Effect of Hyssopus Officinalis, Virginiamycine and Aspirine on Growth Performance, Immunity, and Ascites Indexes of Broiler Chicken under Cold Stress

In this experiment, the effects of Hyssopus officinalis powder, Virginiamycine antibiotic and Aspirine on performance, immunity and ascites indexes of broiler chickens which subjected to cold stress were studied. In a completely randomized design, 500 male Ross-308 broiler chickens were allocated to 5 treatments with 5 replicates and 20 birds in each. The dietary treatments consisted of: 1) basal diet with no additive (control), 2 and 3) basal diet plus 300 g/tone Virginiamycine or Aspirine respectively and 4 and 5) basal diet containing 0.5 or 1 percent Hyssopus officinalis powder, respectively. As compared to control group, inclusion of 0.5 or 1 percent Hyssopus officinalis powder significantly increased feed intake, body weight gain and EPEF and improved FCR of broiler chickens. Feeding broiler chickens with diet containing Hyssopus officinalis powder or Aspirine decreased ascitic mortality, heamatocrite percentage and ascites indexe (relative weight of right ventricle to total weight of ventricles) at 42d of age. Dietary treatmens had no effect on antibody titer against New-Castle and influenza virus and relative weight of tymous, spleen and Burce of Fabrecoius of broiler chickens at 42d of age. Regards to the results of present experiment, addition of Hyssopus officinalis powder or Aspirine decreased ascytic incidence and its related mortality in broiler chickens under cold condition.