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Articles by H. Nassiri-Moghaddam
Total Records ( 3 ) for H. Nassiri-Moghaddam
  M. Mehri , H. Nassiri-Moghaddam , H. Kermanshahi and M. Danesh-Mesgaran
  There is scanty of information on Threonine (Thr) requirements of mixed-sex broiler chickens during the grower period. An experiment was conducted to determine the digestible Thr requirements of straight-run Ross 308 broilers from 15-28 days of age. Basal diet consisting of wheat, triticale and corn gluten meal was formulated to meet or exceed the nutrient requirements except for Thr. Graduation levels of supplemental Thr were added to the basal diet at expense of corn starch generating six treatments to provide a range from 0.46-0.81% of digestible Thr. Both male and female birds were randomized across 48 floor pens (4 replicates and 12 birds per each replicate) in a completely randomized design and each pen was fed one of six amino acid levels from 15-28 days of age. Body weight gain, feed intake, feed conversion, digestible Thr intake and mortality were measured during the experimental period. Body Weight Gain (BWG) and Feed Conversion (FC), Feed Intake (FI) and daily Thr intake responded quadratically to graded levels of digestible Thr (0.46-0.81% of diet). Digestible Thr requirements were estimated using a linear broken-line and quadratic broken-line models. Based on broken-line linear model, digestible Thr requirement for straight-run Ross 308 broilers was determined to be 0.69 and 0.76% for BWG and FC, respectively. However, using broken-line quadratic model, digestible Thr was estimated at 0.79% for BWG.
  M. Mehri , H. Nassiri-Moghaddam , H. Kermanshahi and M. Danesh-Mesgaran
  There is little information on Lysine (Lys) requirements of mixed-sex broiler chickens during the grower period. An experiment was conducted to determine the digestible Lys requirements of straight-run Ross 308 broilers from 15-28 days of age. Basal diet consisting of wheat, triticale and corn gluten meal was formulated to be adequate in all essential amino acids except for Lys. Graduation levels of supplemental Lys-HCl were added to the basal diet at expense of corn starch generating six treatments to provide a range from 0.60-1.20% of digestible Lys. Both male and female birds were randomized across 48 floor pens (4 replicates and 12 birds per each replicate) in a completely randomized design and each pen was fed one of six amino acid levels from 15-28 days of age. Body weight gain, feed intake, feed conversion, digestible Lys intake and mortality were measured during the experimental period. Body Weight Gain (BWG) and Feed Conversion (FC), Feed Intake (FI) and daily Lys intake responded quadratically to graded levels of digestible Lys (0.60-1.20%). Digestible Lys requirements were estimated using a linear broken-line and quadratic broken-line models. Based on broken-line linear model, digestible Lys requirement for straight-run Ross 308 broilers was determined to be 0.95 and 1.08% for BWG and FC, respectively. However, using broken-line quadratic model, digestible Lys was estimated at 1.05% for BWG.
  M.J. Agah , H. Nassiri-Moghaddam , A.M. Tahmasbi and H. Lotfollahian
  An experiment was carried out to determine the influence of feeding different levels of Locally Produced Canola Seed (LPCS) on performance and fatty acid compositions of egg yolk lipid. In a completely randomized design, four treatments including control and three levels of whole canola seed (5, 10 and 15%) were fed to 108 laying hens (Hy-line w-36 at the age of 30 weeks) in four groups with three replications for 12 weeks. Fatty acid compositions of egg yolk were measured at the end of 41 weeks. Usage of LPCS in all levels decreased total amount of saturated fatty acid and the ratio of n-6 to n-3 of the yolk in comparison with control diet. The diets had significant effects on egg shell weight, haugh unit and yolk color index. With 15% LPCS in diet, significantly decreased daily haugh unit in comparison with control diet. Supplementation of LPCS >10% in diet resulted to decreased egg shell weight and yolk color comparing to control diet. There were significant differences in daily feed intake, egg production and egg mass. There was no difference in daily produced egg mass between levels of 5 and 10% LPCS in comparison with control diet (51.94 and 50.57 vs. 51.67). The using of 10% LPCS in diet had the best result between treatments due to better performance and ratio of n-6 to n-3 polyunsaturated fatty acid in egg yolk in comparison with control diet (8.28 vs. 16.94).
 
 
 
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