akbar yaghoobfar

This experiment was conducted with the aim of the effects of pellet and mash feed on the production index, intestinal morphology characteristics, index of ascites, quality and microbial count of litter in broiler chickens using three diets of pellet, mash, mash+pellet on broiler performance. This experiment was conducted in a completely randomized design with three treatments and four replicates during 42 days. The measured traits included production index, intestinal morphology traits, ascites, hematocrit percentage, litter moisture and nitrogen content and microbial count of litter. In the whole of the total period, the results showed that the highest production indexes were pellet and pellet+mash treatments. The results of the morphological traits of the intestine showed that pellet and pellet+mash treatments had the highest ratio of villus height to the crypt depth in jejunum and the lowest level of mash treatment was observed. The results showed that the high ratio of villus height to the crypt depth in jejunum resulting from the use of pellet and pellet+mash ration due to production index was improved. The consumption of mash and pellet+mash treatments in the first three weeks reduced ascites significantly and increased with the prolonged feeding period of the pellet diet. The pellet+mash and all-flour treatments had the lowest amount of moisture content and nitrogen content, and as a result, the microbial count of litter was lower than that of pellet treatment. The pellet+mash treatment had the lowest index of ascites (32.62%) and less hematocrit (36%). The final result was that the use of pellet+mash treatment had the highest production index and the most suitable litter quality and the lowest ascites and microbial count compared to the full pellet diet in broiler chickens.

This experiment was conducted to evaluate the effects of physical form, barley variety and enzyme addition on Ileal digestibility, apparent metabolizable energy (AME) and energy efficiency of broiler chickens.The experiment was carried using a factorial experiment with a completely randomized desiegn. Factors were barley varity (Fajr, Reyhaneh, and Yosef), diet form (mash or pellet) and enzyme level (0 and 0/05 g/kg dry matter). Here 927 one day-old Ross 308 broiler chickens were assigned to 12 treatments, 3 replicates and 27 chickens in each replicate. The results of experiment indicated that the digestibility of nutrients, AME, apparent metabolizable energy corrected to zero nitrogen retention (AMEn) and energy efficiencies (NE/AMEn) affected by barley variety (p 005), NE, AME and AMEn (p

A study was conducted to determine the effects of diet formulation on Arian broiler breeder performance in their 50 to 64 wks of age. One hundred and sixty eight female and 24 male breeders were employed in 8 treatments of 3 replicates (7 females plus a male) in a completely randomized design (a factorial experience of 2 × 2 × 2). Eight experimental diets were formulated based on three factors, the first factor including, two levels of Apparent and True Metabolisable Energy corrected for nitrogen (AMEn and TMEn), the second factor being:, two levels of Total Amino Acids (TAAF) and Digestible (DAAF) of Feed, The third factor was included two levels of broiler breeder hens Requirements as based on Total Amino Acids (TAAR) and Digestible ones (DAAR). The results indicated that egg weight was significant difference on the main effects of energy and the main effects of amino acids of feed and requirements no significant (p<0.05). Treatment No. 3 (AMEn + DAAF + TAAR) was at the best level significantly in egg weight, 68.97 (g), egg production, 62.45, egg mass, 43.1 (g/hen/day) and feed conversion ratio 3.59 and treatment No. 7 (TMEn + DAAF + TAAR) was the worst level significantly in egg weight 66.51 (g), egg production, 48.21, egg mass, 31.99 (g/hen/day) and feed conversion rate 5.07. Percentage of eggs can incubate and hatchability was significant in the main effects of energy, amino acids of feed and requirements and fertility was significant in the main effects of energy and amino acids of feed, number of chicks per hen was significant in the main effect of energy and amino acid requirements (p<0.05). Percentage of eggs can incubate was in treatment No. 5 (TMEn + TAAF + TAAR), 99.48 %, fertility was in treatment No. 4 (AMEn + DAAF + DAAR), 91.87 %, hatchability was in treatment No. 2 (AMEn + TAAF + DAAR), 78.37% and the number of chickens obtained from any hens during the experimental period (50 to 64 weeks), was in treatment No. 6 (TMEn + TAAF + DAAR), 37.83 chicks, at the highest significantly level compared to Duncan multiple range test (p<0.05). This experiment showed that the type of diet formulation had significant effects on broiler breeder performance.

Diet components are one of the determination factors for changing of morphology of small intestines which lead to a change in digestien and absorption of nutritiond subs tonces.To study the histomorphometric changes of small intestine due to hull- less barley food diets in poultry, 20, of 70 weeks old healthy Road Island Red cocks were selected and divided equally into 2 experimental groups and fed with hull less barley, and commonly usual diet (control). Feeding was gradually and by adding the experimental food to the commonly used diet through one week. At the end of the week, all animals starved for 24 hrs and then fed with experimental diets for following week. At the end all animals were weighted and sacrificed after 24 hrs of starving. excreta viscosity and crude diet energy, crude excreta energy and metabolisable energy were measured and the data were analyzed using Duncan method. transverse sections from small intestine were successively cut with 2cm intervals and fixed with 10% buffered formalin. Routine histological laboratory methods were used and sections were studied under light microscope. Heights and width of the villi and dept of the crypts and goblet cells number were measured. Data's were statistically analyzed by ANOVA test. Results showed: increasing in viscosity, increasing the villus heights (p<0.001), villus width (p=0.002) and crypt depth (p<0.001) and number of goblet cells (p<0.001) in jejunum, decreasing in height of the villi (p<0.001) and increasing in crypt dept (p<0.001) and goblet cells number (p=0.04) in the duodenum and increasing of the crypt dept (p=0.004) in the ileum were observed respected to the control.