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Articles by K.H. Mirzadeh
Total Records ( 4 ) for K.H. Mirzadeh
  N. Dabiri , A. Ashayerizadeh , O. Ashayerizadeh , K.H. Mirzadeh , H. Roshanfekr , M. Bojarpour and M.R. Ghorbani
  This study was conducted for comparison the effect of some feed growth promoter additives on performance and gut microflora population of 21 days old broiler chickens. Based on randomized completely design, 300 days old Ross 308 broilers were distributed into 30 floor pens and reared for 21 days. The basal diet was also supplemented with Flavomycin, Primalac, Biolex-MB and mixture of Primalac plus Biolex-MB, resulting 5 dietary treatments were prepared including control group. Each dietary treatment was fed ad-libitum to 6 replicate group of 10 bird at the bigining of rearing period. The result of experiment indicate that diets containing growth promoters improved broilers performance. This improvement was only significant (p<0.05) between control group and both Biolex-MB and synbiotic treatment groups, for body weight gain and between control group and 3 bird groups fed Flavomycin, Biolex-MB and synbiotic dietary treatments for feed conversion raito. Compared with control birds group, all other treatment groups fed growth promoter diets had relatively lower total bacterial population in crop except for Primalac treatment, but this differences was significant (p<0.05) only between Flavomycin and control group treatments. Birds fed diets containing growth promoter had greater lactic acid bacteria populations in crop compared with control group, but this priority was significant (p<0.05) only for synbiotic group. A reversed trend were found for coliforms population in ileum, where all growth promoter groups, except Flavomycin, had significantly (p<0.05) lower population compared with control group. Additionally, such feed additives altered the pH content of crop and ileum.
  S. Sharifi , H. Roshanfekr , S.R. Khatami and K.H. Mirzadeh
  Prolactin is a peptide hormone synthesized by lactotropes of the anterior pituitary. prolactin plays an important regulatory function in milk production and reproduction. Genomic DNA was isolated from blood samples of 84 Najdi cattle. A 156 bp PRL gene exon III segment was amplified by PCR using bovine specific primers. RFLPs in this segment was studied using RsaI restriction enzyme. The frequencies of genotypes were as follows: 0.2857-AA, 0.5714-AB, 0.1429-BB; Frequencies of allele A and B were 0.571 and 0.429 in Najdi Cows.
  A. Ashayerizadeh , N. Dabiri , O. Ashayerizadeh , K.H. Mirzadeh , H. Roshanfekr and M. Mamooee
  This experiment was conducted for comparison the effects of antibiotic (flavomycin), probiotic (primalac), prebiotic (Biolex-MB) and mixture of probiotic and prebiotic (primalac plus Biolex-MB) as dietary growth promoter on growth performance, carcasscharacteristics and hematological indices of broiler chickens. Three hundred day old Ross 308 broilers were equally distributed into 30 floor pens and reared for 42 day. A basal diet was formulated covering the recommendations of NRC (1994) for starter (0-21 days) and grower (22-42 days) periods and considered as control diet. Four tested diets were formulated by supplemented the basal control diet with antibiotic (flavomycin), probiotic (primalac), prebiotic (Biolex-MB) and mixture of primalac plus Biolex-MB, respectively. Six replicates were used for each treatment. The results of present study showed that all growth promoters used was improved growth indices of Ross 308 broilers. The highest significant (p<0.05) values of carcass and thigh were recorded for broilers fed diet supplemented with flavomycin. The highest (p>0.05) value of breast was recorded for broilers fed the diet supplemented with primalac, meanwhile the lower value were showed for birds fed either diet or diet supplemented with Biolex-MB. The percent of carcass and cuts followed the same trend. Hematological parameter including cholesterol was recorded the highest (p>0.05) values groups fed the diets either control or supplemented with flavomycin, meanwhile the lower value was showed for bird fed diet supplemented primalac plus Biolex-MB. Triglycerides and very low density lipoprotein cholesterol (VLDL) were recorded the highest concentration for bird fed both control and diet supplemented with flavomycin groups while least concentration was found for bird fed diet supplemented with primalac. The results of present study revealed that probiotic and prebiotic as growth promoters can use as alternatives non-antibiotic feed additives to their free harmful side effects on the consumers and to improve broiler chickens growth indices.
  M. Baghaei , A. Ashayerizadeh , M. Eslami , M. Bojarpour , H. Roshanfekr and K.H. Mirzadeh
  An in vivo experiment was conducted to determine the effect of dietary betaine supplementation as a replacement for methionine on broiler performance and carcass characteristics. Three hundred day old Ross 308 broilers were used in a randomized completely design with 4 treatment and 5 replicates in each treatment and 15 birds/replicates and reared on the floor pens for 42 days. A basal diet was formulated as control according to NRC, recommendations for starter (1-21 days) and grower (22-42 days) periods. In experimental diets, methionine levels were as formulated (control (T1)) and at 90 (T2), 80 (T3) and 70% (T4) of the control. The incompleted levels of the methionine in T2, T3 and T4 supplemented by adding Betafin to the diets. The result of present study indicated that feed intake was no affected by treatments (p>0.05). The birds under T2 and T4 had lower body weight gain during 1-42 days as compared with control group. Also, the using of T4 in both of 22-42 and 1-42 days and T2 in 1-42 days significantly resulted to undesirable feed conversion ratio (p<0.05). Supplementation levels of betafin in diets no significantly (p<0.05) affected the amount of carcass and its cuts (p>0.05), except the percent of thigh was significantly higher than control group (p<0.05).
 
 
 
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