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Articles by K. Mirzadeh
Total Records ( 2 ) for K. Mirzadeh
  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.
  K. Mohammadi , M.T. Beigi Nassiri , H. Roshanfekr , K. Mirzadeh and A. Aghaei
  Data from body weights at post-weaning were used to genetic trend for Zandi sheep reared in Khojir breeding station of Tehran-Iran over a 16 years period (1993-2008) using animal model for lambs, rams and ewes. Genetic trends were estimated for 6 Months Weight (6MW), 9 Months Weight (9MW) and Yearling Weight (YW) traits. For investigation of each trait appropriate models using 3-trait analysis were applied. Breeding values of animals were predicted by Best Linear Unbiased Prediction (BLUP) methodology under three-trait animal models. Genetic trends of studied traits were estimated by regressing mean of breeding values on birth year. The genetic trends were positive and significant for 6MW, 9MW and YW and were 21, 72 and 65 g year-1, respectively.
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