an experiment was conducted to evaluate the effect of replacing dietary limestone with mashhad power plant calcium-waste in combination with available phosphorus level on growth performance, tibial strength and blood alkaline phosphatase activity in broiler chickens. three hundred and eighty four male broiler chickens were used in a complete randomized design experiment with a 4×2 factorial arr...

background: increasing of oxygen consumption in fast-growing broiler chickens is associated with the more pronounced occurrence of right ventricular hypertrophy and ascites. while, rearing of susceptible chickens in dark condition could reduce the metabolic rate of birds and hence the incidence of ascites. objectives: the present study was designed to investigate a comparative study on the infl...

This experiment was conducted to determine the effects of dietary myrtle essential oil on small intestinal morphology and microbiology of broiler chickens. Two hundred day-old broiler chickens (Ross 308) were allocated to 5 treatments, 4 replications with a completely randomized design. The diets were supplemented with: no myrtle essential oil (control), each of myrtle essential oil at levels o...

Female calves (n = 54) were assigned to 1 of 3 whole milk feeding treatments at an average age of 7 days and remained on treatment for 70 days. The treatments were twice-aday feeding with weaning at 56 days of age (TAD56); once-a-day feeding with weaning at 56 days of age (OAD56); and once-aday feeding with weaning at 42 days of age (OAD42). Calves were housed in groups of 9 and were fed 5 litr...

to evaluate the effect of essential oils of oregano on performance, immune response in broiler chickens arian, an experiment in a completely randomized design with a total of 500 broiler chicks, in 5 treatments, including the control diet, control diet + 100 mg/kg protexin, control diet + 150 mg/kg avilamysine and control diet + 200 and 400 mg/kg oregano oil with 4 replicates and 25 chicks were...

to investigate the effects of zataria multiflora boiss essential oil (zmb) on incidence of ascites syndrome and blood parameters of arian broiler chicks, an experiment with 500 one-day-old chicks were conducted. this experiment was based on completely randomized design with 5 treatments including 1) control (basal diet), 2) basal diet with 100 mg/kg probiotic, 3) basal diet with 150 mg/kg avila...