background: comparison between infectious bursal disease vaccines. objectives: comparison between foreign and iranian intermediate uncloned gumboro vaccines on feed conversion ratio. methods: three hundred and thirty day-old chicks were purchased and for determination of vaccination time by deventer formula, thirty chicks were randomly bled and the remaining chicks divided into 3 equal groups, ...

A total of 540 one-day old male broilers Ross 308 were allocated to 6 treatments in a completely randomized designed with a 2×3 factorial arrangement (aflatoxin B1 (AFB1) and probiotics) with 6 replicates and 15 birds in each. Factors include aflatoxin B1 (control, 500 ppb) and probiotics (control, 108 cfu/mL Bacillus sp. MBIA2.40, 0.2 g Gallipro per kg). Results showed that adding 500 ppb AFB1...

this experiment carried out to evaluate replacing effects of oyster shell (os) with filter cake (fc) of sugar beet industry on performance and quantity and quality of egg in  laying hens .in this trial the filter cake in two physical forms of powder and pellet in  five levels of 0, 25, 50, 75, and 100% replaced for oyster shell. each treatment had 3 replications. the experiment lasted 3 periods...

In order to investigate the effect of different levels of rapeseed meal on performance and content of triiodothyronine (T3), thyroxine (T4) and thyroid stimulating hormone (TSH) in broiler chickens’ blood, 640 1-d-old Ross male broiler chickens were studied through a 4 × 2 factorial arrangement including 4 levels of rapeseed meal (RSM) (0, 5, 10 and 15 percent) and two levels of enzyme (0 and 0...

the effects of methanolic extract and leaf powder of artemisia annua were studied on performance, cellular and humoral immunity in 240 cobb broiler chicks in a completely randomized design. control group did not receive any treatment. the chicks in the second and third groups were fed with feed which contained 2000 and 4000 ppm plant extract in diet and in the groups 4, 5 and 6 chicks received ...

this experiment was conducted to compare the effects of prebiotic as alternative feed additive to an antibiotic growth promoter (bacitracin methylene disalicyate) on the growth performance and morphometrical parameters of the small intestine of broiler chickens. one hundred and forty four day old broiler chicks were randomly assigned to one of three dietary treatments for 6 wk and each treatmen...

the present study examined the antioxidant defense of glutamine on plasma and liver antioxidant status in broilers under phs with respect to changes in the levels of lipid peroxidation marker malondialdehyde (mda), total antioxidant status (tas) and the activities of anti peroxidative enzymes [superoxide dismutase (sod) and glutathione dependent antioxidant enzymes glutathione peroxidase (gpx)]...