Sajedeh Shamsollahei; Leila Hassanvand; bahman parizadian
Volume 20, Issue 3 , November 2018, , Pages 437-450
Abstract
This study was conducted to evaluate the effects of dietary inclusion of peppermint essential oils (PEO) on productive performance and immune response in laying hens imposed to dexamethasone-induced stress. The experiment was performed in a 2×3 factorial arrangement in a randomized complete block ...
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This study was conducted to evaluate the effects of dietary inclusion of peppermint essential oils (PEO) on productive performance and immune response in laying hens imposed to dexamethasone-induced stress. The experiment was performed in a 2×3 factorial arrangement in a randomized complete block design with 90 Hy- Line (W36) laying hens in 6 treatments and 5 replicates of 3 birds in each. Peppermint essential oil was included into a basal (control) diet at 200 and 400 mg/kg. Dexamethasone was injected subcutaneously in two levels of 0 and 4 mg per bird/ week. Dexamethasone injection decreased egg production, egg mass and body weight gain while increased feed conversion ratio, eosinophil count and serum total protein concentration compared with control birds (P < 0.05). Egg yolk weight was greater in birds fed with diets containing 200 mg/ kg PEO compared with control birds (P < 0.05). Dexamethasone, peppermint essential oil as well their interaction exhibited no significant effect on antibody titer against Newcastle, Influenza and Gambro viruses (P > 0.05). In conclusion, dexamethasone-induced stress exhibited an adverse impact on feed conversion ratio and egg production in laying hens and inclusion of PEO at 200 mg/ kg modulated, in part, certain negative effects including egg weight of hens.
Volume 19, Issue 2 , August 2017, , Pages 427-439
Abstract
This study was conducted to investigate the effect of dietary supplemented with zinc oxide (0, 40, 80, 120 and 160 mg /kg of diet) and vitamin E (Vit E; α-tocopherol acetate; 0 and 40 IU/kg of diet) on fertility and hatchability of Japanese quails, and growth performance and immune response of ...
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This study was conducted to investigate the effect of dietary supplemented with zinc oxide (0, 40, 80, 120 and 160 mg /kg of diet) and vitamin E (Vit E; α-tocopherol acetate; 0 and 40 IU/kg of diet) on fertility and hatchability of Japanese quails, and growth performance and immune response of their progenies. A total of 960 Japanese quails (Coturnix coturnix japonica) 70 d of age were housed in cages and randomly allocated to 10 treatments with 4 replicates of 24 birds in each (sixteen females and eight males). Dietary supplemented zinc and Vit E significantly increased hatchability (P≤0.05). There was a significant effect of Vit E on breeder quails fertility, while zinc supplementation was reduced embryonic mortality at the second stage (10-16 day) (P≤0.05). Supplemental zinc significantly improved feed conversion ratio of offspring in the first three weeks of age, while added Vit E improved feed conversion ratio only in the first week of offspring growth (P≤0.05). Dietary supplementation of Japanese quail’s ration with zinc and Vit E increased immune response of offspring, and enriched Zn content of tibia bone of offspring increased with zinc supplementation. In conclusion, supplementing breeder Japanese quails ration with zinc and Vit E improved hatchability and growth performance and immune response of offspring.
babak masouri; somayeh sallary; heshmatollah khosravinia; saleh tabatabaei vakili; tahereh mohammadabadi
Volume 19, Issue 1 , May 2017, , Pages 201-212
Abstract
This study was carried out to examine the effect of supplementation of canola and fish oils (5% fish oil, 3% fish oil + 2% canola oil, 2% fish oil + 3% canola oil and 5% canola oil) and Satureja khuzistanica essential oils (SkEO) (0 and 400 mg/kg), into a basal diet on productive performance, meat cholesterol, ...
