effects of tarragon powders’ different levels (artemisia dracunculus) on performance and carcasses ‘characteristics male broiler chickens

this study was designed to investigate the effects of different levels of tarragon powder on performance and carcass’ characteristics of broiler chickens. 200 one-day-old ross 308 male broiler chickens in a completely randomized design with 4 treatments and 5 replicates per treatment and 10 birds in each replicate were used. experimental diets were set on the basis of corn-soy-wheat and ross 308 broiler chickens nutritional requirements tables by the use of uffda ration formulation software for each of the (1-21 days) and (22-42 days) period. treatments were: base diet (control), base diet + 0.125% of tarragon powder, base diet + 0.25% of tarragon powder, base diet + 0.5% of tarragon powder.the results of experiment showed that experimental dietaries caused no significant difference between the feed intake of different treatments statistically (p>0.05). the consumption of experimental rations increased body weight in control treatment and 0.125% tarragon treatment when compared with powder 0.5%tarragon powder treatments in 1-21 days old (p