Mozhgan Mazhari; Zahra Ranjbari nasab
Volume 24, Issue 2 , July 2022, , Pages 165-175
Abstract
Effect of organic selenium and chromium supplementation on growth performance, carcass characteristics, and meat quality of broiler chickens was studied using 200 one-day-old Ross 308 male broiler chickens in a 2×2 factorial arrangements with 4 treatments, 5 replicates and 10 birds each. Experimental ...
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Effect of organic selenium and chromium supplementation on growth performance, carcass characteristics, and meat quality of broiler chickens was studied using 200 one-day-old Ross 308 male broiler chickens in a 2×2 factorial arrangements with 4 treatments, 5 replicates and 10 birds each. Experimental treatments were including 2 levels of Se-Met (0 and 0.4 mg/kg diet) and 2 levels of Cr-Met (0 and 0.4 mg/kg diet). At the end of trial, two birds per replicates were randomly selected and slaughtered to determine carcass traits and meat quality. Cr-Met supplementation increased feed intake during the grower and the whole period (P<0.05). The birds receiving 0.4 mg/kg of Se-Met and Cr-Met diets had the highest body weight gain (BWG) and the lowest feed conversion ratio (FCR) in the grower, finisher and whole periods (P<0.05). The highest BWG and the lowest FCR in whole period belonged to the birds fed by both elements (P<0.05). The highest relative weight of carcass and breast was observed in birds fed with Se-Met and Cr-Met (P<0.05). The highest relative weight of carcass was seen in birds fed both elements (P<0.05). Addition of Se-Met and Cr-Met increased the moisture and water holding capacity and decreased the cooking loss and malondialdehyde (MDA) content of breast meat (P<0.05). The interaction effect of treatments on meat quality was significant, as the highest water holding capacity and the lowest cooking loss and MDA was seen in broilers fed by both Cr-Met and Se-Met (P<0.05). According to the results of this experiment, it is suggested to add Se-Met and Cr-Met to diet to improve growth performance, carcass traits, meat quality and stability of broiler chickens.
Seyyed Majid Azarm; Somayyeh Salari; Mohsen Sari; Mohammad Reza Ghorbani; Mohammad Hojjati
Volume 22, Issue 2 , June 2020, , Pages 301-312
Abstract
This experiment was conducted to evaluate the effect of Thyme essential oil on performance and some physiological parameters of broiler chickens fed diets containing wheat in a completely randomized design with a 2×3 factorial arrangement using 264 broilers (Ross 308) in ground floor. Treatments ...
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This experiment was conducted to evaluate the effect of Thyme essential oil on performance and some physiological parameters of broiler chickens fed diets containing wheat in a completely randomized design with a 2×3 factorial arrangement using 264 broilers (Ross 308) in ground floor. Treatments consisted of 2 levels of wheat (0 and 50% of the diet) and 3 levels of essential oil of Thyme (0, 200 and 400 ppm). Performance parameters were recorded weekly. Determination of micro-flora, carcass characteristics, and blood parameters were done on day 42. The results showed that adding the Thyme essential oil to the diet containing 50% wheat increased feed intake at the all period of experiment. Body weight gain was increased significantly in the birds that consumed 50% wheat with 400 ppm essence compared to the birds consumed the diet without wheat or without essence at the starter period. The birds consumed the diet without wheat with essence had lower blood concentration of LDL. Although, adding essence at the level of 400 ppm to the diet without wheat increased significantly blood concentration of HDL. The diet contained 50% wheat without essence had higher abdominal fat compared to the diet with 200 and 400 ppm of essence without wheat and also the diet contained 50% wheat with 400 ppm essence. Overall, the use of Thyme essence at the level of 400 ppm in wheat-based diet is recommended for increasing feed intake and improving some physiological parameters of broiler chickens.
Sakineh Dehghan; Amir Mousaie; OmidAli Esmaeilipour; Arsalan Barazandeh
Volume 20, Issue 3 , November 2018, , Pages 411-424
Abstract
In order to investigate the effect of feeding zinc-methionine (Zn-Met) supplementation on growth performance, nutrients digestibility, ruminal fermentation parameters and some blood metabolites, an experiment was conducted on fifteen Kermani male lambs with average initial body weight of 32.1 ± ...