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This study was carried out to examine the effect of supplementation of canola and fish oils (5% fish oil, 3% fish oil + 2% canola oil, 2% fish oil + 3% canola oil and 5% canola oil) and Satureja khuzistanica essential oils (SkEO) (0 and 400 mg/kg), into a basal diet on productive performance, meat cholesterol, lipid stability and certain blood lipid components in broiler chickens raised under normal and heat stress conditions during day 22 to 42 of age. The experiment was conducted in a 4×2×2 factorial expriment using 640 one-day-old Ross 308 chicks in a completely randomised blocks design with 5 replicates of 8 birds in each replication. Oil source significantly decreased FCR, serum LDL and cholesterol content in thigh and breast muscles at day 42 of age. Inclusion of 400 mg/kg SkEO in diet significantly increased daily weight gain and decreased cholesterol content and TBARS concentration in thigh and breast muscles in heat stressed chicks. Heat stress condition significantly decreased FCR and increased TBARS as well as cholesterol content in breast muscle and serum cholesterol concentration during day 22 to 42 of age. It was concluded that supplementation of 400 mg/kg SkEO and canola oil into diet could have a positive effect on productive performance and reduce the meat and serum cholesterol concentration in broiler chicken.
Abbas Masoudi; Arash Azarfar
Volume 18, Issue 4 , December 2016, , Pages 877-888
Abstract
In the current study, growth parameters of broiler chickens fed with rice hull were estimated and their final body weigh was predicted using non-linear, spline regression and neural networks models. The experimental treatments were control and dietary inclusion of rice hull at the levels of 2.5, 5 and ...
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In the current study, growth parameters of broiler chickens fed with rice hull were estimated and their final body weigh was predicted using non-linear, spline regression and neural networks models. The experimental treatments were control and dietary inclusion of rice hull at the levels of 2.5, 5 and 7.5 percent. Predicted final body weight estimated by non-linear regression models in the current study was higher in control chicks compare with those fed rice hull containing diets (P<0.05), but similar among the other birds. Inflection point of growth curve occurred earlier in in control chicks than those fed hull rice containing diets (P<0.05), but increasing hull rice in the diet level had no effect on this parameter. The highest and lowest body weight at inflection point observed in birds fed control and those fed diet containing 5 percent of rice hull, respectively (P<0.05). Feeding chicks with diets containing rice hull decreased parameters b of spline regression model compared with control birds, while parameter c was only lower in birds fed diet containing 7.5 percent hull rice compared with birds on control diet (P<0.05). According to our results, spline regression model is more efficient than the non-linear and artificial neural network models to predict body weight of broiler chicks fed with diets containing rice hull at day 42 of age.
Zeinab Pourazadi; Heshmatollah Khosravinia; Hassan Nourozian
Volume 17, Issue 2 , October 2015, , Pages 247-256
Abstract
Effects of post-hatch fasting (PHF) and subcutaneous injection of Ca-gluconate (Ca-g) on productive performance, immune response and mortality of broiler chicks were investigated using 640 one-day-old Ross 308 chicks in a 5×2 factorial experiment with five PHF levels (zero, 12, 24, 36 and 48 h) ...
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Effects of post-hatch fasting (PHF) and subcutaneous injection of Ca-gluconate (Ca-g) on productive performance, immune response and mortality of broiler chicks were investigated using 640 one-day-old Ross 308 chicks in a 5×2 factorial experiment with five PHF levels (zero, 12, 24, 36 and 48 h) and two Ca-g injection levels (zero and 0.7 ml) in a completely randomized block design in four replicate pens of 16 birds each up to day 28 of age. The extended PFD up to 36 h significantly decreased body weight and percentage of monocytes and increased mortality of the chicks. Injection of Ca-g increased mortality of the birds by six-fold compared with the control birds (P<0.05). The Ca-g injected birds showed greater antibody titer against Newcastle virus at day 15 of age. The mortality rate of the chicks was significantly affected by PHF×Ca-g interaction and the Ca-g injected birds showed greater mortality percent during all PHF periods. It was concluded that PHF greater than 24 h has adverse effect on productive performance and mortality in broiler chicks at day 28 of age. Administration of Ca-g into the neonate fasted chicks as a source of Ca, glucose and water increased mortality but maintained the yolk immunoglobulins and improved early immune response through day 15 of age.
