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Articles by Majid Toghyani
Total Records ( 7 ) for Majid Toghyani
  Majid Toghyani , Ali Khodami and Abbas Ali Gheisari
  This study examined the effect of different levels of dietary organic and inorganic chromium (Cr) on meat quality of broiler chicks reared under heat stress condition. Four hundred and twenty Ross male chickens in heat stress condition (33±3°C) were allocated to seven treatments in a completely randomized design. Treatments were supplemented with 0 (control), 500, 1000 or 1500 mg kg-1 Cr in the form of Cr nicotinate and Cr chloride. Twelve chicks from each treatment were slaughtered at 42 d, to evaluate moisture, protein, lipid, pH and lipid oxidation of thigh and breast meat. Moisture, lipid and pH of meat were not affected by supplemental Cr. Breast meat protein was significantly (p<0.05) increased by the Cr supplementation especially organic Cr. Storage time increased lipid oxidation of meat (p<0.01). Lipid oxidation of breast and thigh muscle for two days of storage were affected by supplemental Cr and decreased (p<0.05). Results of the present study showed that supplementation of diet with Cr can improve the meat quality of broiler chicks in heat stress condition.
  Majid Toghyani , Mohammad Ali Zia , Sayed Ali Tabeidian , Gholamreza Ghalamkari and Abasali Gheisari
  The objective of this study was to assess fear responses of broiler chicks to vitamin C, different shackling and crating times in preslaughter. In this study, tonic immobility (TI) was used as an index of fear reactions. At 42 d of age, 80 male broiler chicks were randomly selected for 8 treatments in the experiment. The treatment included treated and untreated vitamin C for two shackling times (60 and 120 s) and subsequently two crating times (2 and 4 h). The equal numbers of birds were provided drinking water containing either 0 or 1000 ppm of L-ascorbic acid for 36 h. The TI was determined following the crating. Vitamin C and handling time resulted in a significant reduction in duration of TI in broilers drank treated water with vitamin C and for 60 s shackling times (p<0.05). Time of the crate had no significant effect on the duration of TI (p>0.05). Number of attempts to induce TI were not affected by vitamin C, shackling and crating time (p>0.05). It was concluded that the use of vitamin C in drinking water during 36 h preslaughter may offer a practical method for alleviating underlying fearfulness and enhancing poultry welfare.
  Mohammad Khani , Majid Toghyani and Marjan Foroughi
  The present study was carried out to evaluate the effect of different levels of acid whey powder (AWP) and low lactose acid whey powder (LLAWP) on growth performance and immunity of broiler chicks. A total of 416 one-day old broiler chicks (Ross 308) were randomly allocated to 1 of 8 isocaloric and isonitrogenous dietary treatments (4 pen replicates; 13 birds per pen) and grown over a 42-d experimental period. The Dietary treatments included control, 1, 2.5, 5, 7.5% AWP and 2.5, 5 and 7.5% LLAWP. Body weight gain (BWG), feed intake (FI) and feed conversion ratio (FCR) were recorded biweekly throughout 42 d. Antibody titers against Newcastle and influenza viruses and sheep red blood cells (SRBC) were determined to evaluate immune responses. In overall growth period, BWG in broilers received 2.5 or 5% LLAWP significantly increased and FCR in those fed 2.5% LLAWP decreased (p<0.05). Broilers received 5% LLAWP had the greatest FI in overall growth period (p<0.05). Lymphoid organs weight and antibody titers against Newcastle and influenza viruses and SRBC were not affected significantly by dietary treatments (p>0.05). It was concluded that, 2.5% dietary LLAWP improved performance and AWP could be used up to 5% in diet without adverse effects on performance and immunity of broiler chicks.
  Farshid Kheiri and Majid Toghyani
  This experiment was conducted to investigate the effect of different levels of chromium chloride on performance and immune responses of broiler chicks. Three hundred and one days old broilers (Ross 308) were allocated to five treatments with four replicates in a completely randomized design. Treatments supplemented with 0 (control), 400, 800, 1200 or 1600 μg kg-1 chromium in the form of chromium chloride. Body weight, feed intake and feed conversion were measured in different periods. At 18 and 28 days serum antibody titres against newcastle and influenza virus were determined. At 42 days, heterophil to lymphocyte and albumin to globulin ratios were measured. Lymphoid organs and carcass traits were measured at 42 days. Body weight improved significantly (p<0.05) in broilers fed 1600 μg kg-1 supplemental chromium. Feed intake, feed conversion, lymphoid organs and carcass traits (except of carcass yield) were not affected by supplemental chromium (p>0.05). Antibody titres against newcastle virus in broilers received 1600 μg kg-1 chromium supplementation were elevated (p<0.05). Heterophil to lymphocyte and albumin to globulin ratios were not affected by dietary chromium (p>0.05). The results of this experiment indicated that chromium supplementation improved body weight, carcass yield and antibody titre against Newcastle virus in broiler chicks.