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In order to investigate the effect of feeding zinc-methionine (Zn-Met) supplementation on growth performance, nutrients digestibility, ruminal fermentation parameters and some blood metabolites, an experiment was conducted on fifteen Kermani male lambs with average initial body weight of 32.1 ± 0.88 kg as a completely randomized design with 3 treatments and 5 replicates for 8 weeks. The experimental treatments were basal diet without supplemental Zn (Control), basal diet plus 50 mg Zn/kg diet of Zn-Met, and basal diet supplemented with 100 mg Zn/kg diet of Zn-Met. The results showed that lambs fed with 100 mg/kg diet of Zn supplementation had lower feed intake than the other treatments (P<0.01). Lambs received 50 mg Zn /kg of diet had higher average daily gain than those on control diet (P<0.05). Lambs fed with Zn supplementation (50 or 100 mg/kg) had better feed conversion ratio than the control group (P<0.05). The apparent digestibility of dry matter, organic matter and neutral detergent fiber (NDF) was higher in lambs fed 50 mg/kg of Zn supplementation than those of the control (P<0.05). However, no difference in fat and acid detergent fiber (ADF) digestibility was observed between treatments. Additionally, feeding Zn-Met supplementation diet had no significant effect on pH and ammonia nitrogen of ruminal fluidas well as serum glucose, total protein, triglyceride and urea concentrations of lambs. According to these results, feeding 50 mg/kg diet of Zn supplemented increases feed nutrients digestibility and compared with 100 mg of the supplement, has better effects on growth performance of fattening lambs.
Ahmad Hassanabadi
Volume 19, Issue 3 , November 2017, , Pages 671-684
Abstract
Effect of different dietary levels of nucleotide supplementation on performance, carcass characteristics, immune system status, small intestine morphology and ileal microbial population of broiler chickens was evaluated using 308 one-day-old mixed-sex Ross 308 broilers in a completely randomized design ...
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Effect of different dietary levels of nucleotide supplementation on performance, carcass characteristics, immune system status, small intestine morphology and ileal microbial population of broiler chickens was evaluated using 308 one-day-old mixed-sex Ross 308 broilers in a completely randomized design with 4 treatments and 7 replicates of 11 chicks in each, up to 42 days of age. Experimental treatments included a corn-soybean meal basal diet (control), and the basal diet containing 0.05, 0.1 and 0.2 percent nucleotide supplementation. The results showed that feed intake, body weight gain and feed conversion ratio of the broilers were not significantly affected by experimental treatments. Results of humeral immune system response at 35 days of age showed that the blood serum IgM concentration in 0.2 percent nucleotide group was higher than 0.05 percent group(P< 0.05). Also, Serum IgG concentration in this age in 0.05 percent nucleotide group was higher than 0.2 percent group(P< 0.05). At 42 days of age, serum IgG concentration in 0.1 percent nucleotide treatment was lower than control group (P< 0.05). The cellular immune system response of chicks fed diet supplemented with 0.1 percent nucleotide at 48 hours after Phytohemagglutinin-P injection was higher than control treatment (P<0.05). On the basis of current experiment results, supplementation of broiler dietswith nucleotide improves cellular immune system response but has no significant effect on other parameters of broiler chickens.
ahmad ali sabetan shiraze; Ahmad Hassanabadi; mohamad javad agah; hasan nasiri moghadam
Volume 19, Issue 2 , August 2017, , Pages 371-387
Abstract
The effects of different dietary levels of olive leaf powder (OLP) as a natural antioxidant on growth performance, carcass traits, some blood parameters, small intestinal morphology and feed digestibility in broiler using a total of 300 one-day-old Cobb500 broilers were studied in a completely randomized ...
