Mozafar Rahimpour; Kamran Taherpour; Hossein Ali Ghasemi; Hassan Shizadi; Farhad Rostami
Volume 23, Issue 3 , September 2021, , Pages 433-446
Abstract
A 42-d study was conducted to investigate the effects of emulsifier and inulin supplementation in diets with different sources of fat on growth performance, carcass traits, immune response, and blood biochemical indices of broilers. A total of 800 one-day-old male broilers in a 2 × 2 × 2 ...
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A 42-d study was conducted to investigate the effects of emulsifier and inulin supplementation in diets with different sources of fat on growth performance, carcass traits, immune response, and blood biochemical indices of broilers. A total of 800 one-day-old male broilers in a 2 × 2 × 2 factorial experiment with two fat sources (soybean oil and beef tallow), two emulsifier levels (0 and 0.1% lysophospholipids) and two levels of inulin supplementation (0 and 0.1%) were used in a completely randomized design with eight treatments, five replications and 20 chicks per replicate. Birds fed diets containing beef tallow and emulsifier had a lower feed conversion ratio and abdominal fat percentage than birds fed diets containing soybean oil and emulsifier (P <0.05). The abdominal fat percentage and feed conversion ratio were lower in birds that received fat and inulin diets than other birds (P<0.05). Birds fed the emulsifier-containing diet had higher values of primary and secondary antibody titers against Newcastle disease virus, and secondary titers of total antibody and IgM against sheep red blood cells (SRBC) compared to those fed the emulsifier-unsupplemented diet (P<0.05). Daily weight gain and antibody titer against Newcastle disease and SRBC were higher in birds receiving the inulin-supplemented diet compared to other birds (P<0.05). In conclusion, the use of 0.1 % emulsifier and inulin, either singly or in combination, in the diet of broiler chickens can be useful for improving growth performance and immune response.
Hassan Shirzadi; Zaynab Nazari; Kamran Taherpour
Volume 22, Issue 1 , March 2020, , Pages 153-164
Abstract
The current study was conducted to evaluate the efficacy of Thymbra spicata (TS) and Echinacea purpurea (EP) powders on quality of breast muscle in broiler chickens exposed to Campylobacter jejuni. A total of 192 one-d-old straight-run broiler chicks (Ross 308) were randomly allocated to 6 dietary ...
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The current study was conducted to evaluate the efficacy of Thymbra spicata (TS) and Echinacea purpurea (EP) powders on quality of breast muscle in broiler chickens exposed to Campylobacter jejuni. A total of 192 one-d-old straight-run broiler chicks (Ross 308) were randomly allocated to 6 dietary treatments in a completely randomized design with 4 replicates and 8 birds per each. The experimental diets were as follows: 1) basal diet without additive (control group); 2,3) basal diet supplemented with EP powder (0.25 and 0.50%; EP-0.25 and EP-0.50); 4,5) basal diet supplemented with TS powder (0.25 and 0.50%; TS-0.25 and TS-0.50), and 6) basal diet supplemented with Erythromycin (55 ppm). All of the broiler chicks were orally gavaged with Campylobacter jejuni (4×1011 cfu/mL) on d 21. Malondialdehyde concentration in breast muscle was significantly decreased by supplementing diets with EP-0.25, TS-0.25, and erythromycin (P<0.05). All experimental treatments also resulted in a significant decrease in the colonization of psychrophilic bacteria in breast muscle when compared with the control group (P<0.05), however, aerobic bacteria count was significantly decreased only by TS-0.25 and erythromycin (P<0.05). Other traits such as pH, color, chemical composition, water holding capacity, drip loss, cooking loss, and press loss were not significantly affected by treatments. As a conclusion, for the prevention of lipids peroxidation and the decline of psychrophilic bacteria count, it could be advised to use EP and TS with 0.25% diet instead of erythromycin, however, TS is preferable to EP, because of the higher antibacterial activity on reduction of aerobic bacteria count.
Kobra Sookhtehzari; Ali Khatibjoo; Hoshang Jafari; Mohammad Akbari-Gharaei; Kamran Taherpour
Volume 21, Issue 4 , January 2020, , Pages 533-543
Abstract
The effects of high stocking density and threonine (Thr) supplementation on performance and immunity in broiler chickens was evaluated. In this experiment 495 male Ross-308 broiler chickens were allocated to 4 treatments with 5 replicates in a completely randomized design. The dietary treatment ...
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The effects of high stocking density and threonine (Thr) supplementation on performance and immunity in broiler chickens was evaluated. In this experiment 495 male Ross-308 broiler chickens were allocated to 4 treatments with 5 replicates in a completely randomized design. The dietary treatment consisted of: 1) basal diet as control with low density (10 birds/m2), 2) high density group (15 birds/m2 which fed basal diet) and 3 and 4) high density group which fed diet containing 10 and 20 percent Thr higher than requirment, respectively. The results showed that high stocking density decreased feed intake, body weight and feed conversion ratio at different period of production and increased European production efficiency factor (EPEF). Thr supplementation also reduced growth performance parameters (P < 0.05).Dietary treatments deseased antibody titer against NewCastle, but avian influenza virus, cell mediated immunity against phytoheamaglutinin, blood metabolites, blood cell count, and serum spartat aminotransferase and malondialdehyde concentration did noy change significantly. Serum alanine aminotransferase concentration in broiler chickens fed diet containing 20 percent Thr higher than requirment was higher than the others (P < 0.05). In conclusion, under the condition of this study (15 birds/m2), Thr supplementation (both of the levels) did not improved broiler chickens performance and immunity and more research is needed in this subject.
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.
Nasrin Rashidi; Ali Khatibjoo; Kamran Taherpour; Mohammad Akbari Gharaei; Hassan Shirzadi
Volume 20, Issue 1 , May 2018, , Pages 145-157
Abstract
Using 350 Ross broiler chickens, the effect of licorice extract (LE), probiotic, antifungal and boiler litter biochar on performance of broiler chickens fed aflatoxin B1 contaminated diet in a completely randomized design with 7 treatment (negative control (basal diet without aflatoxin and additives), ...
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Using 350 Ross broiler chickens, the effect of licorice extract (LE), probiotic, antifungal and boiler litter biochar on performance of broiler chickens fed aflatoxin B1 contaminated diet in a completely randomized design with 7 treatment (negative control (basal diet without aflatoxin and additives), positive control (basal diet + 1 mg aflatoxin B1 and without additives) and 5 other treatments were positive control with LE (3 and 6 g/kg), Protexin probiotic (0.5 gr), Agrabond (0.5 gr/kg) and biochar toxin binder (10 g/kg)) and 5 replicates (10 birds in each replicate) considered. The treatments were. The result showed that aflatoxin B1 lowered body weight gain and breast relative weight and increased FCR and abdominal fat of broilers (P < 0.05). Broilers fed negative control, 3 g/kg LE and biochar containing diets during the growing period and birds fed negative control and 3 g/kg LE during the entire period had higher BW and lower FCR as compared to other groups (P < 0.05). Negative control diet decreased breast relative weight and tight meat crude protein percent, while all of the additives led to improving these traits since the highest relative weight of breast and tight meat crude protein percent were observed in probiotic and biochar groups respectively (P < 0.05). The highest serum total protein was seen in broilers fed negative control and 3 g/kg LE diets while the lowest serum uric acid was observed in broilers fed negative control, 6 g/kg LE, Agrabond and biochar diets (P < 0.05). In conclusion, licorice extract and broiler litter biochar additives decreased adverse effects of aflatoxin B1 on broiler chickens performance.