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Articles by A. Hassanabadi
Total Records ( 7 ) for A. Hassanabadi
  A. Hassanabadi and H. Nassiri Moghaddam
  An experiment was conducted to evaluate the effect of early feed restriction on performance characteristics and serum thyroxin of broiler chickens. The experiment was designed in a 2 x 2 factorial with 5 replicates of floor pens with 12 male or female chicks in each. 240 male and/or female day-old chicks were weighted and randomly allocated to two treatment groups of each sex. Two treatments involved, control group and restricted group, which were fed a mixture of 50:50 rice hulls and commercial starter diet with supplementation of trace minerals and vitamin premixes from 4 to 11 days of age. All groups were fed the same starter, grower and finisher diets from 11 to 56 days of age. Live body weight of restricted birds was compensated on day 42 of age and was numerically more than restricted group at 49 and 56 days of age. Daily feed intake up to 42, 49 and 56 days of age wasn`t affected by treatments. Feed efficiency in the restricted birds was significantly (p< 0.05) better than of control birds up to 56 days of age. Among the body composition, only carcass fat content of restricted birds was significantly (p< 0.05) lower than of control birds. Abdominal fat pad percent of restricted birds at 49 and 56 days of age was significantly (p< 0.05) lower than of control birds. T4 concentration on day 11 in restricted group was significantly (p< 0.05) lower than control group. Its concentration during accelerated growth period was not significantly (p>0.05) more than control group.
  A. Hassanabadi , A. Golian and H. Nassiri-Moghaddam
  An experiment was conducted to evaluate the effects of D-Thyroxine (T4) on compensatory growth of broiler chickens. The experiment was designed in a 25 factorial with 5 replicate pens of 12 male or female chicks each. Six hundred male and/or female day-old chicks were weighed and randomly allocated to 5 treatment groups of each sex. Five treatments including: A control (C, with no feed restriction and T4) and 4 restricted groups which were fed a mixture of 50:50 rice hulls and a starter diet with supplementation of trace minerals and vitamins from 4-11 days of age. All groups were fed similar diets from 11-56 days of age, with the exception that the diets of 4 restricted groups R0, R1, R2 and R3 were supplemented with 0, 1, 2 and 3 ppm T4 from 11-28 day, respectively. The lowered LBW of` R0 birds was compensated at 42 day, whereas the LBW of R1, R2 and R3 treated birds was decreased as the level of T4 was increased. The LBW of R1 and R2 treated birds were similar at 49 day and this was lower than (p<0.05) the C and R0 birds. Among the T4 treated birds, only the R1 birds could complete a compensatory growth at 56 day. The LBW of R0 birds was numerically higher than of C birds at 56 day. The FI of birds with the exclusion of ground rice hulls was not different (p>0.05) among the C, R0 and R1 birds during 1-42 or 49 and/or 56 day but this FI value was significantly higher than obtained from R2 and R3 birds. The FCR of R0 birds was numerically better than of C or T4 treated birds, whereas all T4 treated birds exhibited a poorer FCR during 1-42 or 49 and/or 56 day. The performance parameters in male chicks were significantly better than of female chicks. Carcass fat content of the R0 treated birds was significantly lower than that of control or other treated birds (p<0.05). Carcass fat content of male chicks was lower than (p<0.05) that of female chicks. AFP of the R0 birds was lower than (p<0.05) that of control or T4 treated birds at 49 day, whereas all birds had a similar abdominal fat at 56 day. Therefore, compensatory growth in broiler chicks can be achieved at 42 day with diet dilution in early of life. The dietary T4 depressed performance characteristics. Serum Thyroxine was increased by feed restriction and reached to normal level when birds were re-fed.
  A. Hassanabadi , H. Amanloo and M. Zamanian
  An experiment was conducted to evaluate the effects of Poultry By-Product Meal (PBPM) as the replacement of soybean meal (SBM) in the diets of broiler chickens on growth performance. Total 360 male Arbor Acers day old broiler chicks with 45 g initial body weight were selected and divided to six dietary treatments. Each treatment involved 5 replicates of 12 chickens. Experimental diets were formulated to be isocaloric and isonitrogenous. The diets involved the levels of 0, 3, 6, 9, 12 and 15% of poultry by-product meal. Chickens were fed the experimental diets from 21-49 days of age. Experimental design was a completely randomized design. Measured traits, in this study, included live body weight, daily weight gain, feed consumption, feed efficiency, percentage of Tibia ash, weight of different body organs and their ratio to live body weight and feed cost per 1 kg weight gain up to 42 and 49 days of age. Results of the present study showed that the use of poultry by-product meal up to 6% had a positive effect on weight gain and feed to gain ratio in 42 and 49 days of age. No significant effect was observed for Tibia ash percentage (p>0.05). Differences for live body weight, feed intake, feed to gain ratio and feed cost per 1 kg of live body weight were significant (p<0.05). Birds fed 6% poultry by-product meal had maximum weight gain, yield and better feed to gain ratio among the treatments in whole experimental period.
