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Articles by B. Dastar
Total Records ( 13 ) for B. Dastar
  M. Safaei , F. Boldaji , B. Dastar , S. Hassani , M.S.A. Mutalib and R. Rezaei
  The experiment was conducted to assess the effects of adding silicate minerals in dietary of broiler chickens on the broiler thigh meat moisture, ash, crude protein, intramuscular fat and abdominal fat. This study was accomplished in a completely randomized design with total four hundred forty eight 1 day old broilers. Chickens were randomly assigned to 7 dietary treatments (control and 15, 30 g kg-1 kaolin, bentonite and zeolite) with four replicates per treatment and sixteen birds per replicate. Intramuscular fat and abdominal fat were lower in treatments with 15 g kg-1 bentonite and kaolin compared with control treatment (p<0.05). The ash content of meat in treatment containing 30 g kg-1 zeolite was significantly (p<0.05) higher compared to treatment containing 15 g kg-1 bentonite and control. Meat moisture and protein content did not differ significantly (p>0.05) between experimental treatments. It may be concluded that inclusion of kaolin, bentonite and zeolite as feed additive in broiler diet have positive influence on chemical composition of meat.
  M. Azadegan Mehr , M. Shams Shargh , B. Dastar , S. Hassani and M.R. Akbari
  A feeding trail was conducted to evaluate the effects of different levels of dietary protein and protexin (a commercial probiotic compound) on broiler performance. In a completely randomized design with 2 x 3 factorial arrangement, 360 male broiler chicks were divided into 24 groups, 15 chicks per. Treatments consisted of combination of two levels of protein (NRC and 90% of NRC) and three levels of protexin (without protexin, the recommended level and 120% of recommended level). All of the diets were formulated according to the NRC tables except for protein. Protexin significantly (P<0.05) increased weight gain in growing as well as the whole production period. Feeding protexin at 120% of the recommended level caused a significant improvement in feed conversion ratio compared to the control group. Protexin had no significant effect on feed consumption, carcass percentage, abdominal fat and the cost of consumed feed. Decreasing dietary protein caused a significant decrease in feed cost (P<0.05). Inclusion of protexin into diet at 120% of the recommended level significantly (P<0.05) decreased feed cost per kilogram of live weight gain.
  O. Ashayerizadeh , B. Dastar , M. Shams Shargh , E. Rahmatnejad and A. Ashayerizadeh
  This experiment was conducted for investigation, the influence of prebiotic, garlic powder and turmeric powder on interior organs and hematological indices of broilers. Based a randomized completely design, 240 days old Ross 308 broilers were distributed into 16 floor pens and reared for 42 days. A basal diet was formulated according to NRC recommendations for starter (0-21 days) and grower (22-42 days) periods. The basal diet was also supplemented with prebiotic Biolex-MB, garlic powder and turmeric powder, resulting 4 dietary treatments were prepared including control group. Each dietary treatment was fed ad-libitum to 4 replicates group of 15 birds at the bigining of rearing period. The lowest (p<0.05) abdominal fat percent and serum cholesterol and triglycerides levels were recorded for broilers fed the diet supplemented with Biolex-MB and garlic powder, While, the highest High Density Lipoprotein (HDL) was recorded for birds fed diet supplemented with garlic powder. Inclusion of Biolex-MB and garlic powder into the diets significantly decreased concentration of Low Density Lipoprotein (LDL) and Very Low Density Lipoprotein (VLDL) in serum (p<0.05).
  O. Ashayerizadeh , B. Dastar , M. Shams Shargh , A. Ashayerizadeh , E. Rahmatnejad and S.M.R. Hossaini
  This experiment was conducted for comparison, the effect of garlic powder, black cumin seeds powder and wild mint powder on performance and carcass characteristics of broiler chickens. Based a randomized completely design, 320 days old Ross 308 broilers were distributed into 16 floor pens and reared for 42 days. A basal diet was formulated according to NRC recommendations for starter (0-21 days) and grower (22-42 days) periods. The basal diet was also supplemented with garlic powder, black cumin seeds powder and wild mint powder, resulting 4 dietary treatments were prepared including control group. Each dietary treatment was fed ad-libitum to 4 replicates group of 20 birds at the bigining of rearing period. There were no significant differences in feed consumption at all of treatments in rearing period (p>0.05). The birds fed the diet containing black cumin seeds powder had the highest body weight gain as compared with other treatments (p<0.05). The best Feed Conversion Ratios (FCR) was recorded with birds fed diets contained black cumin seeds powder compared with control and other groups through all growing periods (p>0.05). The lowest (p<0.05) abdominal fat percent were recorded for broilers fed the diets supplemented with garlic powder and black cumin seeds powder (p<0.05). Also, the highest carcass percent were recorded for birds fed diets supplemented with black cumin seeds powder and garlic powder (p<0.05). The percent of breast in birds received black cumin seeds powder significantly was higher than wild mint and control groups (p<0.05). The percent of thigh was not affected with feed treatments (p>0.05).
