this experiment was conducted to study the effect of dietary n-3 to n-6 ratio on performance, immune response, blood parameters and fatty acids profile of broiler chickens. a total number of 192 one day old broiler chicks were randomly alloctted into 6 groups. chicks of groups 1, 2, 3, 4, 5 and 6 were fed balanced corn-soybean diets containing n-3 to n-6 ratios of 1:1, 1:3, 1:5, 1:7, 1:9 and 1:...

the antimicrobial effectiveness of different extracts of chicory (cichorium intybus l.) plant including methanolic, ethylic acetate, chloroformic, and aqueous extracts was evaluated by disk diffusion method. the ethylic acetate extract showed higher antibacterial activity against e. coli compared with others. then, effects of different levels of ethylic acetate extract on growth performance and...

this study was conducted to investigate the effects of the medicinal plant yarrow (achillea millefolium l.), a probiotic (primalac) and an antibiotic (virginiamycin) on gastrointestinal tract (git) characteristics, microbial populations, immune response, serum lipids and growth performance of broiler chickens. a total of 250 one-day old male broilers (ross 308) were randomly allocated to 5 trea...

Extracts of essential oils (EO) such as thymol, carvacrol, and cinnamaldehyde that occur naturally in oregano, thyme, and cinnamon have previously been shown to have positive effects on broiler performance. However, it was not known if these EO compounds affect the sensory characteristics of the broiler meat produced. The present study examined the effects of feeding 3 different blends of EO (D...

this research was conducted to compare the effects of two medicinal plants (peppermint and aloe vera) and antibiotic growth promoter on ileum microflora population and growth performance of broiler chickens. in this experiment, 375 one-day old male broiler chickens (ross 308) were used on a completely randomized design with 5 dietary treatments which were replicated 5 times with 15 birds per re...

in the present study, chicory root powder (crp) as growth promoter at 1% and 3% levels was supplemented in broilers’ diet to investigate the growth performance and histo-morphometry of jejunum. one hundred twenty, one-day-old male broilers were used in a completely randomized design (crd) with 3 treatments and 4 replicates (10 chicks per replicate). at the end of each period (0-10, 11-24 and 0-...

this study evaluated the effects of drinking thyme essence (dte) (zero, 0.10, 0.15 and 0.20 ml/l) on growth performance, immune response and changing of intestinal bacterial population in broiler chickens. a total number of 500 day old male broiler chicks (ross 308), were randomly assigned to 4 treatments with 5 replicates and 25 chickens per each, based on a completely randomized design (crd)....

a study was conducted to compare the growth performance as well as blood and carcass variables of two broiler strains reared in a conventional broiler house and a modified greenhouse equipped with cooling pads and tunnel ventilation system. eight hundred day-old chickens of two commercial strains (ross  308 and lohmann) were selected and placed in  8 floor pens (4 pens of  50 broilers for each ...

this study was performed with growing chicken (14 to 56 d of age) to evaluate the effects of feeding them a barley or triticale-based diet. the treatments were corn diet (1) as a control, hulless barley diet with (5) or without (2) enzyme, triticale diet with (6) or without (3) enzyme and hulled barley diet with (7) or without (4) a commercial β-glucanase enzyme. in a digestibility trial, 21 ma...

an experiment was conducted on broiler chickens to study the effects of conjugated linoleic acid (cla), fish oil, both at 7% of the diet, or their mixtures at 3.5% of the diet, on the performance, carcass traits and intestinal morphology of broiler chickens. the chicks fed with 7% fish oil or 7% cla diets, were found to have an inferior weight gain in grower and finisher phases, respectively. a...