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The effects of different dietary levels of olive leaf powder (OLP) as a natural antioxidant on growth performance, carcass traits, some blood parameters, small intestinal morphology and feed digestibility in broiler using a total of 300 one-day-old Cobb500 broilers were studied in a completely randomized design with 5 treatments, 3 replicates and 20 chicks for each replicate, up to 42d. The experimental diets included: corn-soybean meal basal diet (negative control), basal diet supplemented with 250 mg/kg of alpha-Tocopheryl acetate (positive control) and three basal diets containing 2, 2.5 and 3 percent OLP. The results showed that during total experimental period (1-42d), weight gain was decreased (P<0.05) in OLP received groups in comparison with positive control. Feed intake during 1-42d period was decreased (P<0.05) in group which was treated by 3 percent OLP in comparison with positive control group. In starter period, feed conversion ratio was increased (P<0.05) in all groups treated by OLP in comparison with negative and positive controls. Dietary inclusion of different levels of OLP increased (P<0.05) length of villi, crypt depth and villus surface in comparison with the negative or positive controls. A significant decrease (P<0.05) was observed in serum concentrations of the triglycerides, cholesterol and low-density lipoproteins in OLP treated groups in comparison with negative or positive controls. Based on the results, dietary inclusion of OLP up to 2 percent in the broiler diets is recommendable, because it reduces blood lipids and also improves intestinal morphology.
Mohammad Hossein Palizdar; Mohammadreza Pourelmi; Hamidreza Mohammadian-Tabrizi; Zahra Sepehr
Volume 18, Issue 1 , April 2016, , Pages 95-106
Abstract
Effect of GLOBACID® acidifier in different stocking densities on performance and blood metabolites was examined using 576 one-day broiler chickens Ross 308 in a completely randomized design with 6 treatments and four replications for each treatment through a (3 × 2) factorial arrangement with ...
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Effect of GLOBACID® acidifier in different stocking densities on performance and blood metabolites was examined using 576 one-day broiler chickens Ross 308 in a completely randomized design with 6 treatments and four replications for each treatment through a (3 × 2) factorial arrangement with three levels of stocking densities (14, 16 and 18 chicks per square meter) and two levels of GLOBACID® acidifier (zero and one kg per each ton of feed). The lowest feed intake was seen in 18 stoking density treatment which fed one kg of acidifier in the ration and this treatment was significantly different with other treatments (P<0.05). Feed intake was significantly lower in broilers which received acidifier compared with others that did not receive acidifier (P<0.05). Increasing the density from 14 to 18 birds per square meter increased feed conversion ratio (P<0.01). Birds that received acidifier had lower feed conversion ratio than others (P<0.05). Feeding diets containing acidifier lead to a reduction in glucose and antibody titers against SRBC and an increase in cholesterol and triglyceride in broilers blood plasma (P<0.05). The interaction between stocking densities and acidifier on body weight and blood metabolites was not significant. Therefore, using acidifiers in high stocking densities have some advantageous in broiler performance.
Ali Nabizadeh
Volume 13, Issue 2 , March 2012, , Pages 49-60
Abstract
This experiment was conducted for determining the best level of substitution of fish meal with blood meal in broiler chicks. In a three × five factorial experiment with three sources of blood meal (blood meals of Mashhad, Yasoj and Talesh) and five levels of substitution (zero, 30, 40, 50 and 60 ...
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This experiment was conducted for determining the best level of substitution of fish meal with blood meal in broiler chicks. In a three × five factorial experiment with three sources of blood meal (blood meals of Mashhad, Yasoj and Talesh) and five levels of substitution (zero, 30, 40, 50 and 60 percent). A Total of 600 one-day-old chicks were randomly allocated to 15 treatments with each treatment having four replicates. The results indicated that there were not significant difference between sources of blood meal on the weight gain, feed intake, feed conversion rate and percent of breast, thighs and abdominal fat. All the carcass traits were expressed as percentages of live weights. Levels of substitution had significant effect (P< 0.05) on weight gain, feed intake and feed conversion rate. 30 percent substitution had the most feed intake that its difference was significant (P< 0.05) with other treatments. Least feed intake was for 50 percent substitution that its difference was significant (P< 0.05) with other treatments. Most weight gain was for 30 percent substitution which except with 40 percent substitution represented a significant difference (P< 0.05) with other treatments. Type of blood meal and level of substitution and interaction between them had not any significant effect on percent of breast, two thighs and abdominal fat. These results demonstrated that 50 percent substitution of fish meal protein with blood meal of Mashhad improved feed conversion ratio in broiler chicks. Therefore, 50 percent substitution of Mashhad blood meal is recommended.