zahra nooreh; Kamran Taherpour; Mohammad Akbari Gharaei; Hassan Shirzadi; Hossein Ali Ghasemi
Volume 22, Issue 4 , December 2020, , Pages 645-657
Abstract
This study was conducted to investigate the effects of hydro alcoholic extract of Ferulago angulata, antibiotic, probiotic, and vitamin-selenium mixture on growth performance and immune responses of broiler chickens under heat-stress conditions. A total of 350 day-old male broiler chickens (Ross ...
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This study was conducted to investigate the effects of hydro alcoholic extract of Ferulago angulata, antibiotic, probiotic, and vitamin-selenium mixture on growth performance and immune responses of broiler chickens under heat-stress conditions. A total of 350 day-old male broiler chickens (Ross 308) were used in a completely randomized design with 7 dietary treatments and 5 replicates (10 chicks/replicate). Experimental treatments were as follow: no heat stress, without any additive in the diet (negative control; NC); challenged with heat stress, without any additive in the diet (positive control; PC); PC + antibiotic; PC + probiotic; PC + vitamin and selenium mixture; and PC + 200 or 400 mg/kg of Ferulago angulata extract. The results showed that all dietary supplements decreased the negative effects of heat stress on growth performance (P<0.05). All experimental diets(except diet containing antibiotic ) increased the lymphocyte counts, but decreased hetrophil counts and heterophil: lymphocyte ratio compared with the PC group (P<0.05). Secondary total titer and IgG titer against SRBC were higher in broilers receiving dietary supplements under heat stress conditions (P<0.05). The 400 mg/kg of Ferulago angulata extract increased the cell-mediated immune response after an intradermal injection with phytohaemagglutinin-P in the toe web (P<0.05). According to the results of this experiment, the use of 400 mg/kg of Ferulago angulata extract in broiler diets improves growth performance and immune response under heat stress conditions, and can be used as a suitable alternative to antibiotics and common supplements under the heat stress conditions.
zahra nooreh; kamran Taherpour; Mohammad Akbari Gharaei; Hassan Shizadi; Hossein Ali Ghasemi
Volume 21, Issue 3 , September 2019, , Pages 381-392
Abstract
The objective of this experiment was to investigate the effect of hydroalcoholic extract of Ferulago angulata (FA) as a substitute for common feed additive on performance and blood biochemical and hematological parameters of Ross 308 broilers. A total of 450 one-day-old male broiler chickens were ...
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The objective of this experiment was to investigate the effect of hydroalcoholic extract of Ferulago angulata (FA) as a substitute for common feed additive on performance and blood biochemical and hematological parameters of Ross 308 broilers. A total of 450 one-day-old male broiler chickens were used in a completely randomized design with six treatments and five replicates per treatment. The experimental treatments consisted of the basal diet with no additives (control); the basal diet containing Salinomycine antibiotic (500 mg/kg); Primalak® probiotic (recommended level), vitamin and mineral mixture (200 mg/kg of E and C vitamins and 0.3 mg/kg of selenium) and hydroalcoholic extract of FA at the levels of 200 and 400 mg/kg. During the entire experimental period, the birds fed diets with additives had better body weight gain and feed conversion ratio compared with the control birds (P<0.05). Feeding broiler chickens with experimental diets, except for the diet containing antibiotic, resulted in decreased concentrations of serum triglyceride and cholesterol compared with the control diet (P<0.05). The heterophil percentage and the heterophil to lymphocyte ratio decreased in the birds fed diets with evaluated additives, except for treatment containing 200 mg/kg of FA extract (P<0.05). Based on the results of this study, the FA extract, especially at the level of 400 mg/kg of diet, could be used as a suitable substitute for commercial dietary feed additives to improve growth performance and blood hematological and biochemical parameters of broilers.
Zahra Norreh; Ali Khatibjoo; Farshid Fattahnia; Mohammad Akbari-Gharaei
Volume 17, Issue 2 , October 2015, , Pages 269-279
Abstract
Effect of L-carnitine and butyric acid on the performance and immune responses of 192 broiler chickens (Ross 308) was investigated with three levels of L-carnitine (zero, 125 and 250 mg/kg) and two levels of butyric acid (2 g/kg) in a 2×3 factorial arrangement based on randomized complete block ...
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Effect of L-carnitine and butyric acid on the performance and immune responses of 192 broiler chickens (Ross 308) was investigated with three levels of L-carnitine (zero, 125 and 250 mg/kg) and two levels of butyric acid (2 g/kg) in a 2×3 factorial arrangement based on randomized complete block design with 6 dietary treatments, four replicates and eight birds per each. Broilers fed basal diet plus feed additives (L-carnitine and butyric acid) did not have significant differences on feed intake, body weight gain and feed conversion ratio when compred to control group. Broilers fed diets containing additives had higher blood lymphocyte count than control diet fed birds (P<0.05). Primary IgG tiitter (31d) against SRBC in broilers fed diet containing 125 mg/kg L-carnitine was higher than that of the control birds (P<0.05). Skin thickness in response to PHA in broielrs fed diet containing 250 mg/kg L-carnitine alone and 125 and 250 mg/kg L-carnitine in combination with butyric acid was lower than that of control group (P<0.05). It was concluded that addition of 125 mg/kg L-carnitine and two g/kg butyric acid did not influenced broiler chicken performance while improved their immune response.