  O. Ashayerizadeh , B. Dastar , M. Shams Shargh , A. Ashayerizadeh and M. Mamooee
  This experiment was conducted for comparison the effect of some feed growth promoter additives on carcass characteristics, internal organ weights and hematological indices of 21 days old broiler chickens. Based a randomized completely design, 300 days old Ross 308 broilers were distributed into 30 floor pens and reared for 21 days. A basal diet was formulated according to NRC recommendations for starter (0-21 days) period. The basal diet was also supplemented with antibiotic (Flavomycin), probiotic (Primalac), prebiotic (Biolex-MB) and mixture of primalac plus Biolex-MB (as synbiotic), resulting 5 dietary treatments were prepared including control group. Each dietary treatment was fed ad libitum to six replicates group of 10 birds at the bigining of rearing period. The highest (p<0.05) thigh percent was recorded for broilers fed the diet supplemented with Flavomycin, meanwhile the lower values were shown for birds fed diet supplemented with primalac. The percent of abdominal fat followed the same trend. Compared with control birds group, all other treatment groups fed growth promoter diets improved the percent of heart, but these differences were significant (p<0.05) only for biolex-MB and mixture of primalac plus biolex-MB group treatments. The percent of bursa of fabricius in primalac and mixture of primalac plus biolex-MB supplemented groups were significantly (p<0.05) higher than those in control group. The highest cholesterol concentrations were recorded for birds fed both control and diet supplemented with flavomycin groups while least concentration was found for birds fed diet supplemented with primalac.
  H. Mohebodini , B. Dastar , M. Shams Sharg and S. Zerehdaran
  The present study was conducted to compare the effect of early feed restriction and meal feeding on performance, carcass characteristics and blood constituents of male broilers. Birds fed ad libitum for the 1st week post hatch. Feed restriction schedule was applied from 7-14 or 7-21 days of age. Chickens in treatment 1 fed ad libitum (AL) throughout the experiment. Birds in treatment 2 and 3 were subjected to Quantitative Feed Restriction based on Maintenance (QFRM) or 50% of Growth (QFRG) energy requirements. Birds in treatment 4 and 5 were subjected to quantitative feed restriction based on a meal feed schedule from 7-14 (MF 14) or 7-21 (MF 21) days of age. Five replicate groups of 12 broilers were allocated to each treatment. Results indicated that feed restriction reduced weight gain compared to AL or MF regimes (p<0.05) at the end of experiment. Broilers subjected to feed restriction regimes consumed less feed than either AL or MF (p<0.05). There were no significant differences between MF and AL groups for weight gain and feed intake. At the end of experiment, feed conversion was improved for birds in MF 14. The carcass weight of the control group significantly was higher than feed restricted groups, but was not statistically different from MF groups. Abdominal fat weight was not affected by feeding regimes. Blood constituents, such as triacylglycerol, cholesterol and LDH were affected by feeding regimes (p<0.05). The results of present experiment indicated that quantitative feed restriction from 7-14 days of age resulted to decrease performance and carcass weight in broiler chickens. Meal feeding from 7-14 or 7-21 days of age had no negative effect on the performance and carcass weights of broiler chickens. Lactate dehydrogenase activity was reduced in feed restriction and MF 21 broilers compare to AL broilers.
  M. Falaki , M. Shams Shargh , B. Dastar , S. Zerehdaran and M. Khomairi
  Effects of a probiotic (PRIMALAC) and a prebiotic (FERMACTO) on performance, ileum and crop microbial flora and carcass characteristics have been examined on 480 1 day old Ross 308 broiler chicks. The experiment carried out in a factorial design including three levels of FERMACTO (0, 1 and 2 g ton-1) and two level of Perimalac (0 and 900 g ton-1). Each of treatment was allocated to 5 replicates of 16 male broilers and reared for 42 days. The microflora population in crop and ileum parts was measured on appropriate bacteriological media. Results of experiment indicated that application of primalc (900 g ton-1) significantly improved body weight gain and feed conversion ratio (p<0.01). Feed consumption and feed conversation ratio were not affected with supplementation of different levels of FERMACTO. The percent of carcass, thigh, breast and abdominal fat were not affected by treatments. Coliform counts in the ileum of birds receiving PRIMALAC (900 g ton-1) and FERMACTO (2000 g ton-1) were significantly lower than those of the control birds (p<0.05). Different levels of PRIMALAC or FERMACTO had no effect on total bacteria counts in the ileum and crop parts. In 3rd week of rearing periods, the highest significant (p>0.05) value of lactobacilli population was recorded for broilers fed diet supplemented with PRIMALAC (900 g ton-1) but different levels of FERMACTO relatively increased lactic acid bacteria population in crop. The results of present study revealed that these feed additive by acting on microbial population of digestive system significantly (p<0.05) affects broiler performance.
