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Articles by S.J. Hosseini-Vashan
Total Records ( 2 ) for S.J. Hosseini-Vashan
  S.J. Hosseini-Vashan and N. Afzali
  Ninety-six 26-week-old white leghorn layers (w-36) were fed commercial diets containing 0, 1.5, 3, 4.5% Palm Olein Oil (PO) and the diets were iso-caloric and iso-nitrogenous. Hens randomly assigned to 4 treatment diets, with 3 replicates and 8 layers in each replicate. The experiment was conducted over a period of 12 week in order to study the effects of feeding palm olein oil on hen performance (egg production, egg weight, egg mass, feed intake, feed conversion ratio (FCR) and weight gain) and egg quality parameters (Hough unit score, yolk colour index, yolk index, egg shape, shell weight, shell thickness and density). The yolk of eggs extracted and cholesterol content were determined in each period. Blood samples were collected in non-heparin zed tubes from 6 hens in each treatment by puncturing the bronchial vein at end of experiment and serum was collected after 8-10 h as per standard procedures and was stored for subsequent analysis. Hen performance (egg production, egg weight, egg mass, feed intake and FCR) and egg quality parameters (Haugh unit score, yolk colour index, yolk index, egg shape, shell weight, shell thickness and density) were not significantly (p>0.05) different among treatments except in body weight. The highest and lowest gain body weight was observed on 10% (170 g) and 0% (90 g) PO treatment, respectively (p<0.05). The yolk and blood cholesterol content were increased in 4.5% palm olein oil and the different among palm olein oil levels and control were statistically significant (p<0.05).
  S.J. Hosseini-Vashan , A.R., Jafari-Sayadi , A. Golian , Gh. Motaghinia , M. Namvari and M. Hamedi
  This experiment was conducted to compare the effect of diets with various energy constant ME: CP ratio on performance, nutrients efficiency and carcass characteristics of broiler chickens. In a completely randomized design experiment, five starter, grower and finisher diets were formulated to have 2800, 2,900, 3,000, 3,100 and 3,200 kcal of ME kg-1 whereas the CP in starter diets (0-7 day) were 20.14, 20.84, 21.56, 22.28 and 23%, in grower diets (8-28 days) were 17.5, 18.13, 18.75, 19.38 and 20 and in finisher diets (29-42 days) were 15.75, 16.31, 16.85, 17.43 and 18%, respectively. About 200 day old Arbor acres broiler chickens were randomly assigned to 20 groups of 10 birds each. The ME: CP ratio and other nutrients such as Ca, P and amino acid per CP ratio were fixed over all diets in every period. Feed and water were fed ad libitum. Body weight and feed consumption were measured weekly and carcass characteristics were evaluated at the termination of experiment. Two birds (1 male and 1 female) from each pen were randomly selected and slaughtered to weigh carcass yield, gizzard, heart, liver, abdominal fat, breast meat and thigh meat at the end of experiment. Body weight was greater in birds fed diets contained >3000 kcal kg-1 compared to those fed <3000 kcal ME kg-1. The feed intake was not affected by dietary treatment during growing and finishing periods. Birds fed diets contained lower energy and protein had a higher FCR during all periods. The Energy Efficiency Ratio (EER) and Protein Efficiency Ratio (PER) were decreased in birds fed diets with low CP and ME content during growing period but not affected throughout starter and and finisher periods. Dietary treatments did not influence relative weight of thigh, breast bile, gizzard and abdominal fat but the relative weight of liver and heart increased (p<0.05) when chickens fed diet contained higher ratio of ME: CP. The gender did not affect percentage weight of liver, Gallbladder, gizzard and abdominal fat but the percentage of breast, thigh and heart were influenced by sex of birds. It is concluded that the high nutrients density and high energy diets may improve the nutrients efficiency, carcass characteristics and performance of broiler chickens.
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