Research Paper
Animal Nutrition and poultry
omid nouri; Mojtaba Zaghari; hosna hajati
Abstract
In order to investigate the effect of inorganic selenium replacement with organic selenium from Spirulina algae on performance and breast meat quality of broilers, a total of 160 one-day-old broilers were used in a completely randomized design with four treatments, eight replicates and five birds per ...
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In order to investigate the effect of inorganic selenium replacement with organic selenium from Spirulina algae on performance and breast meat quality of broilers, a total of 160 one-day-old broilers were used in a completely randomized design with four treatments, eight replicates and five birds per each replicate. The sources of selenium used included sodium selenite and organic selenium from Spirulina algae which were replaced at two levels of 50 and 100 percent. The organic selenium was produced by the culture of Spirulina algae and its enrichment with selenium. The selenium content of different treatments was measured by ICP-Mass method. In this experiment, the feed intake and body weight gain parameters were measured weekly and feed conversion ratio was calculated. At 42 day of age, one bird was slaughtered from each replicate and the weight of carcass ready to cook was measured. The breast meat was sampled for measurement of pH and selenium storage. The results showed that it was not observed any significant difference in performance traits and ready to cook carcass percentage among different treatments. There was no significant difference in breast muscle pH at 0 and 24 hours after slaughtering. The amount of selenium deposited in breast muscle of birds fed organic selenium had significant increase when compared with other treatments (P<0.05). Generally, the results of this study showed that 100% replacement of sodium selenite with organic selenium from Spirulina algae led to increase in breast muscle selenium deposition without reduction in bird performance.
Research Paper
Ali Asghar Khalil-Khalili; Mahdi Zhandi; Mojtaba Zaghari; Hassan Mehrbani-Yeganeh; Alireza Yousefi
Abstract
The aim of the present study was to investigate the effect of dietary supplementation of organic selenium (oSe) on blood parameters of male broiler breeder under dexamethasone (Dexa) challange. Fifty broiler breeder roosters (Ross 308) at the age of 64 weeks were randomly allotted to five groups (10 ...
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The aim of the present study was to investigate the effect of dietary supplementation of organic selenium (oSe) on blood parameters of male broiler breeder under dexamethasone (Dexa) challange. Fifty broiler breeder roosters (Ross 308) at the age of 64 weeks were randomly allotted to five groups (10 roosters/group) and fed a standard diet supplemented with different levels of oSe during 10 successive weeks of the experimental period. To induce stress, dexamethasone (2 mg/kg body weight) was injected during weeks of 4 to 6 of the experiment, in one-day-interval manner. Experimental treatments including diet without oSe supplementation and Dexa treatments (negative control; NC), or treated with Dexa and different levels of oSe including 0 (positive control; PC), 0.15 (Se15+Dexa), 0.30 (Se30+Dexa) or 0.45 (Se45+Dexa) mg/kg of diet. During the experimental period, concentration of testosterone, corticosterone, malondialdehyde (MDA), total antioxidant capacity (TAC), hepatic enzymes activity (ALT and AST), uric acid, total protein, albumin, plasma lipid and glucose parameters, were evaluated every two weeks. Hepatic enzymes and glutathione peroxidase (GPX) activity, TAC, concentration of uric acid, total protein, albumin and glucose were not affected by the treatments (P<0.05). Dexamethasone injection increased plasma concentrations of total cholesterol, HDL, LDL and MDA in the PC group compared with the NC group (P<0.05). However, oSe ameliorated these negative impacts in dexamethasone-stressed roosters (P<0.05). Generally, the results of this study indicate that dietary inclusion of oSe improved the negative effects of Dexa on some blood parameters in roosters under dexamethasone challange.
Research Paper
Mina Hajilu; Rasoul Pirmohammadi; Hamed Khalilvandi-Behroozyar; Behzad AsadNejad
Abstract
Abstractthe experiment was conducted to investigate the effect of different fat sources in the starter diet on the growth and health of early weaned Ghezel lambs. Twenty female lambs after 4 weeks of breastfeeding was randomly divided into 4 groups and consumed starter diets containing 3% calcium salt ...
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Abstractthe experiment was conducted to investigate the effect of different fat sources in the starter diet on the growth and health of early weaned Ghezel lambs. Twenty female lambs after 4 weeks of breastfeeding was randomly divided into 4 groups and consumed starter diets containing 3% calcium salt of unsaturated fatty acids (flaxseed oil, soybean oil and fish oil) for 2 month after 2 weeks of adaptation. The control group were only breast fed. Dietary inclusion of protected flaxseed oil significantly increased DMI and weight gain. Dietary treatments significantly affect the biometric characteristics and the highest amount of NDF, ADF, CP and OM digestibility coefficients were observed in protected flaxseed oil fed lambs, with no effects on fatty acid digestibility. Concentration and molar ratios of VFA and ruminal pH did not affect by dietary treatments. Total blood protein levels significantly decreased in fish oil group compared to control. Cholesterol and blood glucose levels, also decreased significantly in all treatments compared to those of breast-fed lambs, but triglyceride and albumin levels did not differ significantly. In conclusion, the experimental results showed that early weaning and inclusion of flaxseed calcium salts in starter diet improves the growth performance of Ghezel lambs.
Research Paper
alireza moradi; Naser Tajabadi
Abstract
This study aimed to isolate lactic acid bacteria from gastrointestinal tract of honey bees (Apis mellifera) and assess the probiotic potential of isolates, and their effect on some performance parameters of colonies. Therefor, 10 colonies from the apiary with one hundred bee colonies were randomly selected ...
