اثر افزودن سرکه سیب به آب مصرفی بر عملکرد رشد، pH محتویات گوارشی، جمعیت لاکتوباسیلوس ایلئوم و پاسخ ایمنی جوجه‌های گوشتی

An experiment was carried out to evaluate the effect of addition various levels of apple vinegar (zero, 1 and 2%) in drinking water on growth performance, gastrointestinal tract organs chyme pH, ileal lactobacillus population and immune responses of broiler chickens. One hundred and sixty day old male Ross 308 broiler chicks were allotted in a completely randomized design with three treatments, five replicates/treatment and 11 chicks/replicate. The study lasted from one to 42 days of age. The results showed that supplementation of drinking water with apple vinegar significantly (P<0.05) reduced feed intake and feed conversion ratio during the starter and grower periods (1-10 &11-24 days of ages) but on other growth performance traits had not significant (P>0.05) effects. The cellular immune response to the injection of Phytohaemagglutinin-P (PHA-P) in the birds that fed apple vinegar contained water were significantly (P<0.05) more than birds fed non-supplemented water (control). Ileal chyme lactobacillus counts and pH of the crop, gizzard, and ilium contents measured at day 10th, remained unaffected (P>0.05) by the drinking water supplementation with apple vinegar. The addition apple vinegar to drinking water did not shown significant (P>0.05) effects on relative weights of spleen and lymphoid organs and the humoral immune response to sheep red blood cell intramuscular injection. The results of this study revealed, added apple vinegar to broiler chicken’s drinking water improved growth performance and in the lower age had meaningfully influence.