  Amir Naghieh , Majid Toghyani , Abbas Ali Gheisari , Shahin Eghbal Saeed and Hadi Miranzadeh
  This study was conducted to evaluate the effect of different sources of chromium supplementation on performance and immune responses of broiler chicks. Four hundred and thirty two broiler chicks (308 Ross) were randomly allocated to 9 treatments and 4 replicates in a completely randomized design. Treatments consisted of: Control group, Cr-chloride, Cr -yeast, Cr -nicotinate and Cr-methionine at two levels of 600 and 1200 μg kg-1 Cr-supplementation. Feed intake, weight gain and feed conversion ratio measured in different periods. Antibody titers against Newcastle and Influenza virus were measured at 20 and 31 days and serum albumin to globulin ratio at 31 days. Results showed feed intake and body weight of broilers received 600 μg kg-1 Cr-nicotinate were significantly increased (p<0.05). Supplemental Cr had not significant effect on feed conversion ratio. Broilers were fed 1200 μg kg-1 Cr-methionine and 600 μg kg-1 Cr-chloride had the highest carcass yield and the lowest abdominal fat respectively (p<0.05). Antibody titers against Newcastle and Influenza viruses were elevated in broilers received 1200 and 600 μg kg-1 Cr-nicotnate, respectively. The results of this experiment showed between different Cr-sources were used in this study Cr-nicotinate improved feed intake, body weight and antibody titer in broiler chicks.
  Sayed Ali Tabeidian , Mehdi Toghyani , Majid Toghyani and Ahmadreza Shahidpour
  This experiment was carried out in order to determine the nutritional value of Dried Tomato Pomace (DTP) and the impact of its incremental levels with and without enzyme supplementation on broilers growth performance and ileal protein digestibility. About 384 days old broiler chicks (Ross 308) were raised together until day 7. At 7 days of age chicks were randomly allocated to one of eight treatments with 4 replicates of 12 birds each according to factorial arrangement based on a completely randomized design. Treatments included 0, 3, 6 and 9% of DTP for starter period (7-21 days); 0, 6, 9 and 12% for grower period (21-42 days) and 0, 9, 12 and 15% for finisher period (42-49 days) with and without enzyme supplementation. Body weight gain and feed intake of chicks were recorded at the end of each period and calculated for entire experimental period. Food conversion ratio was also calculated for different periods. At 49 days of age, two male birds per replicate were slaughtered for determination of protein digestibility by chromium oxide marker. Increasing DTP in none-enzyme supplemented treatments resulted in a significant reduction of daily weight gain (p<0.05). Birds fed DTP added diets had a marked (p<0.05) higher daily feed intake at 21-42 days period but enzyme supplementation reduced feed intake. The overall FCR of the experiment was significantly influenced by increasing the inclusion rate of DTP, so that chicks in control group exhibited the most efficient (p<0.05) FCR. Enzyme supplementation improved FCR in different periods compared to none-supplemented groups. Treatments failed to have any statistical (p>0.05) impact on carcass characteristics. There was no deleterious impact of experimental diets observed on ileal protein digestibility. The obtained results suggest that DTP along with enzyme supplementation could be incorporated in broilers diet up to 3, 6 and 9% for starter, grower and finisher periods, respectively without any adverse effect on performance and carcass characteristics.
  Mohammad Mohammadrezaei , Majid Toghyani , Abbasali Gheisari and Mehdi Toghyani
  Fast growth rate is one of the main characteristics of broiler chicks which emanate from their high appetite. Probably it is right to say that broilers appetite depends on energy concentration of the diet but the optimum energy concentration of the diet is still highly disputable. Therefore taking into the account chick's real energy requirements, considering physiological and environmental changes relative to the values exhibited in chick's requirements tables seems to be a viable strategy for optimizing the production costs. Poultry nutritionists have been trying to make an accurate estimation of bird's energy requirements using statistical models. Energy models estimate energy considering different influential factors on bird's energy requirements. But since these estimative models express energy requirements as kcal day-1, it seems essential to know the amount of chick daily feed intake in different stages of growth which can help to formulate diets with optimum energy levels. Also, FI models can be applied in quantitative and qualitative feed restriction programs in order to assign optimum feed allocation. Considering the importance of an accurate estimation of birds daily feed intake and its impact on making these estimative models more practical, this study aimed at using four quadric regression models estimating daily feed intake relative to chick's daily body weight according to the data provided by Ross 308, Cobb 500, Arbor Acres and Lohmannn performance tables. The results led to the definition of four quadric regression models with a high coefficient of determination (R2). Therefore, it can be concluded that there is a high correlation between daily feed intake and daily body weight changes in the foregoing strains of broiler chicks.
 
 
 
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