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  1 - Effect of replacing dietary levels of soybean meal with rapeseed meal on broiler chicks
  Jaber Davoodi Shahram Golzar Adabi Seyyed Yousef Haji asghari Golam Ali Moghaddam Ali Faramarzi
  An experiment was conducted in order to study the effect of replacing soybean meal with rapeseed meal on performance, organs weight, blood biochemical parameters, methabolisable energy, and glucosinolates and erucic acid rate as a completely randomized design with 6 die More

  An experiment was conducted in order to study the effect of replacing soybean meal with rapeseed meal on performance, organs weight, blood biochemical parameters, methabolisable energy, and glucosinolates and erucic acid rate as a completely randomized design with 6 dietary treatments, 4 replicates with 15 bird in each replication. Three hundred and sixty one-day-old female Cobb hybrid broiler chicks were used. Methabolisable energy, glucosinolates and erucic acid content of meal were determined. rapeseed meal was replaced instead of soybean one with the levels of 0 (control), 20, 40, 60, 80 and 100 percent. In all of the diets, 0.05 percent multi enzyme (Kemin®) was used. Feed intake, body weight gain and feed conversion ratio were determined at the days 0-21, 21-49 and in the whole period. Morever the values of relative weight of liver, pancreas, ingluvies, gizzard, serum concentrations of triiodothronine and thyroxine were determined at 49 days of age.  Sas software and Duncan’s test was used for analysis of variance and comporison of means, respectively. Chemical analysis of meal showed that the amount of the aliphatic glucosinolate and erucic acid of rapeseed were higher than the amount of that in canola meal. The feed conversion ratio of 60, 80 and 100 percent replacement were statistically different (P<0.01) from the control, 20 and 40 percent treatments. The results of statistical analysis indicated that there was no significant effect of rapeseed meal levels on relative weight of gizzard, ingluvies and pancreas, but significant effect on relative weight of heart and liver in 80 and 100 percent treatments was sean (P<0.05). The lowest blood serum concentration of triiodithyronine and thyroxine hormone in chicks were observed at 80 and 100 percent trearments (P<0.01). The results also showed that 40% of soybean meal can be replaced with rapeseed one in the broiler chick diets, but improving of meal quality is necessary for higher levels of replacement. Manuscript profile