الخلاصة

Twenty four Arrabi lambs were used (5-6 month of age and 27.13 kg average body weight) they were distributed randomly allocated to six equal groups to investigate the effect of adding Baker's yeasts and powder milk on some productive Performance for 60 days at Ruminants Field at Animal Resources Department – College of Agriculture- University of Kufa, Sacchromyses cervisiae( SC)with levels 0.2%, 0.4% and 0.6% were added to diets with or without 1% powder milk. Diets were offered as 4% of life body weight Results showed Significant increase (P<0.05) in final body weight with increasing levels with S.C. or S.C with milk until level 0.4% of adding Superiority was in treatment 3 ( 0.04% SC) with a significant different an lambs in treatment 1 ( 0.2%/SC and mathematically on lambs in treatment 5 (0.6% sc ). Total weight gain and daily weight gain there were a significant superiority in treatment 3 (0.4%) sc in total weight gain and daily weight gain .Results showed Significant increase (P<0.05) in feed conversion ratio and feed consumption with increasing levels with S.C. or S.C with milk until level 0.4% of adding Superiority was in treatment 4 ( 0.04% SC+ milk) ) lowest value whereas lambs in treatment 1 ( 0.2%SC) higest value in treatment 5 (0.6% SC ). The daily dry matter intake did not appear a significant differences in which mathematical increase with increasing levels with S.C. or S.C with milk until level 0.4% of adding.