  A. Hassanabadi , H. Nassiri-Moghaddam , H. Kermanshahi , F. Eftekhar-Shahroodi and M.D. Mesgaran
  An experiment was carried out to evaluate the effects of microbial phytase on apparent digestibility of Amino Acids (AA) and crude protein in female broiler chickens. The 240 day-old female broiler chicks were wing banded, weighted and randomly allocated to six treatment groups with 4 replicates of 10 chicks in each battery cages appropriate for completely randomized design. The treatments included supplementation of 6 dietary levels of phytase (0, 250, 500, 750, 1,000 and 1,250 FTU kg 1) during 0-28 days of age. All chicks were fed a nutritionally adequate typical commercial broiler starter and grower ration (adequate in phosphorus and calcium). During days 21 to 24 excreta totally were collected for AA and CP analyzing. 250 and 500 FTU kg 1 phytase significantly improved digestibility of amino acids (except than alanine, valine and threonine) and CP (p<0.05). Phytase had no significant effect on live body weight, feed intake and feed efficiency (p>0.05) of the broiler chicks up to 28 days of age.
  A. Hassanabadi
  An experiment was conducted to evaluate the response of broiler chickens to degrees of diet dilution from 4-11 days of age. Broilers were fed conventional broiler diets from 0-4 and 11-42 days of age. From 4-11 days, birds were fed a commercial corn, wheat and soybean meal broiler starter, or the same diet in which major nutrients were replaced with 30, 40, or 50% ground rice hulls. Mineral and vitamin sources were not affected by diet dilution. Each of the 3 diluted diets together with an undiluted diet (control) was fed to 5 replicate floor pen groups of 60 male broilers. Diet dilution resulted in a significant (p<0.05) reduction in body weight at 11 days of age, although by 42 days there was complete recovery of retarded body weight with no change in overall efficiency of feed utilization. Diet dilution had no significant effect (p>0.05) on carcass characteristics at 42 days of age.
  A. Hassanabadi , H. Nassiri-Moghaddam , H. Kermanshahi and G. Golian
  An experiment was conducted to evaluate the effects of microbial phytase on productive traits and apparent digestibility of Amino Acids (AA) in male broiler chickens. The experiment was a completely randomized design. Each treatment consisted of 5 replicates of 12 male broilers, for a total of 300 Ross broiler chicks. Broiler chickens were fed similar diets containing 5 levels of phytase (0, 250, 500, 750 and 1,000 FTU/kg of diet) from 1-28 days of age. Excreta were quantitatively collected from 21-24 days of the experiment. The excreta stored at -20C, freeze-dried and analyzed for amino acids. During the experiment, Body Weight (BW), Average Daily Gain (ADG), Average Daily Feed Intake (ADFI) and Feed Conversion Ratio (FCR) were measured weekly. Total 250 and 500 FTU phytase supplementation significantly increased (p<0.05) apparent AA digestibility. Higher levels of phytase decreased AA digestibility in compare to 250 and 500 FTU. Phytase had no significant effect (p>0.05) on body weight, feed intake and feed efficiency up to 28 days of age.
  A. Hassanabadi , A. Alizadeh-Ghamsari and M.A. Leslie
  An experiment was conducted to evaluate the effects of microbial phytase and dietary Calcium (Ca) and phosphorus levels on productive traits, tibia ash percentage, apparent retention of Ca, tP, N and also on number of blood factors in male broiler chickens. The experiment was a 23 factorial with a completely randomized design. Each treatment consisted of 5 replicates of 12 male broilers, for a total of 360 chicks. Broiler chickens were fed two dietary levels of Ca and nPP (NRC, 1994 recommended levels and 80% of its recommendation levels) and three levels of phytase (0, 300 and 600 FTU kg-1 of diet) from 7-42 days of age. Experimental diets were formulated to be similar nutrients except for Ca and tP. During the experiment Body Weight (BW), Average Daily Gain (ADG), Average Daily Feed Intake (ADFI) and Feed Conversion Ratio (FCR) were measured weekly. Tibia ash percentage and blood serum Ca, P and Alkaline Phosphatase (ALP) were measured at 28 days of age. Nutrient apparent retention was measured at 42 day. Phytase addition increased (p<0.05) BW (21 and 42 day) and ADG during 7-21 and 7-42 days of age. FCR also was improved (p<0.05) during 7-21 and 7-42 day by phytase addition. Neither phytase addition nor Ca and nPP levels had significant effects (p>0.05) on ADFI during the periods of the experiment. Phytase addition decreased (p<0.05) serum ALP linearly and also decreased feed cost/kg BW yield. Low dietary Ca and nPP levels improved BW (21 day), ADG and FCR during 7-21 day (p<0.05). Phytase addition to low Ca and nPP diets was more efficient (p<0.05) than normal Ca and nPP diets on BW, ADG, ADFI, FCR, serum ALP concentration and Ca, tP and N retention. Phytase supplementation increased (p<0.05) serum P concentration, tibia ash percentage and Ca, tP and N retention. Low dietary Ca and nPP levels, increased (p<0.05) serum ALP and Ca, tP and N retention and decreased (p<0.05) serum P concentration. These data indicate that phytase improves BW, ADG, FCR and decreases serum ALP and feed cost/kg BW yield of broiler chickens. Low dietary Ca and nPP levels, regardless to phytase levels, improve BW, ADG and FCR. Phytase addition to low Ca and nPP diets is more efficient than normal Ca and nPP diets on performance and Ca, tP and N retention.
 
 
 
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