg for live body weight respectively.