EFFECT OF DIFFERENT FEED ADDITIVES OF OPTIFEED, OLEOBIOTEC AND VEO PREMIUM ON THE PRODUCTIVE PERFORMANCE OF BROILERS UNDER HEAT STRESS CONDITIONS IN DOHUK GOVERNORATE

This study was conducted at the University of Duhok, College of Agricultural Engineering Sciences, Animal Production Department. , to estimate the effect of different programs of adding the phytogenic (Optifeed, Oleobiotec and Veo premium) which are nutritional plant materials that have ability to improve the productive performance of broiler, and that in the phases of broiler feeding: starter, grower , finisher and for the whole period of the experiment, as well as, carcass characteristics and economic efficiency at 35 days of age. 1440 one-day old chicks were distributed to five groups with six replicates for each group (48 chicks/replicate). Adding dietary phytogenic materials significantly (P<0.05) improved broiler performance at grower, finisher and during whole experimental period (35) days compared to control. Regarding the carcass characteristics and internal organs, all treatments significantly (P<0.01) increased dressing percentage compared to control group (basal diet), while all other carcass characteristics and internal organs did not significantly affected by phytogenic dietary supplementation. Concerning economic efficiency, all phytogenic dietary supplementation resulted in improved profit compared to the basal diet.