  M. Falaki , M. Shams Shargh , B. Dastar , S. Zerehdaran and M. Khomairi
  Effects of a probiotic (PRIMALAC) and a prebiotic (FERMACTO) on performance, ileum and crop microbial flora and carcass characteristics have been examined on 480, 1 day old Ross 308 broiler chicks. The experiment carried out in a factorial design including three levels of FERMACTO (0, 1 and 2 g ton-1) and two level of PRIMALAC (0 and 900 g ton-1). Each of treatment was allocated to 5 replicates of 16 male broilers and reared for 42 days. The microflora population in crop and ileum parts was measured on appropriate bacteriological media. Results of experiment indicated that application of primalc (900 g ton-1) significantly improved body weight gain and feed conversion ratio (p<0.01). Feed consumption and feed conversation ratio were not affected with supplementation of different levels of FERMACTO. The percent of carcass, thigh, breast and abdominal fat were not affected by treatments. Coliform counts in the ileum of birds receiving PRIMALAC (900 g ton-1) and FERMACTO (2000 g ton-1) were significantly lower than those of the control birds (p<0.05). Different levels of PRIMALAC or FERMACTO had no effect on total bacteria counts in the ileum and crop parts. In 3rd week of rearing periods, the highest significant (p>0.05) value of lactobacilli population was recorded for broilers fed diet supplemented with PRIMALAC (900 g ton-1) but different levels of FERMACTO relatively increased lactic acid bacteria population in crop. The results of present study revealed that these feed additive by acting on microbial population of digestive system significantly (p<0.05) affects broiler performance.
  M. Falaki , M. Shams Shargh , B. Dastar and S. Zerehdaran
  An experiment was conducted to evaluate the effects of different levels of probiotic and prebiotic on growth performance and carcass characteristics of broiler chickens. About 480 sexed male Ross 308 hybrid chickens were used. The birds were assigned six treatment groups in a randomized complete block design. Each treatment allocated to 5 replicates of 16 male broilers and reared for 42 days. The broiler chickens were grown on starter (0-21 days) and grower (22-42 days) diets calculated to meet NRC recommendations and supplemented with different levels of probiotic PRIMALAC (0, 900 g ton-1) and prebiotic FERMACTO (0, 1000 and 2000 g ton-1). Body weight and feed consumption were determined weekly during the study. Each dietary was fed ad libitum in the whole of experiment. The result of present study showed that the interaction effect between different levels of PRIMALAC and FERMACTO was significant. The highest value of body weight gain was recorded for broilers fed the diet supplemented with mixed of PRIMALAC (900 g ton-1) and FERMACTO (2000 g ton-1) (p<0.05). Lowest feed conversion ratio was belonging to prebiotic (2000 g ton-1) group and caused more efficient feed intake. The highest significant (p<0.05) value of carcass and breast were recorded for broilers fed diet supplemented with mixing PRIMALAC and FERMACTO. The percent of carcass, thigh and abdominal fat were not affected by treatments. The results of present study revealed that supplemented diets with mixed of PRIMALAC and FERMACTO (symbiotic) as growth promoters appeared to be superior compare to use alone and improve broiler chickens growth indices.