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This study aimed to isolate lactic acid bacteria from gastrointestinal tract of honey bees (Apis mellifera) and assess the probiotic potential of isolates, and their effect on some performance parameters of colonies. Therefor, 10 colonies from the apiary with one hundred bee colonies were randomly selected and used for sampling. Twenty worker bees were taken from each hive and after being transferred to the laboratory under complete comfort and ventilation conditions, their gastrointestinal tract was completely isolated under carbon dioxide flushing and after culture in MRS medium different colonies were selected. Liquid-solid periodic cultures were repeated up to 8 steps to achieve pure cultures. Finally, gram-positive, catalase and hemolysis negative samples were isolated and identified based on phylogenetic analysis. These bacteria were registered in the Gene bank (NCBI) with accession number of MW376601, MW376904, MW376896 and MW405566, respectively. In vivo studies showed the positive effects of treatment with isolates by spraying on frames and bacterial culture mixed in syrup (sugar - water) on spawning, production and hygienic behavior of bees. Comparison of treatments with Duncan's multiple range test (p≤ 5%) showed that all experimental treatments in quantitative population factors and spawning and quality were significantly different from the control treatment. However, the control treatment had a significant difference in honey reserves due to low spawning compared to experimental treatments and less nectar consumption.
Research Paper
Farhad Ahmadi; Seyyed Mojtaba Mousavi; Mohsen Mohammadi Saei; Babak Masoori
Abstract
To investigate the effect of different levels of Algasan pigment on the performance and quality of quail meat, 204 quails at the age of three days were randomly divided into four groups in three replications. Treatments included control diet (without pigment) or with 0.1, 0.2, and 0.3% (A1, A2, and A3) ...
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To investigate the effect of different levels of Algasan pigment on the performance and quality of quail meat, 204 quails at the age of three days were randomly divided into four groups in three replications. Treatments included control diet (without pigment) or with 0.1, 0.2, and 0.3% (A1, A2, and A3) Algasan, respectively. In addition to recording performance data, at 38 days of age, two male quail were randomly selected from each replicate to evaluate meat quality. Data were analyzed by SAS software and means were compared by Duncan test. The effect of different levels of pigment in quail diets on mean body weight gain, feed intake, feed conversion ratio, and live weight were not significant. But the highest carcass weight in A1 treatment (118.33 g), the highest carcass yield in A3 treatment (73.36%), the highest light density in A1 treatment (2.029, 1.268, and 2.249%), and the highest water holding capacity were observed in A3 treatment (4.720) (P≤0.05). The lowest meat pH, drip loss, and cooking loss showed in control (6.342), A2 (13.055%), and A3 (19.985%) treatments, respectively (P≤0.05). In general, Algasan pigment can be effective in improving some parameters of the performance and quality of quail meat.
Research Paper
Mohamadreza Afrazandeh; Rostam Abdollahi Arpanahi; Mokhtar Abbasi; Nasser Emam Jomeh Kashan; Rasoul Vaez Torshizi
Abstract
The aim of this study was to investigate the effect of genotype by environment interaction through calculating the rank correlation between estimated breeding values of bulls in Iran and in Interbull. The data of 2,000,378 records of 305 days of milk, fat and protein production in the first, second and ...
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The aim of this study was to investigate the effect of genotype by environment interaction through calculating the rank correlation between estimated breeding values of bulls in Iran and in Interbull. The data of 2,000,378 records of 305 days of milk, fat and protein production in the first, second and third lactations in years of 2004 to 2021 were used. The records were from daughters of 9603 sires in 3,444 herds. In model one, the breeding value of animals in the multivariate analysis for milk, fat and protein production of first lactation was estimated. In model two, a repeatability model was used to estimate breeding values in the multivariate analysis for milk, fat and protein production from first to third parity. Rank correlation estimated between Iran and Interbull for bulls which had at least 20 daughters in 10 herds. In the single-parity model, the rank correlations between the estimated breeding values in Iran and Interbull for milk, fat and protein were 0.76, 0.75 and 0.76 respectively. In the multiple-parity model, the rank correlations between the estimated breeding values in Iran and Interbull for milk, fat and protein production were 0.48, 0.43 and 0.51 respectively, which shows the interaction of genotype by environment. The results showed different rank correlations for two types of models used. Therefore, due to genotype by environment interaction, the rank of bulls in Iran is different from Interbull estimates
Research Paper
Mahmoud Reza Heidari; Behrouz Dastar; Seyed Naser Mousavi; Reza Mirshekar; sayed abdoullah hosseini; Majid Abbasi
Abstract
A total of 1440 Ross 308 male broilers was used in a randomized complete block design with eight treatments in six blocks from 1 to 42 d. Experimental diets were: soybean meal (control treatment), raw soybeans, full-fat soybeans extruded (15%) at 90 and 150 °C, with (0.02%) or without protease enzyme ...
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A total of 1440 Ross 308 male broilers was used in a randomized complete block design with eight treatments in six blocks from 1 to 42 d. Experimental diets were: soybean meal (control treatment), raw soybeans, full-fat soybeans extruded (15%) at 90 and 150 °C, with (0.02%) or without protease enzyme supplementation. The use of raw soybeans compared to soybean meal or extruded full-fat soybean significantly reduced feed intake, body weight and relative carcass weight, as well as increased feed conversion ratio and pancreatic weight (P <0.01). weight gain was improved in diets supplemented by protease enzyme compared to diets containing raw soybeans (P <0.01). Feed conversion ratio was improved in diets containing raw soybean and soy bean meal by dietary protease supplementation (P <0.01). Extrusion temperature did not affect the growth performance of experimental birds. Diet containing raw soybean without enzyme increased blood cholesterol levels (P <0.05). According to the findings of this study, the use of protease enzyme in diets containing soybean meal or raw soybean can improve the performance of broilers However, such an effect is less pronounced in diets containing extruded full-fat soybean meal.