Hossein Karimi; Arash Azarfar; Heshmatollah Khosravinia; Ali Kiani
Volume 17, Issue 1 , April 2015, , Pages 71-82
Abstract
Our objective was to examine the effect of inclusion of dried de-oiled savory (Satureja khuzistanica; DDS) on production performance and fatty acids composition of longissimus muscle (LM) of finishing lambs. 30 Farhani lambs with average body weight of 33.6±1.4 kg were used. The lambs were randomly ...
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Our objective was to examine the effect of inclusion of dried de-oiled savory (Satureja khuzistanica; DDS) on production performance and fatty acids composition of longissimus muscle (LM) of finishing lambs. 30 Farhani lambs with average body weight of 33.6±1.4 kg were used. The lambs were randomly divided into five groups and individually fed with the experimental diets. In the experimental diets, alfalfa was replaced by dried de-oiled savory at the levels of zero (control diet), 25, 50, 75 and 100 percent. The lambs were fed whit finishing diets for 60 days following a 15-day adaptation period. During the finishing periods the lambs were weighed individually every 15 days and average daily gain, average feed consumption and feed conversion ratio were calculated. At the end of experiment, the lambs were slaughtered. Samples of LM along with subcutaneous fat were taken from the region of 12th and 13th ribs post-mortem and their fatty acids profile were determined by gas chromatography. The results of current study showed that the experimental diets had no effect on production parameters of lambs assessed. Saturated fatty acids content of LM was higher in the lambs fed with diets in which alfalfa was replaced by DDS at the level of 25 percent than those fed with diets in which alfalfa fully replaced by DDS (P<0.05). The lambs fed on diets in which alfalfa was replaced by DDS at the levels higher than 25 percent had numerically higher saturated fatty acids in their LM compared to control diet-fed lambs. The results showed that dietary inclusion of DDS at the level of 75 percent instead of alfalfa numerically increased poly-unsaturated fatty acids content of LM. Dietary replacement of alfalfa with DDS at the levels of 25 to 75 percent numerically lowered the proportion of omega-6 to omega-3 fatty acids of LM compared to the control diet. Results showed that Alfalfa can be replaced by dried de-oiled savory in finishing lambs diets and improve meat quality by reducing sits saturated fatty acids content.
Shahnaz Ebrahiminejad; Heshmatollah Khosravinia; Masoud Alirezaei
Volume 16, Issue 1 , May 2014, , Pages 53-62
Abstract
This study was carried out to investigate the effect ofadministration of Satureja khuzistanica essential oil (SkEO) in drinking water on performance, lipid oxidation, activity of antioxidative enzymes and cholesterol content of thigh meat using 720 one-day-old Ross 308 broiler chicks. The SkEO was added ...
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This study was carried out to investigate the effect ofadministration of Satureja khuzistanica essential oil (SkEO) in drinking water on performance, lipid oxidation, activity of antioxidative enzymes and cholesterol content of thigh meat using 720 one-day-old Ross 308 broiler chicks. The SkEO was added into drinking water at zero (control-), 200, 300, 400 and 500 mg/L along with a treatment consisting polysorbate-80 (control+) at 500 mg/L. Inclusion of SkEO in drinking water significantly decreased water intake and improved production efficiency index of the birds during days one to 42 of age (P<0.05). The concentration of thiobarbitoric acid reactive substances in thigh meat was significantly decreased by SkEO-treated water (P<0.05). Addition of SkEO into drinking water significantly decreased superoxide dismutase as well as glutathione peroxidase activity in raw thigh meat of the birds (P<0.05). Catalase activity was not influenced by SkEO-added water (P>0.05). Lipid content and cholesterol level in thigh meat was significantly decreased in the birds received 500 and 200 to 400 mg/L SkEO through drinking, respectively (P<0.05). It could be concluded that administration of Satureja khuzistanica essential oils into drinking water at minimum 200 mg/L promoted meat lipid stability. Cholesterol levels of thigh meat decreased by SkEO at 200 to 500 mg/L.