  M. Safaei Katouli , F. Boldaji , B. Dastar and S. Hassani
  An experiment was conducted to study the effects of different levels of kaolin, bentonite and zeolite on broiler performance in 6 weeks. Four hundred and forty eight day-old broilers of male Ross 308 strain were allocated to 7 treatments with four replications and 16 broilers in each. The experiment was carried out in a completely randomized design. Treatments were control and 1.5, 3% of kaolin, bentonite and zeolite. Treatments with 3% zeolite and bentonite was significantly (p<0.05) increased weight gain during the 1st and 6th weeks, 1.5% kaolin and zeolite, significantly (p<0.05) increased weight gain in 5th and 6th weeks compared to the control, respectively. Treatments 1.5% bentonite in 4th and 5th weeks and 1.5% zeolite and 3% bentonite in 5th week was significantly (p<0.05) increased feed intake compared to the control. Feed conversion ratio in diets with 3% kaolin in the 1st and 2nd weeks and 3% zeolite in the 1st week was significantly (p<0.05) improved compared to the control. There was no significant (p>0.05) differences in internal organs and fecal pH between trial groups and control. Fecal moisture in treatments with 1.5% kaolin, 3% bentonite and zeolite was significantly (p<0.05) different from control. Growth rate in treats containing 3% kaolin at 0-3 week and 1.5% zeolite, 1.5% kaolin and 3% kaolin, bentonite and zeolite at 0-6 week was more than control (p<0.05). The results demonstrated that adding silicate minerals in diet, improve performance of broiler chickens.
  A. Shabani , B. Dastar , M. Khomeiri , B. Shabanpour and S. Hassani
  This experiment was conducted to evaluate the efficiency of nanozeolite against aflatoxicosis in broiler chickens. For this purpose, 336 male Ross 308 day old broiler chickens were allocated to 6 dietary treatments, including a control corn-soybean meal diet without Aflatoxin (AF) and Nanozeolite (NZ) and five diets contaminated with 500 ppb AF and containing 1 of 5 levels of zero, 0.25, 0.5, 0.75 and 1% Nanozeolite (AFNZ0, AFNZ0.25, AFNZ0.5, AFNZ0.75 and AFNZ1, respectively). Data were analyzed as a completely randomized design with 4 replications and 14 birds per repetition. The results showed that the lowest weight gain and feed intake and the highest feed conversion ratio were related to diet containing 500 ppb AF without NZ (AFNZ0 diet). The birds were fed AFNZ0 showed lower weight gain in 2nd, 3rd and 4th weeks in comparison with control diet (p<0.05). AF led to reduce feed intake and increase feed conversion ratio in 3rd week (p<0.05). No significant differences observed between control diet and contaminated diets containing different levels of NZ for body weight gain, feed intake and feed conversion ratio at all weeks. Serum total protein, cholesterol and triglyceride concentrations were significantly lower in AFNZ0 compared to control diet (p<0.05). There was no significant difference between dietary treatments for serum albumin. These findings confirm that at least 0.25% NZ is sufficient to reduce the toxicity of AF in broiler chickens.
  R. Mirshekar , B. Dastar and B. Shabanpour
  This study evaluated the effect of addition some plant extracts and ascorbic acid in presence of distilled water as the control on the broiler thigh meat color, subsequent lipid oxidation (TBARS) and rancidity development during frozen storage of chicken thigh meat. All the extracts were used in the density of 1000 ppm. The results showed that all the antioxidants had significant effect on lipid oxidation as measured by TBARS value during frozen storage at -20°C for 120 days. However, lipid oxidation only occurred to a limited extent and was insufficient to cause rancid flavor development. The results also demonstrated that rosemary and green tea were the most effective antioxidants in stabilization of a* value. Echinacea, green tea and rosemary extracts were effective antioxidants and strongly inhibited oxidation. Present findings show that these plants extracts exhibit greater antioxidant efficiency compared to ascorbic acid.
  M. Mehdipour , M. Shams Shargh , B. Dastar and S. Hassani
  This experiment was conducted to evaluate the effects of different levels of Hatchery Wastes (HW) on performance, tibia ash, blood calcium and phosphorus concentrations in broiler chickens. Birds were fed a corn-soybean meal diet for 7 days. The experimental treatments included a corn soybean meal diet and 3 other treatments containing 1.5, 3.0 and 4.5% HW. five replicate groups of 15 Ross 308 broiler chicks were allocated to each dietary treatment. Data were analyzed in a completely randomized design. Results indicated that there were no significant differences in weight gains among different dietary treatments. Feed intake in the 4.5% treatment was significantly higher (p<0.05) and 3% treatment had lower feed intake than the other treatments. The results indicated that feed conversion in the 3% HW treatment was lower in most of the period (p>0.05). Results of carcass analysis showed no significant differences between treatments. Also, there were no significant differences between blood calcium and phosphorous among treatments. The 4.5 and 3.0% hatchery wastes treatments had the highest tibia ash (p<0.05). Based on the result of this experiment, the utilization of hatchery wastes as much as 3% can increase tibia strength without having adverse effect on broilers performance.
 
 
 
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