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Articles by M.R. Ghorbani
Total Records ( 5 ) for M.R. Ghorbani
  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.
  A. Azarnik , M. Bojarpour , M. Eslami , M.R. Ghorbani and K. Mirzadeh
  The effect of different levels of diet protein and feed restriction was studied in broiler chicken. A total of 240 (Ros-308) day-old broiler chickens were randomly assigned to nine treatments each in 3 replicates of 10 birds per pen. The 2 protein level, 4 feed restriction level were used in 2x4 factorial arrangements in isoenergitic diets. The experiments lasted for 6 weeks. The feed consumption, body weight gain and Feed Conversion Ratio (FCR) were measured weekly. At the end experiment tow chickens from per pen were randomly selected, weighted, slaughtered and used to determine body parameters and data analysed. Feed restriction reduced significantly (p<0.05) body weight gain and feed consumption. Feed restriction had no significant effect on FCR. Diet protein level had no significant effect on performace. Feed restriction reduced carcass weight, breast weight and tigh weight.
  M. Danesh Mesgaran , T. Mohammadabadi , M. Chaji and M.R. Ghorbani
  This experiment was conducted to evaluate the effect of exogenous enzyme (3 g kg-1 DM), formaldehyde (30 and 60 g kg-1 DM) and or sodium hydroxide (40 g kg-1 DM) on in vitro gas production parameters of sunflower meals (25 and 165 g fat kg-1 DM) were with gas production technique and using fistulated sheep rumen fluid. Kinetics of gas production was fitted to an exponential model. Sodium hydroxide and enzyme treatments significantly increased gas production (B), Metabolizable Energy (ME), Organic Matter Digestibility (OMD), Net Energy Lactation (NEL), ammonia-N (NH3-N) and Short Chain Fatty Acid (SCFA) but formaldehyde decreased them. The lowest of gas production was estimated for low fat sunflower meal treated with 60 g formaldehyde/kg DM (75.9 mL/500 mg DM). There was significant difference among samples for gas production rate Constant (C). Sodium hydroxide treated high fat sunflower meal had the highest of ME, OMD, NEL and SCFA (35.8 MJ kg-1 DM, 207.5 g kg-1 OM, 2.42 Mcal kg-1 DM and 1.53 μmol L-1, respectively). Ammonia-N concentration of high fat sunflower meal were the highest (40.9 mg/100 mL). The values of B, ME, OMD, NEL, NH3-N and SCFA for low fat sunflower meal was less than high fat sunflower meal. The results showed, it may be that gas production parameters of low fat and high fat sunflower meal are influenced by exogenous enzyme, formaldehyde and NaOH.
  A. Heydari , M. Eslami , H. Roshanfekr , M. Bojarpur and M.R. Ghorbani
  An experiment was conducted to evaluate the effects of different levels of Calcium Soap Unsaturated Fatty Acids (CSUFA), with supplemental α-tocopheryl acetate (α-Toc) on laying hen’s performance and egg yolk cholesterol. Ninty six Leghorn hens (Hy-Line), from 38-46 weeks of age were used in a 2x3 factorial arrangement with tow levels of vitamin E (0 or 1000 mg kg-1 of diets) and three levels of CSUFA (0, 2 and 4% of diets) in a completely randomized design with six treatments and four replicates and four hens per replicate. Feed Intake (FI), Egg Production (EP), Egg Weight (EW), Yolk Weight (YW), Shell Thickness (ST), Haugh Unit (HU), Yolk Cholesterol (YC) and Feed Conversion Ratio (FCR) were measured. The result of this experiment indicated that EW, YW, FI, FCR were significantly (p<0.05) affected by fat levels. FI and FCR were decreased with fat levels from 0-4%. Different levels of dietary vitamin E had no significant effect on FI, EP, FCR, EW, YW, ST, HU and YC (p>0.05).
  A. Heydari , M. Eslami , H. Roshanfekr , M. Bojarpur and M.R. Ghorbani
  An experiment was conducted to evaluate the effects of different levels of Calcium Soap Unsaturated Fatty Acids (CSUFA), with supplemental α-Tocopheryl acetate (α-Toc) on laying hen’s performance and egg yolk cholesterol. About 96 Leghorn hens (Hy-Line), from 38-46 weeks of age were used in a 2x3 factorial arrangement with tow levels of vitamin E (0 or 1000 mg kg-1 of diets) and three levels of CSUFA (0, 2 and 4% of diets) in a completely randomized design with six treatments and four replicates and four hens per replicate. Feed Intake (FI), Egg Production (EP), Egg Weight (EW), Yolk Weight (YW), Shell Thickness (ST), Haugh Unit (HU), Yolk Cholesterol (YC) and Feed Conversion Ratio (FCR) were measured. The result of this experiment indicated that EW, YW, FI, FCR were significantly (p<0.05) affected by fat levels. FI and FCR were decreased with fat levels from 0-4%. Different levels of dietary vitamin E had no significant effect on FI, EP, FCR, EW, YW, ST, HU and YC (p>0.05).
 
 
 
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